2000 Grand Cherokee Transmission Problems - JeepForum.com

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post #1 of 7 Old 05-06-2005, 11:18 PM Thread Starter
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2000 Grand Cherokee Transmission Problems


I have a 2000 Grand Cherokee (WJ) and I am trying to figure out what model of transmission I have. The reason is because I need to change the fluid and I want to drop the pan and replace the filter. The Jeep has 85,000 miles on it and is used mostly for my girlfriends commute to work, round trip 30 miles. I am a fellow Jeeper. I started with a 77 CJ5 as my first car when I was 16, rebuilt the tranny back then with an old blind guy that knew everything there was to know about them.

Anyway, a few days ago my girlfriend started noticing some "slipping" in the tranny. She said it clunked into 2nd or 3rd gear, not hard, but made a sound you don't normally hear. I confirmed this last night coming back from Cinqo de mio, forgive my bad Mexican grammer.

Sure enough when you take off from a stop sign at a normal chop, and keep it around 20 mph, it clunked into what felt like 2nd or 3rd. Not very loud or hard, but enough to be a problem.

I have a Haynes manual for this thing but I can't find anywhere what model the transmission is. I went to Autozone tonight and they could not tell me, either it was a 45rfe or not. And the tranny fluid was for a 45rfe or not. A lot of help they were.

So this is what I need from you guys out there in Jeep land:

1. Help me determine what model the tranny is.
2. What type of fluid do I need and how much is required when I drop the pan?
3. Should I add any other additives to this?

Also, could the bands be loose or causing this problem? Again, the Jeep has about 85,000 miles on it and I don't think the fluid has ever been changed, if it has it was flushed about 40,000 miles ago.

How do I get all the fluid out of the system? I know not all of it comes out when you drop the pan, so how is this done other than flushing?

I have a local Jeep dealership in my town so I can get the parts pretty quick if need be from them.

Thanks in advance for all your help.


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post #2 of 7 Old 05-06-2005, 11:49 PM Thread Starter
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I forgot to mention, this also is a 2WD and has the 4.0 inline 6.


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post #3 of 7 Old 05-07-2005, 12:17 AM
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1)Your transmission model is "42re"

2)You should use ATF+4 fluid which is only available at the stealership. Do not use use ATF+2 or ATF+3 to top off vehicles that have ATF+4 fluid.

3)If you drop the pan and replace the filter I would put atleast 5 quart, check the dipstick to see if you require more fluid.

4)I've never added any additives in my tranny so I can't help you on that but others here on the forum might be able to give some advice.

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post #4 of 7 Old 05-07-2005, 08:15 AM Thread Starter
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Thanks for the reply. I hear ya, stealership. I will call them now.

I will let you know what I find.

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post #5 of 7 Old 06-06-2005, 02:44 PM Thread Starter
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Does anyone have any idea what size bit I need to take off the tranny filter? Is it Torx or Star or are they the same? I alway thought they were different, and if I can get away with just buying the one size I need instead of a whole set, that will save me some money!

Thanks for the help,
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post #6 of 7 Old 06-06-2005, 02:55 PM
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You are going to need about 7 quarts of ATF-4.Five will not be enough.I recently did mine.I cannot recall what size the filter bolts were.No additives required.
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post #7 of 7 Old 06-06-2005, 04:42 PM
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I can't remember if the WJ 42RE was the same as the ZJ 42 RE, (I've had both) but I believe it's a T-25 Torx. If it's not that it's a T-20. You can get a whole set up to T-50's at Harbor frieght tools for about $10 and you'll be able to use it for lots of things.

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