N:\common\FLOW CHART COVERS\TRANSMISSION DIAGNOSTIC FLOW CHARTS.doc 3L80, TH400, TH475, TH375 EARLY OR SOFT SHIFT Check fluid level and condition LATE, HARSH, OR NO SHIFT Check vacuum at modulator - test drive with kickdown switch unplugged ERRATIC SHIFT Monitor vacuum to modulator and clean governor LATE OR NO DOWNSHIFT ON COAST DOWN HARSH DOWNSHIFTS Monitor vacuum at modulator NO KICKDOWN SLIPPING, CHATTERING, SHUDDERING LEAKS From bellhousing Cooler fittings to case Governor cover Breather tube Pan Fluid foaming Fluid ok Fluid burnt Check filter and intake pipe and o-rings Monitor vacuum at modulator - check line pressure Unit failure Replace governor If harsh shift only, send valve body Late - harsh or no shift, clean governor In rare cases could be internal (pump) problem Send valve body In rare cases, could be modulator or modulator valve Clean governor Send valve body Send valve body In rare cases, may be an internal (pump) problem Connect test light to wire at single-wire connector on the left side of the trans - turn ignition switch on - push accelerator all the way to the floor Test light lights up Test light doesn't light up Send valve body Vehicle problem - check transmission control fuse at fuse panel and check kickdown switch Check fluid level and condition On diesels, check vacuum regulator valve Fluid ok Fluid burnt Unit failure Check line pressure and pull pan Extension housing Slinging around bellhousing Just running out Check pump bolts and seal - check for tool gauge in sealing area Check converter for cracks Check for cracked case Use sealer (liquid only) on fitting threads Check bolt torque Make sure cover is flat Reseal Fluid level over filled Overheating or restricted cooler Internal problem Check bolt torque Check for warped or bent pan rail Check seal bushing and for tool gouges in the seal to housing area - check yoke for wear or burrs Warranty coverage on seal for one time only CONTINUED NEXT PAGE n:\common\pdq\flowtran\3L80 5/2000 3L80, TH400, TH475, TH375 - cont. Line pressure specs: If kickdown switch is activated, pressure will be 90 - 110 psi. The Neutral @ 1000rpm / 55 - 70 psi pressure regulator and boost valves Drive @ 1000 rpm / 60 - 90 psi are in the pump Reverse @ 1000 rpm 95 - 150 psi NOISE From bellhousing In all gears except 3rd In all gears - changes with road speed Pump or converter failure Planetary failure Check driveline Possible internal failure ENGAGEMENT PROBLEMS Check fluid level and condition Delayed Check manual valve adjustment Check VRV on diesels Harsh Possible internal problem Check vacuum at modulator - if ok, check line pressure Soft or slipping on engagement Internal problem Fluid burnt Internal problem n:\common\pdq\flowtran\3L80two 5/2000 Most likely an internal failure 4L60E EARLY OR SOFT SHIFT Pull codes, check fluid level and condition If 95 or 96, model, check build date Built between 8/95 and 2/14/96 See Bulletin #66-71-03 and repair accordingly Fluid burnt LATE, HARSH, OR NO SHIFT Pull codes, check fluid level and condition Fluid burnt Fluid ok Internal Problem Sweep TPS and check VSS signal, check for updated PCM calibrations If it sets a clip code, check VSS circuit before replacing unit Send valve body Internal problem ERRATIC SHIFT Pull codes, check fluid level and condition Fluid burnt Fluid ok Internal problem Check wiring connectors Sweep TPS and check VSS signal Send valve body Internal problem LATE OR NO DOWNSHIFT ON COAST DOWN Stuck in 3rd gear until vehicle is shut off? Yes No Pull codes, look for 3 - 2 solenoid code Pull codes, look for solenoid codes Send 3 - 2 solenoid Solenoid codes , send all shift solenoids No solenoid codes - send