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post #1 of (permalink) Old 12-02-2002, 11:29 PM Thread Starter
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Do the t-case and auto tranny swap fluids?

Still saving for all the various things I'm going to do at the same time on the tranny, but meanwhile I've got this jug of ATF +4 sitting here that I could put in the transfer case. Are the tranny's and t-case's sealed off from each other, or do they swap fluids a bit?[img]images/graemlins/tongue.gif[/img]
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post #2 of (permalink) Old 12-03-2002, 06:10 AM
raminaredickson
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Re: Do the t-case and auto tranny swap fluids?

NO they do not swap fluids / there is a seal in the tranny to transfer case adapter / I personally run 10w motor oil in my transfer case / it has lasted 15 years of extreme wheeling after I rebiult it from bearing failure from useing tranny fluid / tranny fluid does not lube very good under hard use / under normal use its fine
post #3 of (permalink) Old 12-04-2002, 11:43 AM
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Re: Do the t-case and auto tranny swap fluids?

The newer t-cases such as the 231 and 241 are designed to run on ATF and I would not recommend running motor oil in them. However, some older t-cases such as the NP203 were designed to run on oil such as 10W-30 I believe.
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post #4 of (permalink) Old 12-13-2002, 05:50 PM
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Re: Do the t-case and auto tranny swap fluids?

AJMBLAZER- yes, both the transfer case & the auto tranny use ATF.

ATF+4 is recommended, as it supersedes ATF+3, with the added benefit of running cooler, foaming less, providing higher wear protection, and less viscous cold weather usage.

Use that jug of ATF+4 [img]images/graemlins/laugh.gif[/img] , and since you have a 231 transfer case, leave the engine oil where it belongs-in the engine.
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