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Thread: my first posi fluid change
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09-01-2010 #1
my first posi fluid change
I've got a 8.5" gm posi. I've got synthetic gear oil and 4 oz of limited slip addititive. Two questions:
1. Should I be using synthetic?
2. Do I use all the additive?
thanks guys
Scott
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Scott
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09-01-2010 #21.) No.
I just recently had an 8.5 built by a pro for my Tempest with a new Eaton posi, the builder specified that no synthetic gear oil be used.
2.) Yes.Bart F.
'64 Tempest - LS3/4L70E - Grandma's Poor-Touring car'64 GTO - 455 HO/TH400 - Ex-bracket racer, street bruiser'02 WS6 convert - LS1/4L60E - Pure stock, pure pleasure
09-01-2010 #3I've been using Amsoil synthetic oil in most of the rear ends that I have built over the last 13 years with no problems at all. If you got the GM additive then use it. If you got something else then take it back and get the GM additive.
'69 RS/SS396 pro street/427/4spd/9"
http://rides.webshots.com/album/576443881hfGXxd
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09-01-2010 #4