valve body and Tran X Ask Trans Tech HARSH DOWNSHIFTS Pull codes, check fluid level and condition Fluid burnt Fluid ok Internal problem High pressure may be caused by a trouble code Send valve body Possible vehicle problem Internal problem NO KICKDOWN Pull codes, check fluid level and condition Check TPS voltage range and make sure accelerator linkage has full travel Send valve body Ask Trans Tech SLIPPING, CHATTERING, SHUDDERING If vehicle was built between 8/95 and 2/14/96, see Bulletin 66-71-03 and repair accordingly Pull codes, check fluid level and condition Pull pan to confirm if internal problem Ask Trans Tech LEAKS From bellhousing From vent tube From servo cover From governor cover From pan Check front seal and pump bushing, check converter for cracks Fluid level over-filled Internal problem Servo cover seal, check case for cracks or gouges Reseal cover, check case for cracks or gouges Repair, check pan rail for warpage CONTINUE NEXT PAGE n:\common\pdq\flowtran\4L60E 4/2000 NOISE From bellhousing In all gears except 3rd In all gears Pump problem Planetary failure Make sure it's not a vehicle problem Ask Trans Tech ENGAGEMENT PROBLEMS Harsh Soft Delayed Harsh, soft, or delayed - fluid burnt 4L60E CONTINUED Pull codes Pull codes May be caused by a trouble code Ask Trans Tech Check linkage adjustment Ask Trans Tech Unit failure Pressure regulator valve and boost valve are in the pump. n:\common\pdq\flowtran\4L60E2nd 4/200 4L80E EARLY OR SOFT SHIFT Pull codes Check line pressure Ask Trans Tech LATE, HARSH, OR NO SHIFT Pull codes and check speed sensors Check line pressure Ask Trans Tech ERRATIC SHIFT Pull codes and check wiring connections Monitor shift commands and shift with a manual shifter - such as a TRAN X LATE OR NO DOWNSHIFT ON COUNT DOWN Pull codes Pull codes Send force motor, boost valve, and pressure regulator valve (valves are in pump , but are accessible from pan) Ask Trans Tech No Kickdown Check TPS and accelerator linkage travel SLIPPING, CHATTERING, SHUDDERING Check fluid level and condition, pull codes, check for sensor related failure Internal problem LEAKS Locate leak, check for cracks or tool gouges on area of leak, repair as needed Prone to driveline problem causing case breakage or cracks on right side from rear up to vent NOISE Make sure it's in the trans and not in the vehicle Changes with engine speed Changes with road speed Pump or input area failure Make sure it's not the carrier bearing or the differential ENGAGEMENT PROBLEMS Pull codes Soft or delayed Harsh Unplug harness - if still soft or delayed, has an internal problem, Force motor (EPC) problem or pressure regulator and boost valve problem (all parts accessible by pulling pan) Pressure regulator valve and boost valve are in the pump. Failsafe is 2nd gear and reverse. HARSH DOWNSHIFTS n:\common\pdq\flowtran\4L80E 4/2000 700R4 - 4L60 Early or soft shift Check fluid level and condition Fluid ok Check TV pressure then check governor Send Valve body Late, harsh or no shift Check fluid level and condition Fluid burnt Neutrals out Fluid ok Check TV pressure then check governor Possible pump (internal) problem Send valve body Unit failure Erratic shift See if TV cable is sticking binding or dragging Governor may be dragging Valve body problem Possible pump problem (very rare) Late or no downshift on coast down Governor dragging Valve body problem Harsh downshifts TV pressure too high or cable sticking Valve body problem No kickdown Make sure accelerator pedal is reaching wide open throttle TV pressure too low Valve body problem Slipping, Chattering, Shuddering Check fluid level and condition Fluid ok Fluid burnt Check TV pressure Unit