- May 23, 2013
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over the weekend me and my dad who are both mechanically inclined, decided to throw 3.73's in my stang. its an 06 gt auto. the tear down was easy and nothing was damaged. car has 86k on it. we have all the special tools and goodies to properly complete the task. our first problem was that the pinion with stock thirty thousandth shim on it, would sit too far in the pumpkin and hit the carrier. so we took it all out and used the stock bearing with the center grinded out to get an idea of how big of shim we needed. so we went with no shim on the pinion and therefore the fitment seemed perfect. with everything in and the gear shimmed right(or what we thought was right accorinding to three different books) everything seemed to be perfect. so we get it all back together and fluid in it, let it run at idle with it on jacks for about ten minutes, got it off jacks and took it for a test drive, literally around the block no faster than 20 mph and right away we heard the infamous whining, and when i let off the gas it was kind of a clunking sound like once i let off the gas and the pressure wasnt there was just rattling and loos inside the rear end. so we said screw it and took it to a reputable mechanic. at first he said without doing anything but taking the cover off, said my clutch pack went bad...after getting on him he finally tears it all down and says the "oil slinger" a washer behind the bearing on the pinion wasnt there when we put it in?? i am on military leave and already passing my allowed leave 500 miles away. really need my car fixed and not getting any good knowledge it seems like. very frustrated so please any help is appreciaited. sorry its such a long story