Reverse problems only in the winter ? - Jeep Garage - Jeep Forum

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

Reply
 
Thread Tools Display Modes
 
  #1  
Old 06-16-2015, 07:11 AM
b2jgc's Avatar
Member
 
Join Date: May 2014
Posts: 23
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 1164
b2jgc is on a distinguished road
Reverse problems only in the winter ?

Hi all
So I have had this issue with my V8 WJ each winter. As soon as it gets cold here in Aus my WJ is very slow or wont select reverse unless i rev it when it slams in. starts ok from cold its only after warmed up. All the usual stuff checked, new fluid and filters ( genuine parts) no codes etc. This has happened each winter for the last few years. As soon as it gets warm outside it goes away and i have a trouble free summer. Any idears would be great thanks.


Jeep not just a car, a way of life. (sponsored by snap on)

Reply With Quote
Sponsored Links
Advertisement
 
  #2  
Old 06-16-2015, 08:54 AM
Frango100's Avatar
The beast from Brazil

My Jeep: 2004 4.7L WJ
 
Join Date: Dec 2009
Location: Brazil
Posts: 7,614
Thanks: 23
Thanked 423 Times in 408 Posts
Rep Power: 529934
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: Reverse problems only in the winter ?

Never heard of this problem before. This problem only happens when selecting reverse when the transmission is hot (and cold outside), but not when selecting D?
To know if the problem is control (solenoid) related, you could do the following test: first the transmission must be at operating temperature, and now you remove the transmission control relay from the PDC under the hood. The transmission goes into limp mode, so now you will have manual gear selections, all done via the manual valve in the valve body. When you now select R, is it still slow in applying reverse, or does it go directly? If its still slow, i would first do a check of the rigging of the shift cable. If that seems to be ok, we have to see further.
When you remove the transmission control relay, the check engine light will come on and a DTC will be set. You will have to errase the PCM memory after this test.
__________________
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 07-04-2015, 07:18 PM
frenchdragon's Avatar
Member
My Jeep: 2000 4.0L WJ
 
Join Date: Jul 2015
Location: Manlius, NY
Posts: 33
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 759
frenchdragon is on a distinguished road
Re: Reverse problems only in the winter ?

I have the same problem with my '00 WJ (175K) and know the answer to this. The o-rings in the transmission are getting hard and when it's cold, don't want to seal until they warm up.

Here's what I do; on initial start-up, shift to neutral and give the transmission a moment to pressurize. Remember the pump doesn't run in Park. Depending on temperature, I give it about 1 to 2 minutes for the fluid to circulate. Then when you shift to reverse or drive, it engages normally. If it slips, give it a little longer.

This has worked for me for 2 years now. I hope this helps you.
Reply With Quote
Sponsored Links
Advertisement
 
  #4  
Old 07-04-2015, 08:41 PM
Frango100's Avatar
The beast from Brazil

My Jeep: 2004 4.7L WJ
 
Join Date: Dec 2009
Location: Brazil
Posts: 7,614
Thanks: 23
Thanked 423 Times in 408 Posts
Rep Power: 529934
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: Reverse problems only in the winter ?

Quote:
Originally Posted by frenchdragon View Post
I have the same problem with my '00 WJ (175K) and know the answer to this. The o-rings in the transmission are getting hard and when it's cold, don't want to seal until they warm up.

Here's what I do; on initial start-up, shift to neutral and give the transmission a moment to pressurize. Remember the pump doesn't run in Park. Depending on temperature, I give it about 1 to 2 minutes for the fluid to circulate. Then when you shift to reverse or drive, it engages normally. If it slips, give it a little longer.

This has worked for me for 2 years now. I hope this helps you.
So your problem is different, because the OP doesn´t have the problem with the fluid cold, but when hot. (and outside temp cold)
Your statement that the pump doesn´t run when in Park is wrong, the pump is directly connected to the torque converter hub and the inner and outer gears are rotating as soon as the torque converter rotates, ie the engine runs. What is true, is that the torque converter will not fill when in Park, but it does when in Neutral.
The problem you described, is that fluid drains out of the torque converter. The torque converter is a fluid coupling and can only transfer torque when its properly filled with fluid. Your problem is most probably the torque converter drainback valve which doesn´t close properly, causing the slow drainage of the torque converter fluid. You will have to run some time in Neutral to fill the torque converter up and being able to drive away.
This is valid for your (42RE) transmission. The 5-45RFE (which the OP has) is not like that, since the torque converter already fills up in Park. It can also happen that the torque converter fluid drains away, but 5 seconds in Park should be enough to fill the torque converter. On the 5-45RFE this problem is caused by the return filter check valve.
__________________
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
  #5  
Old 07-05-2015, 05:24 AM
b2jgc's Avatar
Member
 
Join Date: May 2014
Posts: 23
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 1164
b2jgc is on a distinguished road
Re: Reverse problems only in the winter ?

Hey guys thanks for the reply. Frango is correct my problem only happens when it's cold outside and the car warms up. From cold it's never a problem. I think it's the valve pack and I'm going got replace it soon. Cheers Jon


Jeep not just a car, a way of life. (sponsored by snap on)
Reply With Quote
  #6  
Old 07-05-2015, 08:26 AM
frenchdragon's Avatar
Member
My Jeep: 2000 4.0L WJ
 
Join Date: Jul 2015
Location: Manlius, NY
Posts: 33
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 759
frenchdragon is on a distinguished road
Re: Reverse problems only in the winter ?

Okay, Frango. I bow to better knowledge then I've gotten before. My discription was how it was explained to me by a transmission guy in a reputable local shop. I didn't pay attention to the fact that Jon's problem was the opposite of mine, anyway. As my Grandpa said "Any day you haven't learned something is a day wasted."

What do I know about the 42re or 5-45rfe anyway? I'm a GM man and I'm familiar with the THM 350 and THM 700R4.

Thanks for setting me straight.
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
14 GC Summit, Problems & Problems w/ Dealer VooDooD Trouble Shooting/Problems/Service 24 07-14-2014 05:52 PM
Brakes squeal only in reverse mistadobalina Trouble Shooting/Problems/Service 1 12-01-2012 06:47 PM
2005 5.7 transmision problems only 1-2 Jarek5_7 Troubleshooting/Problems 14 07-11-2012 12:47 PM
What CITY (only) gas mileage are you getting with your 2011 Grand Cherokee? (V8 only) justin1569 Grand Cherokee - WK2 - 10 01-24-2011 11:04 PM
LED Reverse Lights Installed... Frankie Audio, Video, Navigation & Electronic Modifications 16 01-24-2010 03:33 PM

» Premium Vendor Showcase
Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 09:06 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.