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Re: AWD Astro
I also have had issues on my 2002 Astro AWD, after trying many transfer case oil changes I found out from Mercury Marine ( I am a boat mechanic) that many race car drivers use the Mercury Marine hi Perf gear lube in their differentials. That is the blue-ish gear lube. I put that in my front and rear diffs and transfercase and have not had an issue since.
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