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 09-23-2012, 11:36 AM
New Member
 
Join Date: Sep 2012
Posts: 2
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
ColinWB is on a distinguished road
overheating transmission. why ? what to do?

Hi. I do not understand why I'm getting TOH light coming on together with the 'O/D Off' on my AUTO change Jeep GC WJ.

Three years ago I replaced the thermostatic fan clutch so I reckon it's not that, also had a recent new rad thermostat. Transmission fluid appears clean and if anything over full (when cold, the fluid level is at the full/hot mark). Temp guage shows well below boiling point (100 degs C [I'm in Spain]) , slightly lower since fitting a new water pump (the other one was weeping and slowly losing coolant)

After driving at say 70-80 mph for a short while the warning lights come on and O/D disengages so the engine revs alarmingly...... sometimes for just a moment sometimes for a minute or two. Took the car for a long drive y'day and kept it below 60 mph without any problems. But today I went up into some mountains and kept in second without problems. After a long walk and time for the car to cool, when coming down the tracks with the engine obviously doing very little work, the lights came on. Why? It doesn't make sense.

I do not know when the fluid was changed last but the engineer who just repalced the water pump said it was OK.

The car is a WJ variant 8L4B. 5 cylinder dieasel 3124 cc. Engine is (unhappily) the Italian VM - type DVM73B. (I understand the Spanish Jeeps have the Italian engine as it's cheaper than the Chrysler built one !!!!)
Any help will be appreciated. I look forward to hearing from you.
__________________

__________________
Reply With Quote
  #2  
Old 09-23-2012, 03:49 PM
Frango100's Avatar
Premium Member

My Jeep: 2004 4.7L WJ
 
Join Date: Dec 2009
Location: Brazil
Posts: 5,065
Thanks: 9
Thanked 105 Times in 98 Posts
Rep Power: 526058
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: overheating transmission. why ? what to do?

Don't know which transmission is installed on your jeep, but when the level shows full/hot when cold, that is already not good. A too full transmission will form foaming of the fluid and that can cause all kind of strange behaviour. I would start by draining some fluid until its at the right level and see what it does.
__________________

__________________
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 10-08-2012, 07:40 AM
New Member
 
Join Date: Sep 2012
Posts: 2
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
ColinWB is on a distinguished road
Re: overheating transmission. why ? what to do?

Thanks, good point. Will get it looked at again.
__________________
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
Transmission Overheating 2011 Patriot goobie1 Compass and Patriot 4 05-29-2013 08:14 AM
2000 WJ 4.7l Overheating Jeeper2000 Troubleshooting/Problems Discussion 56 08-02-2012 09:31 AM
Overheating in the cold madherm Grand Cherokee - WK2 - 5 01-03-2012 11:37 PM
Engine overheating wkjeepgirl86 Engine Performance/Intake/Exhaust 9 04-04-2011 09:03 PM
Overheating :( caileighpaige Engine Performance/Intake/Exhaust 16 08-20-2010 03:09 PM

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 03:49 AM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Copyright 2012 - JeepGarage.Org
The Jeep Grand Cherokee Owners Community

JeepGarage.org is in no way associated with or endorsed by Chrysler Group LLC.