Transmission fluid type
CF Veteran

Joined: Jul 2012
Posts: 1,185
Likes: 5
From: Pahrump, NV
Year: 1996
Model: Cherokee
Engine: 4.0L
CF Veteran
Joined: May 2013
Posts: 1,056
Likes: 3
From: Washington, MO
Year: 2000
Model: Cherokee
Engine: 4.0
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CF Veteran




Joined: Nov 2010
Posts: 5,839
Likes: 116
From: In the middle of Minnesota!
Year: 1999
Model: Cherokee
Engine: 4.0
Use Dex/Merc III "compatible". Widely available.
Do NOT use ATF+4, no matter what they might tell you at the parts store. Chrysler issued a bulletin a while back stating that ATF+4 is fine for the AW4 transmission.
The truth is that some with the AW4 do not do well with this fluid; they experience "slippage".
Nobody has issues with Dex/Merc, which is the fluid recommended by the manufacturer of the transmission.
So don't mess with it. Why in the world would you take the chance when reasonable interval changes of Dex/Merc have stood the test of time in getting 200K-300k out of the AW4 transmission. Go Dex/Merc compatible and rest easy.
Do NOT use ATF+4, no matter what they might tell you at the parts store. Chrysler issued a bulletin a while back stating that ATF+4 is fine for the AW4 transmission.
The truth is that some with the AW4 do not do well with this fluid; they experience "slippage".
Nobody has issues with Dex/Merc, which is the fluid recommended by the manufacturer of the transmission.
So don't mess with it. Why in the world would you take the chance when reasonable interval changes of Dex/Merc have stood the test of time in getting 200K-300k out of the AW4 transmission. Go Dex/Merc compatible and rest easy.
Last edited by tjwalker; Sep 3, 2013 at 07:03 PM.
Senior Member
Joined: Aug 2011
Posts: 604
Likes: 1
From: California
Year: 1990
Model: Cherokee
Engine: 4.0 i6
Use Dex/Merc III "compatible". Widely available.
Do NOT use ATF+4, no matter what they might tell you at the parts store. Chrysler issued a bulletin a while back stating that ATF+4 is fine for the AW4 transmission.
The truth is that some with the AW4 do not do well with this fluid; they experience "slippage".
Nobody has issues with Dex/Merc, which is the fluid recommended by the manufacturer of the transmission.
So don't mess with it. Go Dex/Merc compatible and rest easy.
Do NOT use ATF+4, no matter what they might tell you at the parts store. Chrysler issued a bulletin a while back stating that ATF+4 is fine for the AW4 transmission.
The truth is that some with the AW4 do not do well with this fluid; they experience "slippage".
Nobody has issues with Dex/Merc, which is the fluid recommended by the manufacturer of the transmission.
So don't mess with it. Go Dex/Merc compatible and rest easy.
I use valvoline and haven't had a problem yet
Check fluid with transmission at operating temperature, sitting on level ground, engine idling, in Park.
CF Veteran

Joined: Mar 2010
Posts: 1,441
Likes: 9
From: Georgia
Year: 99 94
Model: Cherokee (XJ)
Engine: I6
I always use Dexron 3. DO NOT use ATF4. ATF4 is known to mess up AW4s
Drain 3 quarts from the pan and fill it with 3 quarts.
Run the transmission around to get it hot then check the level of the fluid with the transmission in gear and the e-brake on.
Drain 3 quarts from the pan and fill it with 3 quarts.
Run the transmission around to get it hot then check the level of the fluid with the transmission in gear and the e-brake on.


