quick question about diff friction additive...
 

i used a crappy advanced auto one last time.. this time i want to make sure i put something decent in there.. Now summit doesnt sell the GM brand one that is probably best to use, but they sell one that is made for ford clutch style diffs like the eaton i have... here is the link..http://www.summitracing.com/parts/CUR-99012/ ... just wondering of anybody has used this at all and if its the same as the GM stuff... im already ordering other stuff from summit so i figured id just throw this in there with it... they also have redline http://www.summitracing.com/parts/RED-80301/?rtype=10 , and ford racing http://www.summitracing.com/parts/RED-80301/?rtype=10 , are any of these better or worse for a 12 bolt with a eaton posi... just wondering... i could order the GM stuff at work tomorrow but prob wont see it for a couple days... thanks for any help

Get it from the pal, thats where I got my GM stuff, that or a dealer. Was at a dealer today and they had some on the shelf.

yea i can just get it from a dealer at work and have it delivered to the shop... one of the benies of working for a shop haha

Actually I've heard from sponsors that the Ford additive is the recommended additive for an Eaton posi for my 12 bolt.

The Napa near me carries both Ford and GM friction modifier.