Re: 1954 Packard rear end differential

Posted by 54packpac On 2024/5/21 18:37:06

Thank you everyone for your responses. To start, I plan on simply draining the gear oil and replacing with 2 quarts of Royal Purple Maxgear 85W-140 gear oil and 4 oz. of Bardahl gear oil stop leak and yellow teflon tape. The service manual mentions 4.25 pints of gear oil which translates to 2.125 quarts. The service manual also mentions checking the level but with what and how do you know? I was toying with MOPAR friction modifier as well. The fill hole and drain hole are pretty clear but what is the plug (red) in the upper left for? Thoughts are welcome.

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