failure Leaks From bellhousing From governor cover From vent tube From servo cover From pan Front seal - check pump bushing, check converter for cracks Possible valve body problem Servo cover seal - check case for cracks or gouges Reseal cover - check case, for cracks or gouges Repair - check pan rail for warpage Internal problem From bellhousing In all gears except 3rd In all gears Pump problem Planetary failure Gear train or bearing failure Noise Engagement problems Harsh Soft Delayed Harsh, soft or delayed - fluid burnt Unit failure In failsafe TV pressure too high Internal problem Check manual valve adjustment TV pressure too low Internal problem Check fluid level and condition If fluid is foaming, check filter to pump seal and housing Internal problem If unit was just installed and has a late shift, check pressure. If 110 - 120 PSI, unit is in failsafe. Pull the cable tight, start engine and adjust pressure from high down to spec. 700's will do a 4 - 2 kickdown under 60 MPH. n:\common\pdq\flowtrans\700R4-4L60 4/2000 A4LD EARLY OR SOFT SHIFT LATE, HARSH, OR NO SHIFT ERRATIC SHIFT HARSH DOWNSHIFTS NO KICKDOWN SLIPPING, CHATTERING, SHUDDERING NOISE ENGAGEMENT PROBLEMS Check fluid level and condition Check for binding throttle valve linkage and kinked vacuum line to modulator Check cable adjustment From bellhousing Delayed Harsh Fluid burnt Fluid ok Internal failure Check throttle valve linkage adjustment and monitor vacuum signal at modulator Send modulator, valve body, and governor (install in that order) When cold on the first shift Check fluid level and condition Governor is sticking * #1 problem * Check throttle valve linkage adjustment and vacuum at modulator Send modulator, governor, and valve body (install in that order) Send valve body and governor (install in that order) LATE OR NO DOWNSHIFT ON COAST DOWN Send governor and valve body (install in that order) Unplug main harness connector - see if vacuum at modulator rises on deceleration Send valve body Send valve body Check fluid level and condition Check shift cable adjustment and pull pan Internal problem LEAKS From pan From bellhousing Between main case and bellhousing Check pump bushing and converter Retorque pan bolts Replace unit Check pan rail for warpage - check case and bolt holes for cracks Prone to engine - transmission alignment problems - it is almost always the fault of the engine See if flex plate is broken - very common problem due to engine - transmission alignment problems that are usually the fault of the engine Possible pump problem Check vacuum at modulator - should be 18 - 20 " Check shift cable adjustment Send modulator and valve body (install in that order) Internal problem 3 - 4 shift and lock-up are commanded by the computer - these two solenoids can set codes - governor stuck or sticking is a very common problem. AOD EARLY OR SOFT SHIFT Check fluid level and condition TV pressure too low, check and adjust Valve body problem - replace valve body Late, harsh, or no shift TV pressure too high - check and adjust Governor stuck or dragging - clean governor Valve body problem - replace valve body ERRATIC SHIFT TV cable dragging or sticking - may need new cable One gear affected - send valve body All gears affected - clean governor 1st shift late - rest of shifts stacked - clean governor LATE OR NO DOWNSHIFT ON COAST DOWN Governor sticking - clean governor Shift valve in valve body sticking - send valve body HARSH DOWNSHIFTS TV cable dragging on deceleration - may need new cable Sticking valve in valve body - send valve body NO KICKDOWN TV pressure too low - check and adjust Acceleration linkage not achieving wide open throttle - repair