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Old 08-01-2008, 12:24 PM   #1
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Changing 42RLE ATF

Hello.

Tomorrow i will change the ATF in my 42RLE euto tranny because the poil pan has a leak. Is there something special I have to do?
Or do I only have to remove the oil pan screws and then the oil pan comes off?
I heard that one special screw needs some Loctite to lock and seal it. Is that right? Which scew is that?

Btw. Which fluid do I need for the TC? Also Mopar ATF+4?

Thanks!
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Old 08-01-2008, 12:29 PM   #2
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The TC doesn't require ATF+4, you can use less expensive ATF+3 or Dexron inside the TC. The TC is not fussy at all about its ATF like an automatic transmission is.

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Old 08-01-2008, 12:37 PM   #3
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Thanks Jerry.
I was a bit confused. My old 99 TJs manual said that the TC needs Dextron II or better. My 06 Manual says that I have to fill in only ATF+4.
I think I have one bottle of ATF+4 too much (bought 5 liters). If thatīs ok for the TC iīll use that. Then I donīt have to buy some other fluid.
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Old 08-01-2008, 12:56 PM   #4
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The manuals only specify a particular ATF for the t-case so it matches whatever the automatic transmission requires. If Jeep goes to a new transmission that requires a different ATF, you will see they will also change the ATF for the TC so the two will match. It's not that the TC requires the same ATF, they just keep them using the same ATF to reduce confusion.

And yes of course it is fine to use ATF+4 in the transfer case. I only mentioned the other ATFs since they are less expensive to buy and the TC doesn't actually require ATF+4.
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Old 08-01-2008, 06:39 PM   #5
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The Mopar atf isn't really that much more expensive if you get it from walmart where the Mopar +4 is like $4something a quart. Where you may gain is in the fact that the +4 is synthetic and will keep the transfer case running much cooler. If you have ever felt the tc after a long run you will know just how hot it really runs.

Donn
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Old 08-01-2008, 10:20 PM   #6
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never heard atf+4 is synthetic
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Old 08-01-2008, 10:26 PM   #7
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Quote:
Originally Posted by jpdocdave View Post
never heard atf+4 is synthetic
donīt know if mopar ATF+45 is synthetic. valvoline ATF+4 is it: http://www.valvoline.com/pages/produ...asp?product=63
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Old 08-02-2008, 12:08 AM   #8
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The tranny pan has drain plug... get the transmission up to operating temperature by driving it around for a while or putting the tranny in neutral for a while. After it's up to temp, shut it off and crawl under it with a drain pan. Take out the drain plug and let it pour out. Once done, take off the tranny pan to get the rest out and be sure to check for debris in the pan. Clean it up, install it with a new gasket(do not use RTV or silicon!) and then fill it back up.
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Old 08-02-2008, 12:15 AM   #9
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Once again. For the 42RLE there is no gasket available. This tranny has no drain plug.
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Old 08-02-2008, 09:50 AM   #10
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never heard atf+4 is synthetic
Read about it here http://www.centerforqa.com/
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Old 08-02-2008, 10:37 AM   #11
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Once again. For the 42RLE there is no gasket available. This tranny has no drain plug.
Sure there is. Try lube locker, they have the reusable one and it works fine.
here's a link.

http://www.lubelocker.com/products/catalog.html
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Old 08-02-2008, 08:10 PM   #12
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Thanks. But itīs too expensive to order only one cheap part in the US.
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Old 08-02-2008, 08:32 PM   #13
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Quote:
Originally Posted by jpdocdave View Post
never heard atf+4 is synthetic
I have bought quite a bit of ATF+4 since February (tranny swap, t-case drain & fill, plus repeat all that for due to a tranny leak) and I don't recall seeing any ATF+4 that wasn't synthetic. Last year, I had my wife's JGC ATF flushed last year and when I asked the shop manager why the ATF+4 was so expensive, he said it was because "they're all synthetic".
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Old 08-02-2008, 11:54 PM   #14
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Quote:
Originally Posted by nicolas-eric View Post
Once again. For the 42RLE there is no gasket available. This tranny has no drain plug.
Seriously? That is stupid.
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Old 08-11-2008, 07:44 PM   #15
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Once again. For the 42RLE there is no gasket available.
So what you really meant was that there isn't any available in Germany.

Quote:
Originally Posted by nicolas-eric View Post
Thanks. But itīs too expensive to order only one cheap part in the US.

Should of ordered that at the same time as your last big order from the US.

Did you ever find a deep tranny pan for your trans?

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