Re: New to the Group
I use the NAPA 90 weight mineral oil in the sm420 and recommend it for the ones I rebuild for people, I found the newer more slippery 90 weights can make for bad shifts with the 3rd and clutch gear synchros in my opinion. Runs about 15 bucks a gallon takes between 6-6.5 pints.
I dont think you can go wrong with any hypoid gear lube for GL-2 through 5 for the diff. If you have a clutch type limited slip or posi you will need friction modifier.
Steve
__________________
Steve Stock
Gig Harbor, Wa
1953 Chevrolet 3100
261 cu inch, SM420
Finished Cab off restoration
1964 GMC 1000
305 V6, SM 420
Restoration is now started, still looking for an oldsmobile style power steering pump
Last edited by tbucketnut; January 16th, 2020 at 03:43 PM.
|