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Old 01-10-2026, 06:28 PM
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kyle_blake kyle_blake is offline
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Join Date: Mar 2002
Location: Vancouver,BC,CAN
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Default Differential Fluid Change Quick Question 69 gto

Hi,

I have some synthetic 75w 90 Gear oil and want to change the fluid on my 10 BOLT Differential.

I've never opened it up before but it is not a "C-CLIP" version.

It was once identified by a PY member as:

>>Yes, your rearend is an Olds rearend. Well, it's actually a
>>corporate
>>rearend, in that it was used on Oldsmobiles, Pontiacs and Buicks
>>of the
>>same era. It's the 8.2 10-bolt.

My question is : do I just add one bottle of this ? There isn't any special mixing procedures?

Just put a bottle of gear oil in, then empty this in, then reset of gear oil to top of fill plug?

Then drive.

ACDELCO - 992694 - Differential Oil Additive
(pic in post )
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69 Gto, 390 posi gears,th400 w/jim hand converter/406 pontiac/#64 HEADS/ 10:1 compression/ 190 PSI with/ TRW 160 thou domes / hooker headers 1 7/8, PRW 1.5 rockers, 405 Crower Springs, Holley 750 vac with proform upgrade, Performer RPM on points / 284 H Single Pattern Crane