Symptom-to-Component Chart
Hydraulic System
Before troubleshooting a problem on Hydraulic system, check the self-diagnosis Dl ('97 - 98) or Lq ('99 - 00) indicator
light indication. lf the El or E indicator light indicates a trouble code, perform the electrical troubleshooting according to
the Electrical System-to-Component Chart. lf the Ol or E indicator light does not indicate a trouble code and failure is not
found on the electrical troubleshooting, perform the hydraulic troubleshooting following the chart.
SYMPTOMCheck these items on the
PROBABLE CAUSE List
Check these items on
the NOTES List
Engine runs, but vehicle does not move in any gear.1r2FAt?82?K,L.R,S
Vehicle moves in El. @, but not in lE. E, E, or E, position6, 8, 9, 10, 29, 52c,M,o
Vehicle moves in [D!. E, E. E, E, but not in E] position.al
Vehicle moves in .&1, E. E, E, E, but not in E position4,6, 14, 15c,L.o
Vehicle moves in E position.10 , 12, 13, ' l4, '16, 2A, 32, 33, 34
Excessive idle vibration1,2, 18,3'1,35, 44, 46, 41B,K,L
Poor acceleration; flares on starting off in E, Di position
or E position
Stall rpm hish in El, El, E, E, E Position
Stall rpm hiqh in E, E, E, E position
1,2,3,6,37, 40K,L,R
6, 8, 10C,D
Stall rpm high in E positionc,D
Stall rpm high in hl position14N
Stall rpm low17,31, 44, 46, 47R
No shift18, 19, 39, 47, 48G,L
Fails to shift in Pr, E position or E position; from 1st to
3rd gear
21, 48
Fails to shift in EJ, E position or E position; from 1st to
4th gear
21,22, 47
Erratic upshifting
fz upshlft. ,3 ripshlft, 3r. up+ilft57
ffi20, 47
il21, 4A
3-4 upshift22, 47
Harsh upshift ('l-2)12, 18, 19,2A,49, 50, 56, 57
Harsh upshift (2-3)13, 1A, 19,23,26,28, 49, 50, 56, 57C,D.E,H,L
Harsh upshift {3-4)14,1A, 19,24,27,28, 49, 50, 56. 57C, D, E, I,L
Harsh downshitt (2-1)18, 19,23, 42,53,56,51o
Harsh downshift (3-2)12, 18,19,24,41,42, 54. 56, 57, 58
Harsh downshift (4-3)13,'1A, 19, 25, 41, 42, 55, 56, 57C, D, E, I
Flares on 2-3 upshift13,1A,19,23,26,50FI
Flares on 3-4 upshift14, 1A, 19,24,27,50E,L,N
Excessive shock on 2-3 upshift13. '18, 19 , 23, 26, 42, 49 , 50, 51E.L.N
Excessive shock on 3-4 upshift14, 1A, 19,24,27 , 42, 49,50,51E,L,N
Late shift from N position to ld or Erl position. or to E
position
10, 29M
Late shift from E position to E position4, 14,20,51o
Noise from transmission in all shift lever positions2,36K,L.O
Vehicle does not accelerate more than 3l mph (50 km/h).11
(cont'd)
14-153
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Symptom-to-Component Chart
Hydraulic System (cont'd)
SYMPTOMCheck these items on thePROBABLE CAUSE ListCheck these items onthe NOTES Lisr
Shift lever does not operate smoothly.o, JdPFails to shift; stuck in 4th gear.14, 41 , 48
Transmission will not shift into park in E position.6, 38, 61PStall rpm high; all clutch pressures are in specification.40D,K,OLock-up clutch does not disengage.18, 43, 44, 45, 46, 49,50,57
Lock-up clutch does not operate smoothly.14, 40, 43, 44, 45, 46, 49, 50. 57Lock-up clutch does not engage.'t8, 40, 43, 44, 45, 46, 49, 50, 56, 57Vibration in all positions.