or replace parts as needed SLIPPING, CHATTERING, SHUDDERING Check fluid level and condition In 1st, 2nd, or reverse - internal problem In 3rd and/or 4th gear Check TV pressure Ok Low Clutch or band failure - internal problem Clutch or band failure - possibly caused by vehicle problem or improper installation LEAKS Only after sitting Leaking from bellhousing Only when running Check front pan bolts The same as with any other leaks - check for gouges or cracks in area of leak NOISE In bellhousing area In all gears In all gears except 3rd Possible pump problem Possible internal bearing failure Planetary gear train problem Engagement problems Check fluid level Harsh engagement Delayed engagement TV pressure too high - check and adjust Incorrect manual valve adjustment - check and adjust Boost valve or pressure regulator valve sticking - replace valve body Internal problem Front pump seal, o-ring or bolts n:\common\pdq\flowtran\AOD 4/2000 AODE, AODEW, 4R70W EARLY OR SOFT SHIFT LATE, HARSH, OR NO SHIFT ERRATIC SHIFT LATE OR NO DOWNSHIFT ON COAST DOWN NO KICKDOWN LEAKS NOISE ENGAGEMENT PROBLEMS HARSH DOWNSHIFTS SLIPPING, CHATTERING, SHUDDERING Pull codes - check fluid level and condition Early shifts Monitor shift commands - most likely a vehicle problem Check bulletins* Soft shift Most likely an internal problem Pull codes - check fluid level and condition Check bulletins* Affects one gear Affects all gears Possible valve body problem Monitor computer Possible internal problem Pull codes - check fluid level and condition Check bulletins* Use a shift monitor and manual shifter (Tran X, etc.) to determine if trans or vehicle related. Trans problem would likely be valve body related - vehicle problem could be wiring or VSS Monitor computer signals - most like a valve body problem Possible internal trans problem Pull codes - check fluid level and condition - may be high pressure caused by failsafe TPS adjustment or high idle speed are two possibilities Possible valve body problem Possible internal trans problem Check TPS and acceleration linkage range Possible valve body problem Possible internal trans problem Pull codes - check fluid level and condition Has a slipping code but fluid is ok Check VSS Check bulletins* Most likely an internal trans problem Fluid burnt From bellhousing From pan Other areas Check pan rail for warpage When running Locate source of leak Only after sitting Try sealer on front pan bolts Front pump seal - check bushing and converter hub Pump o-ring - check case for gouges If slinging around bellhousing, check for cracked converter Check bolt torque, check for cracks, check for tool gouges In bellhousing area In all gears In all gears except 3rd Possible pump problem Drive line noise or internal bearing failure Planetary gear train problem Does it have the updated TR/MLPS Pull codes - check fluid level and condition Possible internal problem *Several bulletins on shift or shudder complaints requiring PCM being repro- grammed, also other unique problems. The 1-2 and 2-3 shift accumulators are in the case - not in the valve body . Pressure regulator is in the valve body n:\common\pdq\flowtran\AODE 4/2000 EARLY OR SOFT SHIFT LATE, HARSH, OR NO SHIFT ERRATIC SHIFT LATE OR NO DOWNSHIFT ON COAST DOWN NO KICKDOWN LEAKS NOISE ENGAGEMENT PROBLEMS AXOD Check fluid level and condition Check TV pressure at port above top cooler line and adjust as needed Possible valve body problem - if unit must be removed to access valve body, do not replace valve body Check fluid level and condition Check TV pressure at port above top cooler line and adjust as needed Stripped governor gear - possible internal problem, Possible