42RE 2/3 shift issues - Jeep Garage - Jeep Forum

Go Back   Jeep Garage - Jeep Forum > Jeep Platform Discussion > Grand Cherokee - WJ > Troubleshooting/Problems

Join Jeep Garage Today
Reply
 
Thread Tools Display Modes
 
  #1  
Old 03-23-2016, 02:27 PM
Member
 
Join Date: Mar 2016
Posts: 14
Thanks: 2
Thanked 1 Time in 1 Post
Rep Power: 351
Blasimoto is on a distinguished road
42RE 2/3 shift issues

So... Ive gone through a bunch of steps to try to remedy the problem. At first, it would shift out of first to second w/o any problem, but 2nd to 3rd wouldn't take until about 3500 rpm. I've pulled the valve body to check the valves and springs. They checked out. Did a full(ish) flush (took about 8 quarts), new filter and gasket. Didnt solve the shifting. Initially I had a random misfire on all cylinders and read that the TPS could screw with the shifting pattern. So i swapped in a new TPS. Solved the misfire, but not the shifting. Today, I adjusted the bands to spec and it managed to shift better into 3rd, but still struggling to grab consistently, and flutters 2/3/2/3 a bit now. I feel like im making some progress, however. So... my question. Is it possible to adjust the band a bit tighter to compensate for, what i believe, is worn friction material on the band until i can get my hands on a replacement trans. Once i get the donor trans, im gonna rebuild this one, but if i can hold off another month or two, it would give me some time to recoup some money. Thanks for any and all help anyone may be able to give me.

Reply With Quote
Sponsored Links
Advertisement
 
  #2  
Old 03-23-2016, 04:18 PM
Frango100's Avatar
The beast from Brazil

My Jeep: 2004 4.7L WJ
 
Join Date: Dec 2009
Location: Brazil
Posts: 7,413
Thanks: 18
Thanked 382 Times in 369 Posts
Rep Power: 529604
Frango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond reputeFrango100 has a reputation beyond repute
Re: 42RE 2/3 shift issues

When you do the adjustment of the bands, you first apply a certain torque to the adjusting screw (so the band is positively engaged to the drum) and then back of some turns to set the desired distance. This should compensate for the wear of the bands. If the bands are worn that far that the friction material is gone, it will simply start slipping. Changing the adjustment could make the band to keep in contact with the drum and cause rapid wear of the lining. You could give it a try with a half turn for example and test again. You only need to do this with the front band, which is used for second gear (together with the rear clutch). This one can be adjusted with the transmission pan in place.
Do you have the feeling that the transmission slips in 2nd or 3rd? Because it seems more that something else is telling to change the gear. You are sure that the Throttle cable and shift cable are adjusted well?
__________________
Frank

JEEP Grand Cherokee 4.7 Lmtd 2004
HID 8000K in low and fog / Quad Squad member
KYB Gas-a-Just shocks / Pirelli Scorpion ATR 245/65/17 - Transgo reprogramming shiftkit.

VW Beetle 2.0 TSI 2013
My new toy
Reply With Quote
  #3  
Old 03-23-2016, 04:50 PM
Member
 
Join Date: Mar 2016
Posts: 14
Thanks: 2
Thanked 1 Time in 1 Post
Rep Power: 351
Blasimoto is on a distinguished road
Re: 42RE 2/3 shift issues

Thanks Frango. Thats what i was thinking too. its definitely 2 to 3rd shift. I adjusted it to spec the first time this morning. And it did engage at a lower rpm afterwards. So it makes me think the friction material is getting low. Half a turn is exactly what i was thinking myself. You mentioned something else seems off, and i felt the same way. Was thinking maybe the computer needs to relearn the shift patterns. CVI values may be off. Though it seems you need a special tool for that, which i dont have and its expensive. Ill give it a shot with half a turn in and let ya know how it works out. Thanks for the help, just wanted someone to chime in and confirm my suspicions.
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
42re transmission tiler607 Troubleshooting/Problems 2 12-19-2010 06:31 AM
42re only works for first 5 miles than goes out jeeperdave@comcast.net Engine Performance/Intake/Exhaust 3 10-01-2010 08:49 AM
42re works only for first 5 miles than slips jeeperdave@comcast.net Grand Cherokee - ZJ 3 09-29-2010 02:15 PM
Beef Up my 42RE Tranny caa0428 Troubleshooting/Problems 4 04-23-2010 09:09 PM

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 09:33 AM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Copyright 2012 - JeepGarage.Org
The Jeep Grand Cherokee Owners Community

JeepGarage.org is in no way associated with or endorsed by FCA US LLC. Chrysler, Dodge, Jeep, Ram, Mopar and SRT are registered trademarks of FCA US LLC.