No engine braking in I position.59
Shift position indicator does not indicate anv position,6. 38, 60
PROBABLE CAUSE
I 33 Thrust washer worn/damaged
ATF pump worn or binding34Clutch clearance incorrect
Regulator valve stuck or regulator valvespflng wornDrive plate delective or transmission mtsas-sembled
Servo valve stuck5ttTorque converter housing or transmissionhousing bearing worn/damagedMainshaft worn/damaged
Shift cable broken/out of adjustmentATF strainer clogged
7Final gears worn/damaged38Shift cable is worn where it attaches to thetransmission or at the body mountsIOne-way (sprag) clutch worn/damaged
1st gears worn/damaged {2 gears)39Modulator valve stuck10lst clutch defective40Torque converter check valve stuck112nd gears worn/damaged (2 gears)41Foreign material in separator plate't22nd clutch defectiveCPB valve stuck
t53rd clutch defective43Lock-up timing valve stuck144th clutch defective44Lock-up shift valve stucktcReverse gears worn/damaged (3 gears)Lock-up control valve stuck16Excessive ATF46Lock-up clutch Diston defective17Torque converter one-way clutch defective47Shift control solenoid valve A defecttve
18Linear solenoid assemblv defective (,98 - OOmodels)48Shift control solenoid valve B dsfectrve
49Lock-up control solenoid valve A defective'19CPC valve stuckLock-up control solenoid valve B deleqtve20l-2 shift valve stuck51Servo control valve stuck212-3 shift valve stuck52lst accumulator defective3-4 shift valve stuck53Foreign material in 2nd exhaust orifice2nd accumulator defective54Foreign material in 3rd exhaust orifice3rd accumulator defectiveForeign material in 4th exhaust orifice4th accumulator defective56Mainshaft speed sensor defective262nd orifice control valve stuckCountershaft speed sensor defective273-4 orifice control valve stuck583rd sub accumulator defective2aForeign material in main orifice59lst-hold clutch defective29Foreign material in lst orifice60A/T gear position switch defective or out ofadjustment30Foreign material in reverse orifice
31Engine output low61Park gear mechanism defective32Needle bearing worn/damaged
14-154
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Symptom-to-Com ponent Chart
Hydraulic System (cont'd)
NOTES
See flushing procedure, page l4-264 and 265,
BSet idle rpm in gear to specified idle speed. lf still no good, adjust motor mounts as outlined in enginesection of this manual.
clf the large clutch piston O-ring is broken, inspect the piston groove for rough machining.
Dlf the clutch pack is seized or is excessively worn. inspect the other clutches fot wear, and check the orificecontrol valves, CPC valve, and linear solenoid for free movement.
lf the linear solenoid is stuck, inspect the clutches for wear.
lf the 1-2 shift valve is stuck closed. the transmission will not upshift. lf stuck open, the transmission hasno lst gear.
Hlf the 2nd orifice control valve is stuck, inspect the 2nd and 3rd clutch Dacks for wear.
lf the 3-4 orifice control valve is stuck, inspect the 3rd and 4th clutch packs for wear.
Jlf the clutch pressure control valve is stuck closed. the transmission will not shift out of lst gear.
Klmproper alignment of main valve body and torque converter housing may cause ATF pump seizure. Thesymptoms are mostly an rpm-related ticking noise or a high-pitched squeak.
Llf the ATF strainer is clogged with particles of steel or aluminum, inspect the ATF pump and differentialpinion shaft. lf both are OK and no cause for the contamination is found, replace the torque converter.
Mlf the lst clutch feed pipe guide in the end cover is scored by the mainshaft. inspect the ball bearing forexcessive movement in the transmission housing. lf oK, replace the end cover as it is dented. The o-rinounder the guide is probably worn.
N' Replace the mainshaft if the bushing for the 4th feed pipe is loose or damaged, lf the 4th feed pipe is darrFaged or out of round. replace the end cover.' Replace the mainshaft if the bushing for the l st feed pipe is loose or damaged. lf the 1st feed pipe is dam-aged or out of round, replace it.
oA worn or damaged sprag clutch is mostly a result of shifting the transmission in E!. E, or E positionwhile the wheels rotate in reverse. such as rocking the vehicle in snow.
PInspect the frame for collision damage.
lnspect for damage and wear:
l. Reverse selector gear teeth chamfers.
2. Engagement teeth chamfers of countershaft 4th and reverse gear.
3. Shift fork for scuff marks in center.
4. Differential pinion shaft for wear under pinion gears.
5. Bottom of 3rd clutch for swirl marks.
Replace items 1, 2, 3. and 4 if worn or damaged. lf transmission makes a clicking, grinding, or whirring noise,also replace mainshaft 4th gear, reverse idler gear, and countershaft 4th gear in addition to 1,2, 3, or 4.lf differential pinion shaft is worn, overhaul differential assembly, replace ATF strainer, and thoroughly cjeantransmission, flush torque converter. cooler, and lines,lf bottom of 3rd clutch is swirled and transmission makes gear noise. replace the countershaft and final drivenoear,
Be very careful not to damage the torque converter housing when replacing the main ball bearing. you
may also damage the ATF pump when you torque down the main valve body. This will result in ATF pumpseizure if not detected. Use the Drooer tools.
SInstall the main seal flush with the torque converter housing. lf you push it into the torque converterhousing until it bottoms out, it will block the fluid return passage and result in damage.
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