valve body problem - if unit must be removed to access valve body, do not replace valve body TV cable may be sticking Possible valve body problem - if unit must be removed to access valve body, do not replace valve body Possible governor problem Possible valve body problem - if unit must be removed to access valve body, do not replace valve body HARSH DOWNSHIFTS Check TV pressure - see if line pressure responds to throttle signal or if it stays on too high Possible valve body problem - if unit must be removed to access valve body, do not replace valve body TV pressure may be too low Possible valve body problem - if unit must be removed to access valve body, do not replace valve body SLIPPING, CHATTERING, SHUDDERING Check fluid level, condition, and TV pressure Fluid burnt Fluid and TV ok Add two quarts of fluid Now ok No help Drive for 20 minutes and recheck unit - was not hot enough when fluid was checked. Fluid temperature must be 150 -180 degrees to check properly Internal problem Side pan Bottom pan Channel plate (chain cover) or case Bellhousing Repair Covered under 500 miles Replace unit Check stator support (it is soft material) and convertor bushing for seeping - if scored, replace unit In all gears except 3rd Planetary failure Changes with engine speed Changed with road speed Pump failure or chain and sprockets Final drive failure Check fluid level Harsh Soft Check TV pressure If TV pressure will not respond to adjustment - possible valve body problem if unit must be removed to access valve body, do not replace valve body Make sure unit was 150 -180 degrees when fluid was checked Internal problem Temperature of this trans is very important when checking fluid level. If not fully warmed up, fluid will check ok, but will be approx. 2 quarts low. Final check fluid level often after at least 20 minutes of driving drive. n:\common\pdq\flowtran\AXOD 4/2000 C6 EARLY OR SOFT SHIFT Check fluid level and condition Check vacuum hose to modulator for kinks, pinching, or sucking shut and trapping valve Gas engine Diesel engine Check VRV Turn modulator screw in 2 turns Replace valve body LATE, HARSH, OR NO SHIFT Turn kickdown rod adjusting screw out 1/8th" inch Check vacuum at modulator Gas engine Diesel engine Check VRV Turn modulator screw 2 turns Clean governor Replace valve body ERRATIC SHIFT Check fluid level and condition Make sure kickdown rod or cable is not binding Make sure the vacuum hose to the modulator is not routed where it could be kinked or pinched Clean governor Replace valve body LATE OR NO DOWNSH Clean governor Replace valve body HARSH DOWNSHIFTS Gas engine Diesel engine Check VRV Change modulator Replace valve body NO KICKDOWN Adjust kickdown rod or cable Throttle linkage not reaching wide open throttle Replace valve body SLIPPING, CHATTERING, SHUDDERING Check fluid level and condition Check VRV on diesels Fluid ok Fluid burnt Check pan Unit failure If pan is clean, replace valve body LEAKS Locate source of leak Check area for tool gouges or cracks If in bellhousing area, check converter for crack Repair as needed NOISE Whining noise in bellhousing Clunking noise Noise in all gears except 3rd Pump is failing ENGAGEMENT PROBLEMS Check fluid level and condition Delayed Harsh Check shift linkage adjustment Check vacuum at modulator Internal problem Check line pressure and see if it responds to changes in vacuum See if valve behind modulator is stuck, or it modulator is bad Replace valve body Very rare for this to be a trans problem, usually in the drive train Planetary gear train is failing Check vacuum rise on deceleration n:\common\pdq\flowtran\C6 4/2000 TRANSMISSION CHATTERING OR SHUDDERING Electronic