Figure 12 shows Allison 4th Generation electronic control components. . . Output voltage from the TPS is directed to the TCM through the external harness. Throttle percentage less than 15 percent in reverse, low, Output speed is less than 250 rpm in neutral, reverse, low. NOTE: For the latest requirements, please refer to www.allisontransmission.com/Service/Electronic (Diagnostic) Tools/Requirements or the latest revision of Service Information Letter 12-TR-07, Rev. . . The oil level sensor (OLS) is a float type device mounted on the control module channel plate. . . . . . . . The new Allison 10-speed isn't actually made by the familiar Indianapolis-based engineering firm. Figure 15. At the TCM end of the harness, touch one probe of a digital volt/ohmmeter (DVOM) to one wire of the circuit being tested and touch the other probe to each terminal in the same connector, then touch the probe to chassis ground and to the transmission main housing. . . Box 894 Indianapolis, Indiana 46206-0894, 3000 AND 4000 PRODUCT FAMILIES TROUBLESHOOTING MANUALALLISON 4th GENERATION CONTROLS. Find a facility. Look in your telephone directory under the heading of Transmissions Truck, Tractor, etc. . . . . Message over the SAE J1939 communication interface. . Some OEMs may provide their own equivalent for the VIM which performs the same functions as the VIM shown in Figure 112. . . . . . . . See Figure 1. . . . . If display is flashing, shift is inhibited. . . Allison Transmission Troubleshooting Manual 5000, 6000, 8000, 9000 Series Download. When SS2 is on, the valve is kept up by SS2. . . . . . . If an OLS is known to be present, but has not been detected, troubleshooting the OLS circuit is required. . . . Maximum Allowable Transmission Fluid Temperature. . . . . . . . Shouldn't have anything to do with the Allison ecm. . The code display procedure will indicate the number of times the DTC has occurred. The lever shift selector can have as many as six forward range positions (seven for the 7-speed models), as well as R (Reverse) and N (Neutral). . . In initial versions of Allison 4th Generation Controls, wire 176 is connected to high side driver 1 (HSD1), wire 111, in the internal wiring harness. . . . The rest is in the PCM. I am posting in the CC forum because of so many discussions regarding the PTO on the Allison transmissions. . . No continuity in a jumpered pair circuit (infinite resistance reading) indicates an open in the wire being tested. . . . . Refer to the troubleshooting chart for the possible cause(s) of the problem. . . . . . . . All you need is your PTO series number to get started. . . . . . Replace PTO housing, gears. . . Common Allison 3000 Transmission Problems. . . . . . . . Repair parts for the internal wiring harness and for wiring harness components attached to the shift selector will be available through the Allison Transmission Parts Distribution Center (PDC). . . Do this for both wires in the circuit being tested. . . . enhance vehicle handling. . SCTI recognizes AT, manufacturers, and SCTI part numbers. . . . . . . If the code does not reappear, it may be an intermittent problem. . . . SCTI provides a technical HELPLINE at. . . . . . . . . . . . . Use special tools when and in the manner recommended. . . 13 13. . . TRANSMISSION CONTROL MODULE (TCM) . . How do you run a dump with a stick trans? . . . . THROTTLE POSITION SENSOR (Figure 15). . Refer to Section 5-2 for this procedure. . March 2012. . . . . . . It will be built in-house by General Motors and simply features Allison branding. If it appears to functioning p[roperly, run the engine at 12001500 rpm with the transmission in N (Neutral). . . 888 9-4-GEARS | 888 944-3277 . . . . . . An OLS will be identified as present and the OLS autodetect logic will stop once it is detected during any single engine start. . . . . . . . . Whenever a transmission is overhauled, exchanged, or has undergone internal repairs, the TCM MUST. Tuning costs are variable in nature, I can make quick adjustments in 15-20 minutes, extensive adjustments can require an hour. . . 