Differential lube
Thread Starter
Instructor
Joined: Oct 2013
Posts: 122
Likes: 0
From: morgantwn wv
Differential lube
Hi guys
I had the rear end out of my 66 coupe and drained the gear oil in prep for a change. (Posi-traction) I'm really not sure what goes back in. Checked old posts and there many different opinions. I want to use the same stuff they used in 66...don't want to use any synthetic oil. Had bad experience with it and old cars. It appears A C delco 75W-90 was used. What is the correct mfg of the old oil and where do I find it. Thanks
P.S. Is the same for the tranny?
i
I had the rear end out of my 66 coupe and drained the gear oil in prep for a change. (Posi-traction) I'm really not sure what goes back in. Checked old posts and there many different opinions. I want to use the same stuff they used in 66...don't want to use any synthetic oil. Had bad experience with it and old cars. It appears A C delco 75W-90 was used. What is the correct mfg of the old oil and where do I find it. Thanks
P.S. Is the same for the tranny?
i
Melting Slicks
Joined: Jun 2012
Posts: 3,115
Likes: 196
From: Wilton Ca.
You can buy the correct lube at any Chevy dealership. You'll also need at least one and sometimes two bottles of posi additive. Afterwards find a parking lot and do some figure eights to get it mixed into the clutches. You want a tranny lube with GL-4, 75-90w should be fine.
Last edited by Gary's '66; Jun 17, 2014 at 12:58 AM.
Race Director
Joined: Apr 2005
Posts: 11,277
Likes: 2,139
From: Bowling Green, Kentucky
You can buy the correct lube at any Chevy dealership. You'll also need at least one and sometimes two bottles of posi additive. Afterwards find a parking lot and do some figure eights to get it mixed into the clutches. You want a tranny lube with GL-4, 75-90w should be fine.
http://www.parts123.com/parts123/yb....Z5Z50000050~~~
Also http://www.parts123.com/parts123/yb....Z5Z50000050~~~
You can probably buy similar products from NAPA, etc. but these are the GM ones.
Larry
Last edited by Powershift; Jun 17, 2014 at 10:52 AM.
