I am also about to change the rear end oil since my gears are new and just through the break in period( with dino oil) should I go with Dino again or switch to Syn?? i
in any case I will still be using the GM limited slip additive.

Thanks!

 

Synth is fine for a stock posi.

 

i use valvoline synpower with limited slip additive, works great for me, kinda expensive though, o well, it dont take much!