rear end fluid
TECH Resident
Joined: Jan 2002
Posts: 877
Likes: 55
From: Poway, Ca. where GOD and the sun always shines
Re: rear end fluid First let me mention that I am not an expert or an autority on anything automotive. I just had my 3.23's swapped out to 3.73's and here are the recommendations that the pro shop gave me.
Use 85W-140 "Dino" oil, no synthetic for Eaton, or Zexel-Torson clutch type posi, they claim that the sythetic fluid will scorch the clutch plates.
You can use "Synthetic" gear oil again 85W-140 with the Auburn unit, or any other spring posi.
Also add 4 oz. of limited slip lube GM # 1052358.
The reasoning they gave me for the use of thicker oil, is that the molicules of the thicker oil, are denser, and disapate heat much better than the 75W-90 weight GM recommends.
Hope this helps you out in some way.
SteveC <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />
Use 85W-140 "Dino" oil, no synthetic for Eaton, or Zexel-Torson clutch type posi, they claim that the sythetic fluid will scorch the clutch plates.
You can use "Synthetic" gear oil again 85W-140 with the Auburn unit, or any other spring posi.
Also add 4 oz. of limited slip lube GM # 1052358.
The reasoning they gave me for the use of thicker oil, is that the molicules of the thicker oil, are denser, and disapate heat much better than the 75W-90 weight GM recommends.
Hope this helps you out in some way.
SteveC <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />
