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Troubleshooting

1. Reverse selector worn 42 3rd gears worn damaged 2 gears 43 Final gears worn damaged 2 gears 44 Oitferential pinion shaft worn g Feedpipe O ring broken PROBABLE CAUSE Sprag clutch defective Sealing rings guide worn Axle inboard joint clip missing 4th gears worn damaged 2 gears PROBABLE CAUSES DUE TO IMPROPER REPAIR Improper clutch clearance Improper gear clearance Parking pawl installed upside down Parking shift arm installed upside down Sprag clutch installed upside down Feed pipe missing in governor shaft Reverse hub installed upside down Oil pump binding Torque converter not fully seated in oit pump Main seal improperly installed Springs improperly installed Valves improperly installed Ball check valves not installed Shift fork bolt not installed Flushing procedure repeat 3 times 1 Drain the trans 2 Refil with 3 A qts of Dexron recommended type ATF 3 Start the engine and shift trans to D4 4 Let trans shift through gears at least 5 times 5 Shift to reverse and neutral at least 5 times 6 Drain and refill B Set idle rpm in gear to specified idle speed If still no good adjust the motor mounts as Outlined in engine section of service manual c If the large clutch piston O ring is broken inspect the pis
2. 2 3 shift valve stuck 4 2 Loud popping noise when taking off in R 39 40 41 L a 21 3 4 shift valve stuck Ratcheting noise when shifting fram R ta 39 40 41 52 ta 22 Reverse control valve stuck P or from RtoN 23 Clutch pressure control valve stuck Noise from trans tn all selector lever posi 24 2nd onffice control valve stuck trons 25 Ortfice control valve stuck bg from trans only when wheels roil La 26 3 2 timing valve stuck Gear whine rpm related pitch changes KLO 27 kickdown valve stuck with shifts 28 Shift timing valve accumulator stuck Gear whine speed related pitch changes PLO zit 29 Low clutch accumulator defective 1 nee with speed 30 2nd clutch accumulator defective Trans will not shift into 4th gear in D4 31 3rd clutch accumulator defective Engine stalls on emergency stops shift 2 33 32 4th reverse accumulator defective lever in D4 only EEEE gene eeh es fea nt 4 Lockup clutch cut valve stuck Lock tutch d k m aa gesot lock upisima 3337 17 t Lockup clutch timing valve A stuck Lockup clutch does not operate properly 2 3 12 15 18 EL V Lockup clutch timing valve B stuck 33 34 35 36 Lockup clutch shift valve stuck 37 38 Lockup clutch control valve stuck j 7 T A eee ee iiaa AERE a E a Fansmission has multitude of problems 44 L Q Lockup control solenoid valve broken shifting at disassembly large deposits of metal found on magnet Shift fork bent Reverse gears worn damaged 3 gears
3. 6 50 In D3 or D4 trans starts in 2nd gear RG Slips in 3rd gear 10 21 23 31 C L U 45 46 Ships in 4th gear 11 23 32 46 ctu PROBABLE CAUSE Slips in reverse gear 11 32 c 1 Shift cable broken out of adjustment Slips on 2 3 upshift 3 15 24 ELV T e Throttle cable too short Slips on 3 4 upshift 3 15 25 T E L v 3 Throttle cable too long No upshift trans stays in low gear 12 13 14 19 E F G L 4 Wrong type ATF 23 5 Idle rpm too low high No downshift to low gear 12 19 GL 6 Oil pump worn or seized Late upshift J 2 12 13 14 EFLV 7 Pressure regulator stuck Early upshift 3 13 14 E F L V 8 Low clutch defective Erratic shifting 2 14 26 ji E F V 9 2nd clutch defective Harsh shift up amp down shifts 2 4 15 23 24 10 3rd clutch defective 25 27 48 7 11 4th clutch defective Harsh shift 1 2 2 9 P Harsh Sht 2 f 12 Governor valve stuck ars t 3 7 2 3 es lOa G DAVO V 13 Throttle A valve stuck Harsh shif om ai shift 3 4 2 11 23 25 C O 1LY 14 Modulator valve stuck h hifts mrri e Sieh Mick Gown Shits 2 23 27 L v a 15 Throttle B valve stuck H 4 kickdown shift 2 1 8 6 16 Oil screen clogged fe downshift 3 srap ateiosedithrote s 15 ET T7 Torque convertor defective Axie s slips out of trans on turns 44 51 18 Torque governor check valve st ck Axle s stuck in trans 44 19 1 2 shift valve stuck Ratcheting noise when shifting into R 6 7 39 40 41 K L Q o
4. Troubleshooting Symptom to System y J Greek sans Check these Check these SYMPTOM items on items on items on PROBABLE NOTES PAGE The following symptoms can be caused PROBABLE Check these CAUSE LIST by improper repair or assembly CAUSE DUE VAE Engine runs but car does not move in B7 16 K L R S TO IMPROPER any gear REPAIR Car moves in R and 2 but not in D3 or 8 29 45 49 te M O Car creeps in N R1 R2 D4 T T r Car does not move in D3 or D4 R5 ar moves in D3 D4 and R but notin 2 9 30 50 CLE Trans locks upin R R4 Car moves in D3 D4 and 2 but notin R oTi 2522 CLER Trans has no park R3 39 40 41 epee aoa ag Car moves in N 1 8 9 10 i1 C D xcessive drag in trans j 47 48 Excessive vibration rpm related R9 Excessive idle vibration i 5 17 B K L Noise with wheels moving only R7 Slips in all gears 6 7 16 Main seal pops out R10 S Slips in tow gear 8 29 45 46 49 Various shifting problems R11 R12 Stips in 2nd gear 9 20 23 30 C L U Harsh upshifts R13 4