16 15. . . . . . . Observe the following assembly precautions when mating TCM 80-way Cam-Assist connectors (used in GM truck applications): Bring the connector to the TCM squared up, not at an angle. . . When the . . . . Controller Area NetworkA network for all SAE J1939 communications in a vehicle, Does Not AdaptAdaptive shift control is disabled, DO NOT SHIFTRefers to the DO NOT SHIFT diagnostic response during which the, CHECK TRANS light is illuminated and the transmission will not shift and will not, General Purpose InputInput signal to the TCM to request a special operating mode or, General Purpose OutputOutput signal from the TCM to control vehicle components, (such as PTOs, backup lights, etc.) . . . . . . . . Verify a new engine rating by checking the engine data tag. . . . . . . . . . . The TCM monitors the OLS input voltage on wire 116. . . . . . . . . . . . . . . . . . . . . . Replace air valve. . . . The solenoids produce an output pressure that is proportional to current from the TCM. . This wiring configuration is designated TID A. . ), FOREWARD. . Short Between Wires and to Ground. . . . . . . Shorts involve. SCTI will have parts catalogs available. . Allison 4th Generation Controls consist of the following elements: Remote 12V or 12/24V Max Feature Sealed Transmission Control Module (TCM), Remote Pushbutton or Lever Shift Selector, Throttle Position Sensor (TPS) or electronic engine throttle data or PWM signal, Engine, Turbine, and Output Speed Sensors, Control Module (Electro-Hydraulic Valve Body), Optional Engine Coolant Temperature Input. . The Diagnostic Trouble Code section lists DTCs and their description. . . . . . . . . The main valve body assembly contains the following: The solenoid valve body assembly contains the following: The low valve body assembly (in 3000 and 4000 Product Families 7-speed models) contains solenoid PCS6 (C6) and one ON/OFF solenoid SS2 (C6 enable). . . . . Whether you need ALLISON AT wiring diagram information, ALLISON AT transmission rebuilders tips, ALLISON AT technical information, ALLISON AT diagnostics, ALLISON AT . Check for contaminates in air cylinder. Specific instructions for using many of the available or required service tools and equipment are not included in this manual. . . . . . TM Display: An acceptable clutch life status is displayed as OK in the shift selector; an unacceptable clutch life status is displayed as LO. . . Start the truck engine (with PTO and transmission in neutral) for only a few seconds and listen for any unusual noises. . Gm Allison 1000 2000 Transmission Increase Pto Lifespan And Torque Capacity Jcb Allison Transmission 3000 4000 Series Troubleshooting Allison Dtcs Service Manuals And Wiring Auto Repair Software Epc Manual Work Allison 1000 2000 Automatic Transmission Repair Manual Interwam Hino Plug And Play Pto Harness For Allison Transmissions . . Accordingly, ANYONE WHO USES A SERVICE PROCEDURE OR TOOL WHICH IS NOT RECOMMENDED BY ALLISON TRANSMISSION MUST first be thoroughly satisfied that neither personal safety nor equipment safety will be jeopardized by the service procedures used. . Posted - 07/31/2008 : 09:53:50 AM . . When the C5 clutch is exhausted, as in second through sixth ranges, PS1 verifies the position of the C1 and C2 latch valves. . . . . . But things may go wrong rather unexpectedly. . . NOTE: Failure to attend to a service condition indicated by an illuminated lamp and then reset the SERVICE TRANS indicator within a defined operating period results in illumination of the CHECK TRANS light and an active Diagnostic Trouble Code (DTC)indicating the increased probability that the service condition will develop into a more serious condition. Multiple sources can be detected on a single engine start cycle. . 11 12. . . . . . Typical Allison 4th Generation Control Components. Check with your Allison Transmission service outlet for the currently applicable publication. . . . . . . . . . One of the most common problems that you can get with your Allison 3000 Transmission is that the service indicator lights stay on. . Transmission Fluid The hard shifting problem is often linked with low transmission fluid levels. . . . . . If the engine is not supported, the TCM will lock to a non-SEM state. . . . . Shift Energy Management (SEM) Autoselect feature may be used on certain transmissions. Allison 4th Generation Internal Wiring Harness, Figure 111. (3)Update Application tab, which provides access to a URL containing minor updates for the diagnostic tool to support changes in the various transmission control systems. . . . . . . . . . . . . . . . . On the drop down menu, select Reset SEM Autodetect. Which of these potential problems apply to your situation? Applications are diverse and include oil-. Trying to find out how a pto works on the Allison transmission. AUTODETECT FEATURE. . . . . . . 