42re has one glitch - JeepForum.com

 
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post #1 of 15 Old 05-29-2016, 09:44 AM Thread Starter
GOLDWING
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42re has one glitch

Occasionally when I accelerate from a stop at or near full throttle the transmission will act as if it momentarily slips out of gear at or near the shift point in second gear. When it happened I just let off the throttle and it re-engaged and worked as normal. This has only happened a couple of times.

The TV cable is properly adjusted. The fluid and filter were changed 5,000 miles ago and the fluid level is spot on. I have not adjusted the bands and have no idea when they were last adjusted.

There are no signs of slippage at any other time. It locks up normally in OD and shifts very smoothly.

Has anyone seen this before? Any hints? Thanks in advance.

GW

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post #2 of 15 Old 05-29-2016, 09:49 AM
wingless
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Is this symptom discussed in the FSM troubleshooting table? What are the potential offenders defined in that document?
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post #3 of 15 Old 05-29-2016, 09:50 AM
xprezoh
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Garage
having the same problem
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post #4 of 15 Old 05-29-2016, 10:25 AM Thread Starter
GOLDWING
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Quote:
Originally Posted by wingless View Post
Is this symptom discussed in the FSM troubleshooting table? What are the potential offenders defined in that document?
I don't know. I guess it's time to order an FSM.

GW
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post #5 of 15 Old 05-29-2016, 11:02 AM
MrRoundel
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Yes, the FSM is a must. I know that you can find downloads on them. I'd steer clear of the freebies, unless it's through a well-known Jeep site or something. Such things are known to contain strange code-monsters, etc.

It could be the front band needs adjustment, clutch or servo failure, governor circuit electrical fault, or pump suction passage leak.

Have you replaced your pressure solenoid and sensor? This is a common repair to our transmissions. For the pump suction-passage, you can look at your trans dipstick after driving for a while to see if there is a lot of foam present. These are from the '98 FSM. There were others, but it sounds like you've dealt with those issues/adjustments. Good luck.
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post #6 of 15 Old 05-29-2016, 11:29 AM
1996maroonzjf
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Quote:
Originally Posted by GOLDWING
I don't know. I guess it's time to order an FSM. GW
Try Jeepslimited.com. That's where I got my '96 FSM for free with zero problems. You have to make an account and then the download is free. I printed mine out at work and put it in a three ring binder.

-Tim
96 4.0 Laredo, 42RE, NP242, HP30 & D35c 3.55, OME 2.5" HD Coils, Bilstein 5100s, IRO Adj. LCAs
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post #7 of 15 Old 05-29-2016, 11:48 AM Thread Starter
GOLDWING
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I just ordered one for $8 off of amazon.
looks good. Time for some studying.

GW
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post #8 of 15 Old 05-29-2016, 04:12 PM
kg6mov
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Have you noticed whether it does it only when cold? Hard throttle like that when the trans isn't ready can make it act up like that with age.

1996 ZJ Green Laredo V8, 2.5" OME and Bilsteins, 33's, Holes drilled in the roof.
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I heard someone yell "mall crawler" from the back porch. I'll go see who said that. Be right back.
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post #9 of 15 Old 05-29-2016, 06:46 PM
1190405
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I have exactly the same problem...and if I DON't let off the gas for a second and continue pressing it down, the tranny will buck and feel like it is jolting back and forth...
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post #10 of 15 Old 05-29-2016, 07:10 PM
kg6mov
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If it does it all the time then your TV cable is out of adjustment or you need to do band adjustment.

1996 ZJ Green Laredo V8, 2.5" OME and Bilsteins, 33's, Holes drilled in the roof.
1998 ZJ 5.9 - Junked
1984 F250, 460 BB, T19, work truck/future tow pig
1987 Mercedes 300D Turbo, the diesel daily, 30mpg in style

Quote:
Originally Posted by Texas ZJ1 View Post
I heard someone yell "mall crawler" from the back porch. I'll go see who said that. Be right back.
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post #11 of 15 Old 05-29-2016, 08:13 PM Thread Starter
GOLDWING
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Quote:
Originally Posted by kg6mov View Post
Have you noticed whether it does it only when cold? Hard throttle like that when the trans isn't ready can make it act up like that with age.
Good question KG. I've never mashed the skinny pedal before the rig was up to operating temperature. My hunch says that there is an issue with a solenoid or the switch that controls it. I am going to study it tomorrow early in my new FSM.

GW
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post #12 of 15 Old 05-30-2016, 09:29 AM
Timo_90xj
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I'd start with checking & adjusting the front band as necessary. Front band is used ONLY on 2nd gear (no matter if in D-range or manual/ forced second), so slipping during gear shift could be caused by that. It can also be a valve body issue or a front servo issue.

1998 Grand Cherokee 5.9 LX daily driver, 1.75" BB, 32" KM2s, HPD30 Eaton e-locker/D44a stock LSD, 4.56 gears, custom- fabbed tube bumpers and tube fenders,...

http://www.jeepforum.com/forum/f13/d...s-etc-1222317/


1990 XJ Limited (4-door), 4.0 I6, AW4, NP242, ***rolled and totalled @ 165k miles***

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1990 XJ (4-door), 4.0 I6, AW4, NP242, PBR 42" tires, Unimog 404 portal axles, 110" WB, full cage + uniframe completely rebuilt, front 3-link + panhard / double triangulated 4-link rear,... ***SOLD***
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post #13 of 15 Old 05-30-2016, 09:42 AM Thread Starter
GOLDWING
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Quote:
Originally Posted by Timo_90xj View Post
I'd start with checking & adjusting the front band as necessary. Front band is used ONLY on 2nd gear (no matter if in D-range or manual/ forced second), so slipping during gear shift could be caused by that. It can also be a valve body issue or a front servo issue.
It is not slipping during the upshift from 2nd to third. It happens just prior to when I would expect it to upshift. The RPMs jump as if it slipped into neutral, and when I lift off of the throttle it re-engages.

GW
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post #14 of 15 Old 05-30-2016, 09:57 AM
Timo_90xj
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I thought you meant it slips during 1-2 upshift.
So you're saying it happens just before tranny would shift from 2nd to third?

1998 Grand Cherokee 5.9 LX daily driver, 1.75" BB, 32" KM2s, HPD30 Eaton e-locker/D44a stock LSD, 4.56 gears, custom- fabbed tube bumpers and tube fenders,...

http://www.jeepforum.com/forum/f13/d...s-etc-1222317/


1990 XJ Limited (4-door), 4.0 I6, AW4, NP242, ***rolled and totalled @ 165k miles***

***Under construction***
1990 XJ (4-door), 4.0 I6, AW4, NP242, PBR 42" tires, Unimog 404 portal axles, 110" WB, full cage + uniframe completely rebuilt, front 3-link + panhard / double triangulated 4-link rear,... ***SOLD***
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post #15 of 15 Old 05-30-2016, 04:58 PM Thread Starter
GOLDWING
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That's what it feels like. I couldn't get it to do it at all today, so maybe there isn't anything seriously wrong. I guess I will just have to wait and see.

GW
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