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Posted on Jun 14, 2017

My 1995 Jeep GGC is in limp home mode. 2nd & 3rd gear only. Before resetting the TCM, had codes 21, 22, and 23. But now just 21 and it's consistant. I've replaced the control soleniod in valve body and changed the filter and fulid with ATF+4. I suspect it's an electrical problem in a TCM circuit, but I can't find an schematic for a 1995. I have the schematic for a 1996 which doesn't have a TCM, it has a PCM. Can you point me to a 1995 TCM schematic? Al

5 Related Answers

Anonymous

  • 1 Answer
  • Posted on Mar 07, 2009

SOURCE: Transmission problem

I had a shifting problem. The car would start in the wrong gear and shift at wrong times. I repaced the governor postion sensor and tranny fluid and the problem has been fixed for several years. Did you replace the tranny fluid?

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Anonymous

  • 366 Answers
  • Posted on Mar 07, 2009

SOURCE: 95 Grand Cherokee transmission runs in 3rd gear only

blown fuse is a sign of a problem of a bad elect. circuit,grounding wire,wires touching each other,pinched wires,corrosion in elect.connection,unless its a common problem it can be hard to find!seems theres no quick fix,maybe they should refer you to some one that specializes in car elect.problems.

Anonymous

  • 1 Answer
  • Posted on Apr 28, 2009

SOURCE: 1996 Jeep Cherokee electrical schematics and 1998 jeep cherokee

I need the bulb for the roof light for the 1996 Cherokee

Anonymous

  • 1 Answer
  • Posted on Feb 18, 2010

SOURCE: I have Jeep GC from 2000 with 4.0 engine, and

i have this same problem with my jeep. i am going to change the shift solenoid out.

Anonymous

  • 630 Answers
  • Posted on Sep 17, 2010

SOURCE: My 2000 Jeep grand cherokee

First of all i would walk away from this guy, he tells you whatever you feel is the problem as being....NO WAY....and his recommendations are off the hook so seems he is at a loss himself, i would suspect the 3-4 shift solenoid, I would also want to look into the BCM its electrical connectors and grounds as well as a good look at the torque converter lockup.... If you are getting no place fast trying to self diagnose i recommend you having a reputable trans shop give you a diagnosis on the problem first before doing any repairs...in otter words perhaps allow them the first hundred dollars to test and replace anything not too major and then stop and give you a report as to what there findings are.... look inside the shifter console I believe some models have the BCM located inside it...sometimes the connectors get coffee or soda leaking on them and causing corrosion?
Hope this helps.

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0helpful
1answer

1995 vw o96 automatic transmission

You may have an internal loos of hydraulic pressure due to a leaking seal. You could also have a fluid pressure sensor issue. You must use a scanner to diagnose this, sorry you don't have one but the use of the tool is not optional if you want to diagnose the problem.
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My 1995 jeep grand Cherokee is stuck in 2nd gear and won't shift at all one censor has been replaced and it's still not shifting there is some noise in the front axle

6 posts now.
and why not read the long post answering all that.
that is limp home mode,
the trans in your car has a TCM (tranny brain computer) that
does all shifting for you.
and if its unhappy it goes to limphome.
like all computers, if the inputs are wrong so will be outputs (shift solenoids)

what you do is get the TCM scanned.
Transmission control module.

why not stick to 1 post and add to just one post. add facts
or ask specific questions to this.
and is 2 problems , (front axle is not related to trans if in 2wd)
3helpful
1answer

Transmision starts out in 1st shifts to 2nd then third but will not shift into overdrive , but once it reaches 3rd gear ,it stays there when you come to a stop . after that it will only shift manually...

Sounds like your transmission is in limp mode. This is a fault mode in which the transmission either loses electrical power or the PCM deactivates all of the electronics. The transmission will default to max line pressure. The driver will have Reverse and 3rd, with manual 2nd available by putting the gearshift in 2 or 1 (doesn't matter). 1st, 4th, and TCC lockup will not be available. It will not hurt the car to drive it like this for short periods, but use manual 2nd to get the car moving, and be aware that the trans will generate more heat than normal while operating in limp-home mode due to increased torque converter slippage during 2nd gear starts and no lockup in 3rd gear.

The other from what you described, trans shifts 2nd to 3rd by itself in D or OD and locks the converter : ShiftA solenoid failed. Easy fix in the pan. Or a wiring problem from PCM to trans.. or PCM.

