75w140 synthetic for the rear with no additive. you only need to put the whale oil in if you have a clutch type posi.
The reason I said to do the wires is because alot of times they will break when you pull them off to change the plugs.
A set of Taylors will get the job done and only cost $45.
01 ecsb 5.3 4x4 z71
Avalanche 17s and a pant load of miles
61 Corvette
350, 4 speed, 4.56's
32 Ford 4 door sedan
keeping it "stockish"
x2Originally Posted by straightaxle
the owners manual recommends 75/90w full synthetic for g80
'02 Silvy: Z71 EC Step Side 5.3L Nelson tuned
2013 GMC Acadia: SLT1 Carbon Black
1976 Corvette Stingray: Trying to save it, progress is slow.
^Ricky's Sweet PS Skilz
09/21/2010 02:31 <danger_ranger83> I'm not really worried about the looks...I want it to be fast and ugly...bc no one wants to get outrun by something ugly
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