My son in-law just got the Grand Cher. And needs to know what lubricants go in the diff, T-Case and auto tranny. He says the diffs are posi and apparently need some sort of additive and same with the T-case need some sort of additive. What about the tranny Dex 3 or 4. Any advise please. <img src="/forums/images/graemlins/confused.gif" alt="" />


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