They ****ed up your rear, end of story. It appears that you have a myriad of things that are not right. Might be something like not torquing the carrier caps down enough and everything moved around.

Who knows. But they need to step up. You may catch hell for opening it up.

Just got off the phone with them he said that he was being nice by putting the pinion seal in for free and that it wouldn't screw anything up. And that its the used parts and that hes built rears for 4000hp cars. He seems to think uts the used spider gears in the posi

Maybe when they replaced the seal they didnt set the right preload.
Lol and i build rears for 5000hp cars. What shop did the work?

- Justin

They removed it pinion nut with an impact and put it back on with an impact. But replacing a pinion seal wolnt mess anything up.
I provided all the parts all new except the eaton posi I bought which I bought lightly used off of deadtrend1. The shop had to swap the spiders out of the old one because the new one was the wrong spline. Hes saying the spider gears failed because they are used.

They used parts out of the known broken diff? And charged money for this service?

Wasn't it their idea to take the spiders out of your broken diff and install them in the one you bought from Tim?

- Justin

Yes and they had me call eaton to makesure it would work before they did it.

Just the spider gears nothing else. And yes they charged me $150 to swap the spider gears from the old posi to the new posi.

$400 and a 10 bolt

Not interested in your 10 bolt.

Dude, you got hosed. Cut your losses, save some bucks, then go somewhere that knows what the **** they are doing.

Called another shop and they want $900 to reset the gears and install new bearings. They seem to think the pinion bearing is shot from him swapping the pinion seal and putting the pinion nut back on with a gun...the 9in housing is slightly more then that so you can probably guess what route Im going...after the way the guy talked to me on the phone I realized it would just end up in a screaming match.

Does the $900 include all new internal parts?

Nope, bearing kit. Its a shop I trust, and hes ALWAYS expensive the reason I did not go to him in the first place. He said the pinion bearing is probably burnout from the other shop putting the pinion nut on with an impact gun and screwing up the bearing preload/crush collar.

You watched him put the nut on with a impact or did he tell you he did? Did he warn you not to use the old spider gears?

- Justin

Yes I was sitting in the waiting room watching thru the window