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Old 07-25-2017, 12:10 PM   #2
Scoutboy74
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Join Date: Apr 2008
Member Number: 453
Location: Daze Crick, Jefferson
Posts: 3,773
Default Re: Transfer case popping out of 2-hi

I'll get right to the point. That unit needs to come down for a rebuild. I don't really see any bandaid approach having a lasting, positive effect for you. That includes a fluid change. And when it comes to fluid, what you want to put in there is SAE 90wt GL-1 mineral oil, also known in some circles as "tractor oil". A suitable substitute if you can't find the above, is single viscosity or straight 50wt racing motor oil. You should not use 80-90wt GL-5 gear oil in the t-case. Save that for the axle diffs.
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