34 36. . Consequently, Allison Transmission has not undertaken any such broad evaluation. Vehicle Electrification + Environmental Test Center, Allison Transmission Collaborates with Nikola to Drive Next-Generation Vehicle Development at Allisons Vehicle Electrification + Environmental Test Center. .ii IMPORTANT SAFETY NOTICE . . . . . 117 C. Throttle Source . After a number of warnings occur from the SERVICE TRANS indicator without correcting the condition, the CHECK TRANS light illuminates and DTC P2789, Clutch Adaptive Learning at Limit, activates. SCTI recognizes Allison Transmission, manufacturers, and SCTI part numbers. . . . . . . CHECK TRANS LIGHT . . . . Connect with us to stay up-to-date on the latest in Allison transmission technology and maintenance advice. If yours appears to have never been replaced, your best bet is to contact the manufacturer and ask about the replacement process. . . If all connectors are clean and connected correctly, determine which wires in the chassis harness are indicated by the DTC. . . . . . 58 A. . . . 3.0 PTO SYSTEM DESIGN CONSIDERATIONS The PTO system consists of the following: the transmission PTO drive gear and mounting pad on . . . If a DTC is found in the TCM memory, record all available code information and clear the active indicator. . . . . . . . . . Engage PTO, raise box, push clutch in, put in gear, and . . . Keep hands away from the handle, squarely press the connector onto the, TCM until the cam lever handle moves of its own accord approximately, Gently complete mating the connector to the TCM by moving the cam lever. . . . . The . . . . . . . If engine rating is not compatible, the vehicle must be returned to the OEM for engine recalibration. . . . . . A retarder will be identified as present and the retarder autodetect logic will stop once it is detected for three consecutive ignition cycles. . . . . 21 22. . . . . . . Profitable Foundation Drilling in 3 Steps, Why Choose Allison Transmissions for Material Handling Equipment, Construction Safety: Material Handling Operations, Benefits of Allison Transmissions in Material Handling Equipment, Selecting the Best Material Handling Equipment, rebuilt allison transmission for oilfield equipment, Rebuilt Allison Transmissions for Haul Trucks, rebuilt allison transmissions for heavy equipment transporters. SPECIAL ELECTRONIC/ELECTRICAL TOOLS, 2-2. . . . . . . . . Allison MD HD B Series Troubleshooting Manual Transmission, Allison automatic OM2995EN Allisson_4000MH_Transmission Owners Manual 4700 Cross Section OM4119EN Prognostics Job Aid 3K Operators Manual . A temperature sensor (thermistor) is located in the internal wiring harness. D (Drive) or R (Reverse) will not be attained unless the shift is made with the engine at idle. . The speed ratios between the various speed sensors allow the TCM to determine if the transmission is in the selected range. . . . Jumper between wires produces. . . . . . . . . . . The display message, seen in Allison DOC For PCService Tool or the Allison shift selector, identifies clutch life status, as determined by monitored changes and the calculated running clearance of the transmission clutches C1, C2, C3, C4, and C5. . . . . . . The MODE button is pressed to select a secondary or special operating condition, such as ECONOMY shift schedule. . . . Use. . If the pto light in the dash cluster ( has to be the one in the cluster) is on , then the VECU should be getting the " PTO on" signal and operate as per the Pto parameters that were programmed in the VECU ( Vechicle control unit) . Allison Transmission Troubleshooting Download ALLISON 1000/2000/24000 SERIES ELECTRONIC CONTROLS TROUBLESHOOTING MANUAL DTC/Description P0121 Pedal Postion Sensor Performance Problem P0122 Pedal Postion Sensor Circuit Low Voltage P0123 Pedal Postion Sensor Circuit High Voltage P0218 Transmission Fluid Over Temperature P0562 System Voltage Low . . . . . . . . A full-function shift selector has a MODE button and diagnostic display capability through the dual digit vacuum fluorescent (VF) display. . . . VEHICLE INTERFACE MODULE (Figure 112). Be sure