Thank you for using fixya and have your Safari scanned for the DTC codes that would indicate what issues your transmission is having to put you in to limp mode.
2helpful
1answer

1996 gmc jimmy will not shift to 3rd gear

Hi, It may be in LIMP mode.

What is "limp-home mode" ? This is a fault mode in which the transmission either loses electrical power or the PCM deactivates all of the electronics. The transmission will default to max line pressure. The driver will have Reverse and 3rd, with manual 2nd available by putting the gearshift in 2 or 1 (doesn't matter). 1st, 4th, and TCC lockup will not be available. It will not hurt the car to drive it like this for short periods, but use manual 2nd to get the car moving, and be aware that the trans will generate more heat than normal while operating in limp-home mode due to increased torque converter slippage during 2nd gear starts and no lockup in 3rd gear.

Common failures on 4L60E, symptom any possible repair:

Trans shifts into gear harshly, car feels sluggish off the line, No 1st, 4th or TCC lockup available, Manual 2nd, 3rd and Reverse are only available gears, CEL is on: Transmission is either in limp-home mode or has lost electrical power. If there are lots of error codes in the PCM, check the under-hood fuse that powers the transmission, and if it pops again, look for a short in that circuit like an O2 sensor harness touching exhaust. Otherwise, check PCM codes for a particular fault in the transmission causing the PCM to put it in limp-home mode.

No 1st or 4th available; trans shifts 2nd to 3rd by itself in D or OD and locks the converter :ShiftA solenoid failed. Easy fix in the pan. Or a wiring problem from PCM to trans.. or PCM.

Car goes into gear but feels very sluggish like the brakes are dragging, but it will roll easily (starts out in 4th gear), you manually shift to 2 to get it moving, once it's moving you put it back in OD and the car shifts 3rd to 4th on its own and locks the converter at the appropriate time: ShiftB solenoid failed: Easy fix in the pan. Or a wiring problem from PCM to trans.. or PCM.

Trans seems noisy when moving in 1st and Reverse, noise goes away instantly if you shift to N or the trans goes into 3rd gear: Reaction planetary is worn out due to high miles or insufficient lubrication. Not a critical failure, but not a good sign either. R&R sooner rather than later.

3rd gear starts, can manually shift through all gears. When car has been turned off for a bit, then back on it will run normally.: VSS dropoff w/ Hi-stall converter. The rpms are too high, but VSS is showing no movement. Happens after a tire burning take-off. Doesn't store a code, will not throw a CEL (I've heard that it will store a code if it happens 3 or more times). Cure: Reprogram PCM for VSS dropoff -- PCMforLess knows about it.

If you can get the Jimmy for no more then $500.00 and the engine sounds good and body is good, you may want to invest in the repair of the jimmy. Also note that to have a close look at the fuel line along the frame on the drivers side just by the back doors, the line is know to corroded there on all the SUV's
1helpful
1answer

Starts out in 3rd gear

Trans shifts into gear harshly, car feels sluggish off the line, No 1st, 4th or TCC lockup available, Manual 2nd, 3rd and Reverse are only available gears, CEL is on: Transmision is either in limp-home mode or has lost electrical power. If there are lots of error codes in the PCM, check the underhood fuse that powers the transmission, and if it pops again, look for a short in that circuit like an O2 sensor harness touching exhaust. Otherwise, check PCM codes for a particular fault in the transmission causing the PCM to put it in limp-home mode.
What is "limp-home mode" ? This is a fault mode in which the transmission either loses electrical power or the PCM deactivates all of the electronics. The transmission will default to max line pressure. The driver will have Reverse and 3rd, with manual 2nd available by putting the gearshift in 2 or 1 (doesn't matter). 1st, 4th, and TCC lockup will not be available. It will not hurt the car to drive it like this for short periods, but use manual 2nd to get the car moving, and be aware that the trans will generate more heat than normal while operating in limp-home mode due to increased torque converter slippage during 2nd gear starts and no lockup in 3rd gear.
Before guessing at transmission problems, check the fluid level (car warmed up, engine running in Park on level ground) and have the PCM scanned for trouble codes FIRST. This guide is meant for problems that do not show up as PCM codes (like shift A&B solenoid failures, for example).
Thank you for using fixya and good luck
2helpful
1answer

Will not shift into 2nd gear on a automatic trans

Trans shifts into gear harshly, car feels sluggish off the line, No 1st, 4th or TCC lockup available, Manual 2nd, 3rd and Reverse are only available gears, CEL is on: Transmision is either in limp-home mode or has lost electrical power. If there are lots of error codes in the PCM, check the underhood fuse that powers the transmission, and if it pops again, look for a short in that circuit like an O2 sensor harness touching exhaust. Otherwise, check PCM codes for a particular fault in the transmission causing the PCM to put it in limp-home mode.