AODE, 4R70W, AXODE, 4R44E, 4R55E, 5R55E, E40D, 4R100, 4L60E, 4T60E, 4T80E, 4L80E, A604, 41TE, A606, 42LE, 42RE, 46RE, 47RE Modulator controlled C3, C4, C5, C6, A4LD, 180, 250, 350, 400, 475 Throttle cable controlled AOD, AXOD, ATX, 200R4, 700R4, 440T4, TH125, Chrysler non-electronic Correct fluid? Correct level? Fluid condition? Correct fluid? Correct level? Fluid condition? Go to Advanced Diagnosis Sheet after determining condition of symptoms by performing the following tests Correct fluid? Correct level? Fluid condition? Shudder in lockup - tap the brake pedal - shudder should go away Shudder on a shift will shudder when the shift occurs but not on acceleration Shudder after a shift will shift ok most of the time, but will shudder under a load or on acceleration On some vehicles, the wrong fluid or simply worn out fluid is the only problem Usually on internal problem such as a cut lip seal, o-ring, seal, or a checkball hanging, leaking, and in some cases missing Just another form of slipping - can be an internal problem or can be caused by external influences n:\common\pdq\flowtran\chatter 3/2000 E40D EARLY OR SOFT SHIFT LATE, HARSH, OR NO SHIFT ERRATIC SHIFT HARSH DOWNSHIFTS NO KICKDOWN SLIPPING, CHATTERING, SHUDDERING LEAKS NOISE ENGAGEMENT PROBLEMS Pull codes Codes No codes See Code Reference Chart Check F.I.P.I. on Diesels Possible valve body problem Possible unit failure Pull codes Check speed sensor - check T.P.S. pr gas engine - check F.I.P.L. on diesels Ask Trans Tech Check fluid level and condition Pull codes and check connections Send E400 test box, solenoid pack, and complete valve body Ask Trans Tech LATE OR NO DOWNSHIFT ON COAST DOWN Pull codes Send solenoid pack and valve body Ask Trans Tech Pull codes Send solenoid pack and valve body Ask Trans Tech Pull codes Most likely an engine problem - T.P.S. on gas engines - F.I.P.I. on diesel engines Possible valve body problem Ask Trans Tech Check fluid level and condition Pull codes Unit failure From bellhousing Extension housing seal and bushing area Slinging around bellhousing Running front of pump Converter is most likely cracked Pump seals, o-ring, or bolts *On ambulances only* grounding problem causes electrical arcing between yoke and bushing. Put ground strap on extension housing and on the differential From bellhousing In all gears except 3rd All gears all the time Pump problem Planetary gear train problem Bearing or bushing failure Delayed Harsh Is line pressure 55-65 in forward and 74-100 in reverse Yes No Remove engagement spring in valve body Internal problem Does it have the new M.L.P.S.? Check TPS or F.I.P.L . voltage - check idle speed Ask Trans Tech F.I.P.L.- Fuel Injection Pump Lever Sensor - the diesel version of a T.P.S. n:\common\pdq\flowtran\E40D 4/2000 TRANSMISSION EARLY SHIFT Electronic AODE, 4R70W AXODE, 4R44E, 4R55E, 5R55E, E40D, 4R100, 4L60E, 4T60E, 4T80E, 4L80E, A604, 41TE, A606, 42LE, 42RE, 46RE, 47RE Throttle cable controlled AOD, AXOD, ATX, 00R4, 700R4, 440T4, TH125, Chrysler non-electronic Modulator controlled C3, C4, C5, C6, A4LD, 180, 250, 350, 400, 475 Pull codes Cable too loose Vacuum hose pinched, collapsed, hooked to wrong source. See if vacuum drops when throttle is opened See Code Reference Chart If just installed, possible wrong governor *Wintertime* Ice in modulator line See Advanced Diagnosis Sheet If just installed - possible wrong governor See Advanced Diagnosis Sheet See Advanced Diagnosis Sheet n:\common\pdq\flowtran\earlyshi 3/2000 TRANSMISSION ERRATIC SHIFT Electronic AODE, 4R70W, AXODE, 4R44E, 4R55E, 5R55E, E40D, 4R100, 4L60E, 4T60E, 4T80E, 4L80E, A604, 41TE, A606, 42LE, 42RE, 46RE, 47RE Modulator controlled