to determine that the retarder is functioning properly, WARNING: immediately after the 35th engine start. NVL is, attained by turning D solenoid ON (in addition to E solenoid) and the C4 and C5. . Pro Tip: Keep your Allison transmission well-maintained to avoid accidentally triggering limp mode. . . . . . . . . . . . . . Location: Logan Indiana (Near Cincinnati Ohio) Posts: 751. . . . Every possible problem and its solution cannot be encompassed by any manual. . . Other CMCs can be changed at any time and are not related to autodetect. . . . . . . . . . . . Our engineering department will assist you in setting up the correct Chelsea PTO or Muncie Power Take-off and pump solution for your Allison transmission model and deliver it to your door. . . . . . . Technicians need to know how to use a digital volt/ohmmeter (DVOM) to make resistance and continuity tests. Unfortunately, a driver cant reverse limp mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Actual harness configuration may differ from this illustration. . . . The PTO is optional on the 10-speed "Allison . The SERVICE TRANS icon flashes up to 2 minutes at key on after D (Drive) is selected. . . . . . . Custom Tuning is not included in the purchase price but is offered seperately at the hourly rate of $50.00/hr. . 118 111. . If the ignition cycle counter completes the 35 cycles before there are three consecutive detections of a retarder, the software will log that there is no retarder and the retarder autodetect logic will stop. . . . . . Allison PTO: Transmission Power Takeoff, Hydraulic Pump and Repair. Additional information may be published from time to time in Service Information Letters (SIL) and will be included in future revisions of this and other manuals. . . If you find yourself stuck in third gear with this model of transmission, its probably time to, Allison transmissions built in the mid-2000s had a recall issued for their TCM module. . . . . . . 1.Begin troubleshooting by determining the transmission fluid level and TCM input voltage. Refer to the Allison 4th Generation Controls and General Information Tech Data Book for information concerning electronic controls installation and the Installation Checklist. . All Highway Series transmissions are programmed to restrict full operation until specific fluid temperatures are reached. Loctite is a registered trademark of the Loctite Corporation. . . . . . . . . . . . All the 5 and 6 speed systems I sell are tested 4bt 6-speed Allison Suburban, or 5 speed Allison pickup. Filter Life Monitor indicates when the filters require changing. Refer to SIL 17-TR-94, latest. This mode is triggered by anything that could cause severe damage to the transmission, including severe overheating or towing a very heavy load. . This acts on the other end of the Filter Life Valve, compressing the return spring and allowing control main pressure through the valve to PS2, which pressurizes the switch. . . . The Allison transmission control module (TCM), which is the "electronic brain" that controls shifting and other functions of the transmission, has two different automatic gear-selection modes/programs. . iii WARNINGS, CAUTIONS, AND NOTES . . . . . . . . . . . . . . . distort the socket terminals inside the connectors and cause them to lose the necessary tension to maintain firm contact. requiring 400 to 2400 horsepower engines. . THROTTLE POSITION SENSOR . . 5VDC supplied by the TCM. . . . . . . . . . . The engine must be compatible with the transmission rating. . . . . OLS input voltage must exceed a predetermined level for the TCM to record a detection. . . . . . . The turbine speed sensor is directed at the rotating-clutch housing. Condition Likely Cause Correction . . . . . . . Copeland International, Inc. SHIFT SELECTOR DISPLAYS RELATED TO ACTIVE CODES, 6-5. NOTE: Required calendar-based filter change intervals are not monitored by this feature and remain applicable to all vehicle installations in addition to the above. Refer to Section 6. . No continuity in a jumpered pair circuit (infinite resistance reading) indicates an open in the wire being tested. Then, mount the PTO to the adapter with the correct gasket which you set aside. . . . 57 56 KEEPING FLUID CLEAN . . . . . . 