Truetrac issue!!!

[07F150OAKLEY]

Originally Posted by 4.6 Punisher Eaton, the company who makes the limited slip, says non-synthetic oil. The guy you always buy from, who had no hand in designing the True-Trac says the other. I think I would believe what Eaton says. First of all I really don't feel like taking the rear end in pieces again cuz last time I put 80w90 in mine....a week l8er I had 2 change all the bearings in the rear end($$$$ out the window)!!!And ford keeps telling me NOT 2 put 80w90 for that exact reason and from what I can understand the bearings aren't the same depending on witch rear end u have and I'm trying to find out is if it's bad 4 it and what difference does it make?!!!! I'll give em' a call on Monday see what they say and if 80w90 or non synthetic is an obligation or recommendation!!!!!

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[AAK625]

OK, I've been running some sort of Royal Purple crap in my TrueTrac since March. I've put at least 800 miles on it since then. I only recently started to have slight chatter.

I don't know what to do. The shop guy swears by it, Ford is clueless, and Eaton says never use Synthetic.

[Klitch]

Originally Posted by AAK625

OK, I've been running some sort of Royal Purple crap in my TrueTrac since March. I've put at least 800 miles on it since then. I only recently started to have slight chatter.

I don't know what to do. The shop guy swears by it, Ford is clueless, and Eaton says never use Synthetic.

i think your last 5 words is the way i would go.

as a guy who plays with bearings every day, that go through more turmoil, neglect, and abuse, let alone retarded thought processes, i would disregard the yahoo who jumped up and down about a bearing going down the tubes because of a swap of oil type/weight.

just do yourself a favor, follow the aftermarket carriers instructions, a bearing will not magically explode itself because you changed oil... if its lubed, it will last. now if you make a drastic change in oil weight, yeah i could understand that.

[97XL]

All I can say is listen to Eaton, they make the trutrac not Ford. When I get home I'll post the 800# I got for Eaton trutrac dept. Call them, guy I spoke to was Barney. He told me not to run synth and once I put 80w90 in it all the noise went away.