Differential failure due to wrong oil!
Thread Starter
Instructor
Joined: Aug 1999
Posts: 235
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From: Chandler AZ
Differential failure due to wrong oil!
I got the car back earlier this week from the shop that fitted my new 4.10. At first there was a little noise and this just got louder. The shop had put GM Syncromesh in the differential after talking to a local dealer. They confirmed again with the dealer as they were not convinced. After being assured this was correct, they used it, I dove it and the differential is now toast.
The dealer has taken responsibility and is covering the cost of repalcement. I am still without a car for another week though. :(
The dealer has taken responsibility and is covering the cost of repalcement. I am still without a car for another week though. :(
Thread Starter
Instructor
Joined: Aug 1999
Posts: 235
Likes: 0
From: Chandler AZ
Re: Differential failure due to wrong oil! (Trey395)
It started off as a rattle from the shifter, which got louder and LOUDER! It sounds like a metal rattle to start and turns in to a loud shreak. It was deafening inside the car and could also be heard very loudly outside the car.
Apparently, Synchromesh is only for the transmission, not the differential. You need a 90wt oil with positrac additive inthe rear.
I learnt this the hard way :sad:
Apparently, Synchromesh is only for the transmission, not the differential. You need a 90wt oil with positrac additive inthe rear.
I learnt this the hard way :sad:
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Re: Differential failure due to wrong oil! (ElanMike)
GM Synchromesh is used in the transmission, not in the rear. You're lucky the dealer is taking responsibility for this disaster. Best of luck
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Re: Differential failure due to wrong oil! (ElanMike)
:eek: What a disaster. Glad the dealer is taking care of the mistake.
Thread Starter
Instructor
Joined: Aug 1999
Posts: 235
Likes: 0
From: Chandler AZ
Re: Differential failure due to wrong oil! (ElanMike)
Just to update. Cartek is overnighting the parts to the dealer. they will get on fixing ht issue right away and will have the car for me early next week. It's nice to find a dealer who will stand behind their actions, even when it costs them over $600 and 2 days of labor. :yesnod:
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Re: Differential failure due to wrong oil! (ElanMike)
That's great. Who was the dealer down there? It's a bit far for me and my dealer is ok, but it's always nice to know of another good dealer around.
Le Mans Master
Joined: Nov 1999
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From: Imperial Beach CA
Re: Differential failure due to wrong oil! (MANNY)
Confused, doesn't the owners manual tell you what to use? I would think that the shop that put it in would know a bit more than that. :confused:
