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Old 08-05-2015, 01:32 PM
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transfer case fluid change

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Old 01-17-2011, 12:55 PM
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Default transfer case fluid change

I am going to change the fluid in my transfer case soon is there anything special I should do? How much fluid will it take I could not find it in the owners manual. What brand fluid should I use? Also thinking about putting in a tcase saver what are your guys thoughts on those? Thanks
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Old 01-17-2011, 12:59 PM
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All a good idea.

T-case saver is an excellent idea. (some would say Requirement.)

ATF +4. Use the same fluid you put in your trans...

NP231 supposedly holds 2.5 pints...... Seems kinda low to me...... but hey.
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Old 01-17-2011, 01:04 PM
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Any idea where the best place to get a tcase saver is

Last edited by BigRedRam95; 01-17-2011 at 01:10 PM.
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Old 01-17-2011, 01:10 PM
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try here
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Old 01-17-2011, 03:06 PM
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I just did the fluid change out in my transfer case. It took about 1.5 quarts to get the fluid running out the fill hole.

Like said above, ATF+4 is what goes in the transfer case.
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Old 01-17-2011, 04:07 PM
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Definitely put in a Transfer Case Saver. It's cheap insurance to prevent this:

Quote:
Originally Posted by CappinHoff View Post


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Old 01-17-2011, 04:38 PM
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When I do mine, I buy about twice the fluid I need or more. I drain out the old fluid, then I put half of the new fluid in a squirtable container and squeeze that fluid into the t-case fill hole. It immediatly runs out the drain hole, but it runs out very dirty. I keep squirting it in until it runs out clean. I just think this gets rid of a lot of the dirty fluid that is still in the t-case that doesn't come out by just draining it. Then I close the drain plug and fill it up to capacity with the rest of the brand new fluid. I use ATF+4 in mine.
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Old 01-17-2011, 10:17 PM
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drivetrain.com is the only place i've seen the tcase saver. if anyone can find it anywhere else let me know. its damned expensive at drivetrain.

here's some tips -
1. the hex key is 10mm, don't use 3/8 inch it will strip out the center of the SOFT aluminum plug.
2. remove the FILL plug before removing the DRAIN plug. can you guess why. re-read #1.
3. it takes about a quart of ATF+4 to refill a 1500/231, maybe 1-1/4.
4. apply some liquid teflon or rtv to the drain and fill plug threads and just snug them when reinstall. don't torque them to 40 pounds. see #1.
5. the tapered squirt cap from a bottle of gear oil works good for squirting the oil in the fill hole of the t-case (and the diff). i always save them from the gear oil bottles.

Last edited by dhvaughan; 01-17-2011 at 10:20 PM.
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Old 01-17-2011, 10:49 PM
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Quote:
Originally Posted by dhvaughan View Post
drivetrain.com is the only place i've seen the tcase saver. if anyone can find it anywhere else let me know. its damned expensive at drivetrain.
I've hunted high and low and have never found another source. I can't even find a web site or reference information for the manufacture, Gilly's.

$50 ain't all that bad, really. I traded 'em a new TV cable for the one they broke on my truck and saved three bucks.
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