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Changing the Transmission fluid

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Old 05-02-2011, 01:50 PM
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theres a fill plug and drain plug on the TC facing toward the rear axle. you need a 31mm(i think socket to remove em.
Old 10-20-2021, 12:47 PM
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No need for new thread here I don't think...just wanted to chime in.

2000 XJ 4.0L with jet black transmission fluid. Drained the pan and added new to meet the dipstick indications. Going to put 1000 or so miles on that fluid then drop the pan, replace filter, add new fluid. Haven't got to the transfer case yet but will. Using Castrol Dex/Merc fluid.
Old 10-20-2021, 01:09 PM
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Originally Posted by 2000headssuck
No need for new thread here I don't think...just wanted to chime in.

2000 XJ 4.0L with jet black transmission fluid. Drained the pan and added new to meet the dipstick indications. Going to put 1000 or so miles on that fluid then drop the pan, replace filter, add new fluid. Haven't got to the transfer case yet but will. Using Castrol Dex/Merc fluid.
Not a filter in the tranny but a screen. Unless your pan is leaking and you want to put in a new gasket just drain it again from the pan and refill.
Little tip on the transfer case. Remove the fill plug first.
Just in case. LOL.
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doublechaz (10-21-2021)
Old 10-20-2021, 03:11 PM
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Originally Posted by Ralph77
Remove the fill plug first.
Never made that mistake myself. Nope, never.
Old 10-20-2021, 03:14 PM
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Originally Posted by lawsoncl
Never made that mistake myself. Nope, never.
LOL.
Old 10-20-2021, 05:13 PM
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Originally Posted by Ralph77
Not a filter in the tranny but a screen. Unless your pan is leaking and you want to put in a new gasket just drain it again from the pan and refill.
Little tip on the transfer case. Remove the fill plug first.
Just in case. LOL.
That's essentially what I did...poured some ATF-4 through the funnel (2 qts) after it drained fully and before replacing the plug and filling...obviously...til I saw red flowing out of the bottom and then filled with Castrol Transmax Dex/Merc. A mechanic at the Kost shop told me to go with Valvoline max life ATF but at this point I'm going with minimal intervention on this trans. Will be repeating this process after another 1k mi. ...granted my cylinder head replacement goes well.
Old 10-20-2021, 05:15 PM
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Originally Posted by lawsoncl
Never made that mistake myself. Nope, never.
Best advice I'v ever received lol...same goes for the oil pan
Old 10-20-2021, 08:31 PM
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Originally Posted by 2000headssuck
N. Using Castrol Dex/Merc fluid.
That is the correct fluid for an AW4 transmission, no matter what any auto parts store clerk tells you. Any brand (yes, even WalMart's brand) of Dex/MMerc.

Originally Posted by 2000headssuck
That's essentially what I did...poured some ATF-4 through the funnel (2 qts) .
ATF+4 is NOT correct for the AW4 transmission, no matter what any auto parts store clerk tells you.

Now you need to do a complete flush to get that stuff out of there. See my sig, #3.
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Old 10-20-2021, 09:11 PM
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Originally Posted by BlueRidgeMark
That is the correct fluid for an AW4 transmission, no matter what any auto parts store clerk tells you. Any brand (yes, even WalMart's brand) of Dex/MMerc.



ATF+4 is NOT correct for the AW4 transmission, no matter what any auto parts store clerk tells you.

Now you need to do a complete flush to get that stuff out of there. See my sig, #3.
I'll run it for 100 miles and do a "hot" trans fluid replacement...if something goes wrong I'll eat my words here...but that little bit of ATF+4 used to rinse, not flush, shouldn't impact anything seriously after filling with the Dex/Merc.
Old 10-20-2021, 11:22 PM
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Tell that to the many who have ruined their transmissions with ATF+4.
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Old 10-21-2021, 11:00 PM
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I bet ATF+4 isn't as bad as brake fluid in an auto trans.
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BlueRidgeMark (10-22-2021)
Old 10-22-2021, 09:23 AM
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Originally Posted by doublechaz
I bet ATF+4 isn't as bad as brake fluid in an auto trans.



Yeah, well, it's probably not as bad as coolant, either.
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Old 10-25-2021, 08:00 AM
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Originally Posted by BlueRidgeMark


Yeah, well, it's probably not as bad as coolant, either.
This reminds me of warning labels on every product.... lol...
I like reading some of them and laugh... because you know.. it's printed there because someone actually did it. LOL
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Old 10-25-2021, 06:06 PM
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Still no issues with rinsing my 2000 XJ 4.0 Auto after rinsing it with ATF 4 and then filling it with Castrol Dex / Merc. put 120 miles on it yesterday but after rebuilding the rear I'm too far gone to drop the pan tonight. Maybe I'll get to it tomorrow after I rebuild the front. Maybe not. Will keep you updated.
Old 10-25-2021, 06:08 PM
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Originally Posted by RocketMouse
This reminds me of warning labels on every product.... lol...
I like reading some of them and laugh... because you know.. it's printed there because someone actually did it. LOL
So funny! clap clap for you...who woulda thought putting ATF in and Automatic Transmission was so ridiculous. Just because I'm new to Cherokee forums doesn't mean I'm new to 4.0's ... have your fun.


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