C3, C4, C5, C6, A4LD, 180, 250, 350, 400, 475 Throttle cable controlled AOD, AXOD, ATX, 200R4, 700R4, 440T4, TH125, Chrysler non-electronic Pull codes Codes No codes See Code Reference Chart Check wiring connections Cable sticking or dragging Governor sticking or dragging Valve body See Advanced Diagnosis Sheet Make sure hose to modulator is in good shape Check kickdown cable or switch Governor sticking or dragging See Advanced Diagnosis Sheet See Advanced Diagnosis Sheet Valve body n:\common\pdq\flowtran\erratic 3/2000 TRANSMISSION HARSH SHIFT Electronic AODE, 4R70W, AXODE, 4R44E, 4R55E, 5R55E, E40D, 4R100, 4L60E, 4T60E, 4T80E, 4L80E, A604, 41TE, A606, 42LE, 42RE, 46RE, 47RE Modulator controlled C3, C4, C5, C6, A4LD, 180, 250, 350, 400, 475 Throttle cable controlled AOD, AXOD, ATX, 200R4, 700R4, 440T4, TH125, Chrysler non-electronic Pull codes Codes No codes See Code Reference Chart See Advanced Diagnosis Sheet Is shift timing late or normal Late Normal Check cable adjustment or TV pressure setting See Advanced Diagnosis Sheet Is shift timing late or normal Late Normal Check kickdown cable Check for 18" vacuum at modulator See Advanced Diagnosis Sheet n:\common\pdq\flowtran\harsh 3/2000 TRANSMISSION HARSH DOWNSHIFTS Electronic AODE, 4R70W, AXODE, 4R44E, 4R55E, 5R55E, E40D, 4R100, 4L60E, 4T60E, 4T80E, 4L80E, A604, 41TE, A606, 42LE, 42RE, 46RE, 47RE Modulator controlled C3, C4, C5, C6, A4LD, 180, 250, 350, 400, 475 Throttle cable controlled AOD, AXOD, ATX, 200R4, 700R4, 440T4, TH125, Chrysler non-electronic Are upshifts ok Pull codes See Code Reference Chart Are upshifts ok See if cable is sticking or dragging Go to Advanced Diagnosis Sheet Are upshifts ok Make sure vacuum at modulator increases on deceleration Go to Advanced Diagnosis Sheet Go to Advanced Diagnosis Sheet n:\common\pdq\flowtran\harshdow 3/2000 TRANSMISSION LATE OR NO SHIFT Electronic AODE, 4R70W, AXODE, 4R44E, 4R55E, 5R55E, E40D, 4R100, 4L60E, 4T60E, 4T80E, 4L80E, A604, 41TE, A606, 42LE, 42RE, 46RE, 47RE Modulator controlled C3, C4, C5, C6, A4LD, 180, 250, 350, 400, 475 Throttle cable controlled AOD, AXOD, ATX, 200R4, 700R4, 440T4, TH125, Chrysler non-electronic Stuck in 1st gear or in fail safe? In failsafe Stuck in 1st gear Check speed sensor Pull codes Codes No codes See Code Reference Chart See Advanced Diagnosis Sheet Will it shift when you let off of the accelerator Yes No Cable is too tight Stuck or dragging governor Stuck or dragging governor Valve body (except 440-T4) See Advanced Diagnosis Sheet Check kickdown cable or switch Stuck or dragging governor Valve body See Advanced Diagnosis Sheet Check vacuum to modulator - needs 18" n:\common\pdq\flowtran\lateiorno 3/2000 TRANSMISSION LEAKS LOCATION OF LEAKS Pan Covered by warranty under 500 miles Cooler lines or fittings Loose or mis-matched fittings or cracked case Servo cover or extension housing to case Not common but can usually be field repaired Rear seal Use liquid teflon sealer only - teflon tape on fittings is a major cause of cracked case or cooler fittings Warranty coverage one-time only - check housing for gouges and yoke for burrs, etc. Bellhousing When running Not running Front pump seal or pump o-ring and/or pump bolts On some units, pan bolts provide into the bellhousing area and can be the source of small leaks Tool gouges and small cracks can also be the source of leaks n:\common\pdq\flowtran\leaks 3/2000 TRANSMISSION NO DOWNSHIFT STUCK IN HIGHER GEAR Electronic AODE, 4R70W, AXODE, 4R44E, 4R55E, 5R55E, E40D, 4R100, 4L60E, 4T60E, 4T80E, 4L80E, A604, 41TE, A606, 42LE, 42RE, 46RE, 47RE Modulator controlled C3, C4, C5, C6, A4LD, 180, 250, 350, 400, 475 Throttle cable controlled