How much additive does my rear differential need?

1989 CHEVROLET 2500
100 MILES • 5.0L • V8 • 4WD • AUTOMATIC
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JETLAND
  • MEMBER
  • 1 POST
I have a slip differential that requires the additive. My question is how much of the additive do I put in the rear differential before I add the gear oil?
Jun 13, 2021 at 7:14 PM
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JACOBANDNICKOLAS
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 110,190 POSTS
Hi,

Do you know if it is a G80 limited slip? My manual indicates additives are not to be used. Take a look at the attachment below.

Let me know if this is what you have. Everything that is a limited-slip locking axle is saying the same thing as below.

Take care,

Joe

See pic below.
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Jun 13, 2021 at 10:11 PM
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