What is "limp-home mode" ? This is a fault mode in which the transmission either loses electrical power or the PCM deactivates all of the electronics. The transmission will default to max line pressure. The driver will have Reverse and 3rd, with manual 2nd available by putting the gearshift in 2 or 1 (doesn't matter). 1st, 4th, and TCC lockup will not be available. It will not hurt the car to drive it like this for short periods, but use manual 2nd to get the car moving, and be aware that the trans will generate more heat than normal while operating in limp-home mode due to increased torque converter slippage during 2nd gear starts and no lockup in 3rd gear.

Thank you for using fixya and good luck
1helpful
1answer

Only runs in 1st and 2nd gear and reverse.

This is a fault mode in which the transmission either loses electrical power or the PCM deactivates all of the electronics. The transmission will default to max line pressure. The driver will have Reverse and 3rd, with manual 2nd available by putting the gearshift in 2 or 1 (doesn't matter). 1st, 4th, and TCC lockup will not be available. It will not hurt the car to drive it like this for short periods, but use manual 2nd to get the car moving, and be aware that the trans will generate more heat than normal while operating in limp-home mode due to increased torque converter slippage during 2nd gear starts and no lockup in 3rd gear.

Trans shifts into gear harshly, car feels sluggish off the line
, No 1st, 4th or TCC lockup available, Manual 2nd, 3rd and Reverse are only available gears, CEL is on: Transmission is either in limp-home mode or has lost electrical power. If there are lots of error codes in the PCM, check the under hood fuse that powers the transmission, and if it pops again, look for a short in that circuit like an O2 sensor harness touching exhaust. Otherwise, check PCM codes for a particular fault in the transmission causing the PCM to put it in limp-home mode.

No 1st or 4th available; trans shifts 2nd to 3rd by itself in D or OD and locks the converter : ShiftA solenoid failed. Easy fix in the pan. Or a wiring problem from PCM to trans.. or PCM.

Car goes into gear but feels very sluggish like the brakes are dragging, but it will roll easily (starts out in 4th gear), you manually shift to 2 to get it moving, once it's moving you put it back in OD and the car shifts 3rd to 4th on its own and locks the converter at the appropriate time: ShiftB solenoid failed: Easy fix in the pan. Or a wiring problem from PCM to trans.. or PCM.
1helpful
1answer

4L 60E - 2001 k1500 will not shift into 3-4. Oil is not burn't and stifts great into1-2

  • No 3rd or 4th gear: “3-4” clutches are worn out. R&R. The car is safe to drive (in 2) until you can get it fixed.
  • Trans shifts into gear harshly, car feels sluggish off the line, No 1st, 4th or TCC lockup available, Manual 2nd, 3rd and Reverse are only available gears, CEL is on: Transmission is either in limp-home mode or has lost electrical power. If there are lots of error codes in the PCM, check the under hood fuse that powers the transmission, and if it pops again, look for a short in that circuit like an O2 sensor harness touching exhaust. Otherwise, check PCM codes for a particular fault in the transmission causing the PCM to put it in limp-home mode.
  • No 1st or 4th available; trans shifts 2nd to 3rd by itself in D or OD and locks the converter : Shift A solenoid failed. Easy fix in the pan. Or a wiring problem from PCM to trans.. or PCM.
Check to see if your transmission is in the limp mode, which would only give you 2nd, 3rd and reverse gears. No 1st or 4th gear.
0helpful
2answers

95 grand cherokee 4.0 4wd w/ auto trans. starts in 3rd gear, manually shifting to 1st only gives 2nd gear, won't shift down on own, won't go to OD & OD selector button does nothing, no light, no shift,...

it sounds like it is in limp in mode. try disconnecting the battery for ten minutes and reconnecting. this will reset the pcm and clear the fault codes. if it was just some sort of fluke if should be ok, if there is a problem it will return to limp in mode. if it wasn't acting up beforehand, it's more than likely an electrical, or computer problem, not a mechanical issue,
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