AOD, AXOD, ATX, 200R4, 700R4, 440T4, TH125, Chrysler non-electronic Most likely in failsafe so pull codes Codes No codes See Code Reference Chart Check power to trans and computer See Advanced Diagnosis Sheet Will it upshift and downshift manually Yes NO Clean or replace governor Does it bind up in reverse Yes NO Clutch or band welded or stuck Valve body See Advanced Diagnosis Sheet n:\common\pdq\flowtran\nodown 3/2000 TRANSMISSION NOISES KNOCKING NOISE usually a cracked or broken flexplate - common on A4LD's and TH350's. WHINING NOISE FROM THE BELLHOUSING usually indicates a failing pump or input area bearing. WHINING NOISE IN REVERSE is usally normal due to power flow through the gear train. WHINING OR GRINDING NOISE IN ALL GEARS EXCEPT 3RD GEAR is a sure sign of planetary component failure. STRANGE AND UNUSUAL NOISES usually have strange and unusual causes - see Advanced Diagnosis Sheet. WHINING NOISE IN ALL GEARS can be a sign of bearing failure, especially in the output shaft area. n:\common\pdq\flowtran\noises 3/2000 TRANSMISSION NO KICKDOWN Electronic AODE, 4R70W, AXODE, 4R44E, 4R55E, 5R55E, E40D, 4R100, 4L60E, 4T60E, 4T80E, 4L80E, A604, 41TE, A606, 42LE, 42RE, 46RE, 47RE Modulator controlled C3, C4, C5, C6, A4LD, 180, 250, 350, 400, 475 Throttle cable controlled AOD, AXOD, ATX, 200R4, 700R4, 440T4, TH125, Chrysler non-electronic Pull Codes See Code Reference Chart Check TPS Operating Range See Advanced Diagnosis Sheet Check cable or TV Pressure adjustment See Advanced Diagnosis Sheet Check detent cable or kickdown switch See Advanced Diagnosis Sheet n:\common\pdq\flowtran\nokick 3/2000 TRANSMISSION SLIPPING Electronic AODE, 4R70W, AXODE, 4R44E, 4R55E, 5R55E, E40D, 4R100, 4L60E, 4T60E, 4T80E, 4L80E, A604, 41TE, A606, 42LE, 42RE, 46RE, 47RE Modulator controlled C3, C4, C5, C6, A4LD, 180, 250, 350, 400, 475 Throttle cable controlled AOD, AXOD, ATX, 200R4, 700R4, 440T4, TH125, Chrysler non-electronic Pull codes See Code Reference Chart Find out which gear(s) and go to Advanced Diagnosis Sheet Some people confuse a late shift with slipping. Slipping should be considered as an incorrect gear ratio after a shift, or the clutch pack or band not allowing full power transfer. n:\common\pdq\flowtran\slipping 3/2000 TRANSMISSION SOFT OR SOGGY SHIFT Electronic AODE, 4R70W, AXODE, 4R44E, 4R55E, 5R55E, E40D, 4R100, 4L60E, 4T60E, 4T80E, 4L80E, A604, 41TE, A606, 42LE, 42RE, 46RE, 47RE Modulator controlled C3, C4, C5, C6, A4LD, 180, 250, 350, 400, 475 Throttle cable controlled AOD, AXOD, ATX, 200R4, 700R4, 440T4, TH125, Chrysler non-electronic Fluid level and condition and pull codes Codes No codes See Code Reference Chart If fluid is burnt, check Code Reference Chart for sensor related failure See Advanced Diagnosis Sheet Fluid level and condition Fluid ok Fluid burnt See Advanced Diagnosis Sheet See Advanced Diagnosis Sheet. Unit will most likely need to be replaced Fluid level and condition Fluid ok Fluid burnt See Advanced Diagnosis Sheet See Advanced Diagnosis Sheet. Unit will most likely need to be replaced n:\common\pdq\flowtran\softor 3/2000 TRANSMISSION VIBRATION Make sure it's not a shuddering or chattering problem Conditions Changes with engine speed Changes with road speed Most likely a driveline problem Will it vibrate in neutral when you rev the engine Yes No Possible engine mis-fire on malfunction under a load or possible mount problem Make sure trans was ordered for the correct engine size - some externally balanced engines have weights on the converter On some vehicles, it is possible to unbolt the converter and run the engine - this is a very good way to confirm diagnosis n:\common\pdq\flowtran\vibrastio 3/2000