How much gear oil and posi additive will I need to change the differential fluid? It is a Borg-Warner 9 bolt. Any problems with Mobil One gear oil?

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87 Formula 350 13.94@96.67
98 Z28 1LE 13.15@107.59
1LE Owners Association

 

1 bottle of posi additive, i buy 2 bottles of gear lube ,i never can get the bottle empty so it takes 2, fill it untill it runs out the fill hole.

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ICON Motorsports

1st & 3rd

 

Oh... and it smells wonderful too!

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1984 z28 w/ a 357 cu in. monster engine which is looking like the posterchild for Edelbrock with the exception of the Holley 750vac... all the suspension stuff... 9-bolt posi disk is in...

-=ICON Motorsports=-

 

The only problems with Mobil 1 are: 1) It's not AMSOIL; and 2) you have to use the posi additive.

Did I wait too long for your taste, ede?

I'm not sure of the capacity of a 9 bolt, but 2 quarts should do; 3 definately would and you'd have some around to add if needed later.

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82 Berlinetta, orig V-6 car, now w/86 LG4/TH700R. 2.93 limited slip. Cat-back from '91 GTA, Accel HEI SuperCoil. AMSOIL syn lubes bumper-to-bumper. Daily driver, work-in-progress (LG4 w/LB9 block, ZZ3 cam and intake, TBD heads, Hooker headers & y-pipe, 3" Catco cat).
57 Bel Air, my 1st car. 0.030 over 396, Weiand Action+, Edelbrock 1901 Q-Jet, Jacobs Omnipack, 1-3/4" headers, TH400 w/TCI Sat Night Special conv & Trans-Scat shift kit, 3.08 8.2" 10-bolt w/Powertrax, AMSOIL syn lubes bumper-to-bumper. Best 15.1 @ 5800' Bandimere. Daily driver while Camaro was being put together.