Re: Differential Oil Change - How the Heck?!

Posted by Ragtime Kid On 2015/10/2 14:38:59

Thanks, JW! I used Stalube SAE-140 GL-4 in the newly rebuilt transmission per the rebuilder's advice.

I figured GL-5 standard didn't exist when the car was made so GL-4 would probably not hurt anything in the diff but as long as there are no "yellow metals" in there, I will take your advice and use GL-5 for the diff.

The book does specify SAE90 for the diff year-round. wouldn't the 85-140 be too thick at operating temperature?