Can a coolant problem affect transmission? - JeepForum.com
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Unread 05-21-2008, 10:47 AM   #1
froyd79
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1997 XJ Cherokee 
 
Join Date: Mar 2007
Location: Altoona PA
Posts: 21
Can a coolant problem affect transmission?

I just picked up a 90xj. Guy told me it had overheated. I cant tell exactly what the problem is as I huave not checked into it too thouroghly. he dropped it off at my house all I noticed was the coolant expansion bottle had a hole in it, a little bit of smoke out the exhaust (was a chilly 40 degrees at night) and it seemed to have a miss in it, oil was fine. Needed changed but fine.

Anyway I Got into it today to move it while A tree is being removed from my yard and it took alot of gas to get it to move, Moved ok the other day when I pulled it out back. (e brake doesnt work, so that was not on) So I put it in 4lo and it went just like I remember my old 95xj going, so back into 2 wheel and it just felt VERY sluggish. Doesnt feel as if the tranny is bad almost as if the converter isnt locking up. So my question is would any airpockets in the closed cooling system or even overheated coolant cause it to act this way? As I was told it heats up rather quickly but the temp guage doesnt work for verification. I got a nice 3 day weekend for work coming up so alot of these minor yet intrusive inconveniences are about to get fixed!


Last edited by froyd79; 05-21-2008 at 11:06 AM..
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Unread 05-21-2008, 12:53 PM   #2
Rtbeebe
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1997 XJ Cherokee 
 
Join Date: Mar 2008
Location: Kentucky
Posts: 216
Sounds like you just need to run the heck out of it, get it to a good operating temp and then see how she acts. If its been sitting for awhile and not driven, it will be a bit sluggish for a few minutes. Your Tranny fluid runs through your radiator and has the potential to get contaminated if the radiator has an interior leak. Have you checked the Tranny fluid for antifreeze or a burned smell? I wouldn't worry unitl you get a chance to run it for a bit. Make sure the cooling system is full to avoid any further mishaps.
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Unread 05-21-2008, 01:12 PM   #3
Macnasty
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1993 YJ Wrangler 
 
Join Date: Nov 2007
Location: Bedford, In
Posts: 300
The old AW4 transmission is pretty tough, but I'm not saying that they can't break. What does the tranny fluid look like? Regardless, I would change ALL fluids, filters, and flush the cooling system since ownership has changed. I would bet that the filter and fluid hasn't been changed since 1990. Mine acted the same way when I bought it.
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Unread 05-21-2008, 01:42 PM   #4
sajeep4x4
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1989 XJ Cherokee 
 
Join Date: Apr 2008
Posts: 17
think about it.....your trans cooler lines generally run either into the radiator or on some that have larger coolers they run right in front of the radiator.so yes higher coolant temps means higher trans temps causing fluid to break down.
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Unread 05-21-2008, 11:57 PM   #5
froyd79
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1997 XJ Cherokee 
 
Join Date: Mar 2007
Location: Altoona PA
Posts: 21
Thanks Guys! I cant wait until this weekend to break it down. I have a 2nd xj with a good trans if needed. But like stated I have not really ever heard anything bad about the trans, motors or jeeps for that matter. Just electrical mainly. Sometimes I just get worried and go work 8 hours and dwell on it allll day haha! Thanks again and I hope to return the favor!
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