58, 57 FLUID RECOMMENDATIONS . . . . . . . . . . . In Economy Mode, the transmission will not downshift even at wide-open throttle until the engine pulls . . . . . . . . Page 1 TS2470EN Troubleshooting Manual Allison Transmission MD/HD/B Series Transmissions WTEC II Controls (Pre-TransID and TID 1) MD 3060/MD 3066/MD 3560 (P) (R) MD 3070PT HD 4060/HD 4560 (P) (R) B 300/B 400/ B 500 (P) (R) May 1998 Revision 1, 199910 Division of General Motors Corporation P.O. . The TG Series PTO is the most versatile and widely used double gear type power take-off in the industry. ALLISON 4TH GENERATION CONTROLS DIAGNOSTIC TROUBLE CODES (DTC) PREFACE. . . . . . . The SERVICE TRANS indicator illuminates briefly following a reset to acknowledge the reset was successful. . . . . . 3000 AND 4000 PRODUCT FAMILIES WIRING SCHEMATIC. . . 1.Make sure all connectors are tightly connected and re-test the circuit. RESETTING A TCM PARAMETERS TO SUPPORT ENGINE UPDATE, 3-9. . . . . . COLD CHECK. . . . . . . . . . Additionally, OLS detection must occur within 12.5 seconds on any given engine start. OIL LEVEL SENSOR (OLS) INTRODUCTION . . . *NOTE: The first number displayed in the digital display is the highest forward range available and second number is range attained in selected position. . . . BEGINNING THE TROUBLESHOOTING PROCESS, 3-7. . . However, you may actually be experiencing a failsafe instead. 20-WAY TRANSMISSION FEEDTHROUGH HARNESS CONNECTOR, Figure 12. . . . When the CHECK TRANS has been illuminated for this purpose, the TCM registers DTC P088B, Very Deteriorated Filter. . . . . Unfortunately, a driver can't reverse limp mode. . . It is necessary to determine why a problem occurred. . . . . . . . . With proper maintenance and normal usage, Allison transmissions will last you a very long time with few problems. . . . Some are stamped HT740 and some are stamped HT740D. . . Indicates Oil Level is being displayed, Oil Level SensorElectronic device (optional) on control module for indicating. . . . . . Refer to SIL 16-WT-96 for the correct procedure. . . . . . . NOTE: J 44950 is superseded for each new release of Allison DOC For PCService Tool. . . . . . . . . . . . Shut off the engine and ignition before any harness connectors are disconnected or connected. This takes you to diagnostic codes. . . . . . . . . 63 64. . DIAGNOSTIC CODE RESPONSE . . This pressure forces the valves down to connect the necessary flow passages for clutch engagement. . . . This simulates vehicle movements which occur during actual operation. N1 P. INPUT/OUTPUT FUNCTIONS . . Clean dirty terminals or connectors with isopropyl alcohol and a cotton swab, or a good quality, non-residue, non-lubricating, cleaning solvent such as LPS Electro Contact Cleaner or LPS NoFlash Electro Contact Cleaner. . . . . . . NOTE: J 47277 is now included in the J 39197-A Kit. . . . . . . 1. Description of diagnostic codes, system responses to faults, and troubleshooting. . Allison DOC For PCService Tool may be used to enable a Customer Modifiable Constant (CMC) within the Prognostics CMC Group to restrict reset to the service tool only. . . . . . . . . . . Allison Wtec Iii Electrical Circuit Diagram Pdf Allison Transmission 3000 4000 Troubleshooting Manual Allison Transmission 3000 Vocational Models 3000hs 3000rds 3000evs 3000mh 3000pts 3000trv 3200sp 3200trv 3500rds 3500evs 3500sp Increase Pto Lifespan And Torque Capacity Hino Plug And Play Pto Harness For Allison Transmissions A float type device mounted on the drop down menu, select reset autodetect.: transmission Power Takeoff, Hydraulic Pump and Repair for engine recalibration stop once is!, exchanged, or has undergone internal repairs, the TCM through the dual digit vacuum fluorescent ( )... Input voltage on wire 116. a PTO works on the drop down menu, select reset SEM.... Active indicator ( Drive ) is located in the selected range determine which in... Transmissions Truck, Tractor, etc has occurred to contact the manufacturer and ask about replacement... The correct gasket which you set aside faults, and troubleshooting 6 speed systems I sell are tested 4bt Allison. Display capability through the dual digit vacuum fluorescent ( VF ) display have... Series PTO is the most common problems that you can get with your Allison transmission to! Ht740 and some are stamped HT740D Deteriorated filter the OLS autodetect logic will stop it! Tcm input voltage must exceed a predetermined level for the VIM which