Re: 1954 Packard rear end differential

Posted by kevinpackard On 2024/5/21 16:46:36
Quote:

humanpotatohybrid wrote:
Why use 85W140 instead of 90 weight?


I don't think it matters much if it's 75w-90 or 85w-140. I've done both in my car and am currently using 85w-140. I think the bigger issue is to make sure the gear oil is GL4/GL5 or HP rated. Otherwise the gears can have same major issues.

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