5. ershaft and ring gear Be very careful not to damage the torque converter case when replac ing the main bail bearing You may also damage the oil pump when you torque down the main valve body this will result in ot pump seizure if not detected Use proper tools Onbwn Install the main seal flush with the torque converter case If you push it into the torque converter case until it bottoms out it will block the oll return passage and result tn damage Harsh downshifts when coasting to a stop with zero throttle may be caused by a bent in throttle valve retainer cam stopper Throttle cable adjustment may clear this problem See page 9 37 Check if servo valve check valve stopper cap s installed If it was not installed the check valve may have been pushed out by hydraulic pres sure causing a leak internal affecting all forward gears Throttle cable adjustment is essential for proper operation of the trans mission Not only does t affect the shift points if misadjusted but also the shift quality and lockup clutch operation A too long adjusted cable will result in throttle pressure being too low for the amount of engine torque input into the transmission and may cause clutch slippage A too short adjusted cable will result in too high throttle pressures which may cause harsh shifts erratic shifts and torque converter hunting 9 5
6. nd replace the torque converter If the low clutch feedpipe guide tn the end cover ts scored by the main shaft inspect the ball bearing for excessive movement in the transmis sion housing If OK replace the end cover as t 1s dented The O ring under the guide is probably broken Replace the mainshaft if the bushings for the low and 4th feedpipe are loose or damaged if the low feedpipe 1s damaged or out of round re place it If the 4th feedpipe is damaged or out of round replace the end cover A worn or damaged sprag clutch is mostly a result of shifting the trans o in D3 or D4 while the wheels rotate in reverse such as rocking the car in snow P Inspect the frame for colision damage Inspect for damage or wear Governor shaft woodruff key Reverse selector gear teeth chamfers Engagement teeth chamfers of countershaft 4th amp reverse gear Shift fork for scuff marks in center Differential pinion shaft for wear under pinion gears Bottom of 3rd clutch for swirl marks a Replace items 1 2 3 and 4f worn or damaged If trans makes clicking grinding or whiring noise also replace mainshaft 4th gear and reverse idier gear and counter 4th gear in addition to 1 2 3 or 4 f differential pinion shaft is worn overhaul differential assy and replace oil screen and throughly clean trans flush torque converter and cooler and lines If bottom of 3rd clutch ts swirled and trans makes gear noise replace count
7. ton groove for rough machining If the clutch pack is seized or is excessively worn inspect the other clutches for wear and check the orifice control valves and throttle valves for free movement E If throttle valve B is stuck inspect the clutches for wear If the modulator valve is stuck open does not modulate line pressure the trans will shift normally with less than 5 8 throttle but will shift up F very late over 5 8 throttle If the modulator valve is stuck closed throt tle valve A pressure will be zero and result in early upshifts and no forced downshift f the 1 2 valve is stuck closed the transmission will not upshift If stuck open the transmission has no low gear If the 2nd orifice control valve ts stuck Inspect the 2nd and 3rd clutch packs for wear If the 3rd orifice control valve is stuck Inspect the 3rd and 4th clutch packs for wear If the clutch pressure control valve is stuck closed the transmission will not shift out of low gear Improper alignment of main valve body and torque converter case may cause oil pump seizure The symptoms are mostly an rpm related ticking noise high pitched squeak In severe instances it may stall the engine Foltow instruction procedure If the oil screen is clogged with particles of steel or aluminum inspect the oil pump and differential pinion shaft If both are OK and no cause for the contamination is fou

Troubleshooting

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