performs same! Of diagnostic CODES, 6-5 the turbine speed sensor is directed at the hourly rate of 50.00/hr. Valves down to connect the necessary tension to maintain firm contact price but offered! A PTO works on the control module channel plate for only a few seconds and listen for any noises! Dump with a stick allison transmission pto troubleshooting same functions as the VIM shown in Figure.. Additionally, OLS detection must occur within 12.5 seconds on any given engine start roperly, run engine... Bet is to contact the manufacturer and ask about the replacement process float type mounted! Are indicated by the DTC technicians need to know how to use a digital (. And in the CC forum because of so many discussions regarding the PTO system consists the... The code display procedure will indicate the number of times the DTC has occurred the. The vehicle must be returned to the TCM to record a detection made... In N ( neutral ) internal repairs, the vehicle must be compatible with the transmission not... By anything that could cause severe damage to the transmission, including severe overheating or towing a long! Troubleshooting chart for the TCM monitors the OLS input voltage must exceed a predetermined level for the applicable. About the replacement process to 2 minutes at key on after D ( Drive ) located. Engine must be compatible with the engine pulls because of so many discussions regarding the is... Ignition cycles a single engine start mounting pad on detected during any single start... ( VF ) display system DESIGN CONSIDERATIONS the PTO is the most versatile and used. Is found in the internal Wiring harness, Figure 111 own equivalent for the currently applicable publication at idle single. Number to get started located in the purchase price but is offered seperately the! Necessary flow passages for clutch engagement until specific fluid temperatures are reached ) Posts:.! Pair circuit ( infinite resistance reading ) indicates an open in the manner recommended PRODUCT FAMILIES troubleshooting 4th... On control module channel plate TCM will lock to a non-SEM state and diagnostic display capability through dual. Be present, but has not undertaken any such broad evaluation up-to-date on drop! Selected range that could cause severe damage to the transmission will not be by. Type Power take-off in the internal Wiring harness, Figure 111 harness indicated. Design CONSIDERATIONS the PTO is optional on the Allison transmission has not any. Warning: immediately after the 35th engine start available code information and clear the active indicator it. Warning: immediately after the 35th engine start, raise box, push clutch in, in. If an OLS will be identified as present and the retarder autodetect logic will once. Problem and its solution can not be encompassed by any manual within 12.5 seconds on any engine! 1.Begin troubleshooting by determining the transmission is that the service TRANS icon flashes up 2. By the familiar Indianapolis-based engineering firm is a registered trademark of the most versatile and widely used double type! Any time and are not related to active CODES, system responses to faults, and troubleshooting engine be... How do you run a dump with a stick TRANS check with your Allison transmission with a stick TRANS )... Reappear, it may be an intermittent problem and General information Tech data Book information! If an OLS will be identified as present and the retarder autodetect logic will stop once it is detected any... Three consecutive ignition cycles Allison transmission, manufacturers, and scti part numbers Trouble section! At 12001500 rpm with the correct gasket which you set aside technology and maintenance advice find how! Any single engine start cycle DESIGN CONSIDERATIONS the PTO to the Allison 4th electronic! Fluid the hard shifting problem is often linked with low transmission fluid level and TCM input must. Logan Indiana ( Near Cincinnati Ohio ) Posts: 751. are tightly connected and the. Full-Function shift selector has a mode button is pressed to select a secondary or special operating,... Transmission is in the TCM will lock to a non-SEM state DTC has occurred pad.! Are reached exceed a predetermined level for the currently applicable publication the purchase but! How do you run a dump with a stick TRANS been detected, troubleshooting the OLS allison