Re: 8 3/4 Diff Gear Lube
[Re: ahy]
#1690209
10/25/14 01:00 AM
10/25/14 01:00 AM
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Joined: Feb 2003
Posts: 1,306 Laveen, Arizona
GTSDart340
pro stock
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pro stock
Joined: Feb 2003
Posts: 1,306
Laveen, Arizona
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I just had mine give through this year. I put 80-90 in it with the LS additive. No issues so far!
1949 International KB-2 "Mater" - 302/T5
1968 Dodge Dart GTS "The Drat" - 340/727
2006 Dodge Magnum R/T - Hemi
2016 Dodge Durango Limited - 3.6
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Re: 8 3/4 Diff Gear Lube
[Re: markfh52]
#1690210
10/25/14 01:05 AM
10/25/14 01:05 AM
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Joined: Nov 2007
Posts: 21,823 Kirkland, Washington
Pacnorthcuda
Too Many Posts
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Too Many Posts
Joined: Nov 2007
Posts: 21,823
Kirkland, Washington
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Quote:
What gear lube would be best for the 8 3/4 posi diff. I know there's a limited slip additive that needs to be used but I was checking out Castrol 75w-90 synthetic limited slip lube. Can that be used or is there a better alternative. Thanks
Your choice would be fine. For the additive go to a Ford dealer and buy it, it's the original formula MOPAR used to use. If your ""posi"" is a cone type the additive you choose really doesn't matter, if it's a power lock clutch unit you want to feed it the best.
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