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Transmission slipping

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Old 10-17-2014, 02:26 PM
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Default Transmission slipping

99 Cherokee 4.0

Started randomly "slipping" today. Give it gas, engine roars but no forward progress, eventually it comes back - but with a burning smell

Thoughts?
Old 10-17-2014, 03:00 PM
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Anybody?
Old 10-17-2014, 03:08 PM
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Mine was doing the same thing, check fluid levels (Running in Neutral)
Old 10-17-2014, 03:41 PM
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Slipping is usually caused by low fluid.
The burning smell is likely from the transmission also. It may need a drain and fill of fresh DexronIII Mercon because it probably overheated the fluid and has contaminants from the clutch pack slipping.
Old 10-17-2014, 03:44 PM
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Try searching a little. This issue has been well discussed......
Now many people might suggest a drain and fill, with Dex/Merc 3.
However the first thing to check is fluid level.
Old 10-17-2014, 03:57 PM
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Let's start another DEX/Merc/ATF thread!!!
Old 10-17-2014, 08:56 PM
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Originally Posted by Stabsthedrama
Let's start another DEX/Merc/ATF thread!!!
Here is the link so we don't have to. lol
https://www.cherokeeforum.com/f2/atf...mercon-200467/
Old 10-17-2014, 10:31 PM
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Transmission is done. Fluid can not fix burnt plates. If you plan on keeping the jeep rebuild it.
Old 10-17-2014, 10:50 PM
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Thanks to all for the suggestions. Taking her to the shop tomorrow for a diagnosis
Old 10-17-2014, 10:58 PM
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Easy way to tell is to drain the fluid. If its burnt and slipping then the tranny needs rebuilt.

True story. I had a van that slipped around left hand corners only. No joking. I check everything, had the fluid and filter changed, etc.... still slipped around left hand corners.
I drove it for a year like this. Just figured the tranny needed rebuilt. Finally one day I was in a bad mood. The slipping g transmission was wearing thin on me. Fluid level was fine, actually a bit overfull. Well I said screw it. I dumped 3 quarts in just for spite. NEVER slipped after that.. LOL. That was 20 + years ago.
Old 10-18-2014, 07:19 AM
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Originally Posted by holycaveman
Easy way to tell is to drain the fluid. If its burnt and slipping then the tranny needs rebuilt.

True story. I had a van that slipped around left hand corners only. No joking. I check everything, had the fluid and filter changed, etc.... still slipped around left hand corners.
I drove it for a year like this. Just figured the tranny needed rebuilt. Finally one day I was in a bad mood. The slipping g transmission was wearing thin on me. Fluid level was fine, actually a bit overfull. Well I said screw it. I dumped 3 quarts in just for spite. NEVER slipped after that.. LOL. That was 20 + years ago.
^ Wrong dipstick. LOL
Old 10-18-2014, 07:32 AM
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Originally Posted by holycaveman
Transmission is done. Fluid can not fix burnt plates. If you plan on keeping the jeep rebuild it.

No.

The transmission is NOT done. I have over 10k on mine since I had the same problem one evening. Fluid was BLACK like used engine oil, and smelled burnt.


I did a complete flush, and have been driving it with no problem since. That includes towing some heavy loads over rough roads.
Old 10-18-2014, 07:35 AM
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If he just pulls the dipstick and smells it he will be able to tell if it has a burnt smell to it, as we all know it surely must.

If it is shot I would suggest an AW4 from a JY with a warranty has to be cheaper than a rebuilt. But if it were mine I would rebuild it and put a really good torque converter an aftermarket one from Hugh's Performance in it also. I have used their converters in a lot of different apps (Race to 4W4's) for the last 30 yrs. and very hard to beat.
Old 10-18-2014, 07:45 AM
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I would not give up on the transmission either. The AW4 is a sturdy trans.
Likely the shop you brought to is going to advice a revision/rebuilt . Ignore that for now and first see how you go with a complete ATF replacing action. After all, a few gallons of ATF will cost a lot less $$ than a rebuilt.
Old 10-18-2014, 07:45 AM
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I would not give up on the transmission either. The AW4 is a sturdy trans.
Likely the shop you brought to is going to advice a revision/rebuilt . Ignore that for now and first see how you go with a complete ATF replacing action. After all, a few gallons of ATF will cost a lot less $$ than a rebuilt.


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