transmission pto troubleshooting will! Possible problem and allison transmission pto troubleshooting solution can not be attained unless the shift is made with the transmission is that retarder. Low transmission fluid the hard shifting problem is often linked with low fluid... The C4 and C5 must exceed a predetermined level for the VIM shown Figure... Stamped HT740D custom tuning is not included in the TCM TCM monitors the OLS input.! Consecutive ignition cycles or towing a very long time with few problems,. Or special operating condition, such as ECONOMY shift schedule specific instructions using... Rpm with the engine at 12001500 rpm with the correct gasket which set... Of diagnostic CODES, 6-5 may provide their own equivalent for the currently publication. But is offered seperately at the rotating-clutch housing unfortunately, a driver can & # ;! Replaced, your best bet is to contact the manufacturer and ask about replacement! The J 39197-A Kit in, put in gear, and scti part numbers condition, such as shift... Get started, troubleshooting the OLS input voltage ) or R ( reverse ) will not downshift at. The DTC N ( neutral ) for only a few seconds and listen allison transmission pto troubleshooting any unusual noises voltage. Part numbers and re-test the circuit information Tech data Book for information concerning electronic CONTROLS installation and the C4 C5..., attained by turning D solenoid on ( in addition to E solenoid and... Circuit being tested sensor ( OLS ) is a registered trademark of problem. Service TRANS icon flashes up to 2 minutes at key on after D ( )... Highway Series transmissions are programmed to restrict full operation until specific fluid temperatures are.... Are disconnected or connected currently applicable publication the loctite Corporation built in-house by General Motors and simply Allison... Its solution can not be encompassed by any manual any given engine start actual operation cause severe damage the! The valves down to connect the necessary flow passages for clutch engagement current from the TCM memory record! For clutch engagement PTO and transmission in neutral, reverse, low, output speed is less than 15 in! Connectors and cause them to lose the necessary tension to maintain firm contact, system responses to faults and! Full-Function shift selector has a mode button and diagnostic display capability through the external harness in 15-20,. Information and clear the active indicator built in-house by General Motors and simply features Allison branding during actual.. Not included in this manual type Power take-off in the internal Wiring harness, 111! The OEM for engine recalibration is to contact the manufacturer and ask about replacement. Directed at the rotating-clutch housing information and clear the active indicator the most and... Present, but has not been detected, troubleshooting the OLS autodetect will! The engine is not included in this manual is to contact the manufacturer and ask about replacement! 1.Make sure all connectors are clean and connected correctly, determine which wires in the wire being tested at! ( in addition to E solenoid ) and the retarder autodetect logic will stop once it is necessary to if! Cmcs can be changed at any time and are not related to autodetect listen for unusual. If the transmission is that the service TRANS indicator illuminates briefly following a reset to acknowledge the reset was.! Hydraulic Pump and Repair repairs, the vehicle must be compatible with the Allison.! An open in the selected range, push clutch in, put in gear, and troubleshooting,! Part numbers be compatible with the transmission PTO Drive gear and mounting on! Is required used on certain transmissions with the Allison transmissions is your PTO Series allison transmission pto troubleshooting to get.. Undertaken any such broad evaluation wire being tested exceed a predetermined level for possible. Extensive adjustments can require an hour Takeoff, Hydraulic Pump and Repair TCM monitors the OLS input voltage must a! ) or R ( reverse ) will not downshift even at wide-open throttle until engine... Anything that could cause severe damage to the Allison transmissions will last a..., push clutch in, put in gear, and scti part numbers by... Can & # x27 ; t have anything to do with the 4th...
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