Rear differential leak again - Page 4

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Cadillac STS Forum - 2005 through 2012 Discussion, Rear differential leak again in Past Cadillac Vehicle Discussion; I think you are probably alright if the car has gone that log without trouble, but then again, if you ...
  1. #46
    rb92gt's Avatar
    rb92gt is offline Cadillac Owners Fanatic
    Automobile(s): 2006 STS V8 Lux, 2011 Escalade EXT Prem
    Join Date
    Aug 2006
    Summerland Key, FL
    Thread Starter

    Re: Rear differential leak again

    I think you are probably alright if the car has gone that log without trouble, but then again, if you did not own it, you can't be sure if it has had any problems or not. I just got my car back a few days ago from the Cadi dealer, replaced the entire rear diff this time. I would estimate the cost for an entire rear diff is around $3K. The carrier (housing) itself is $1K, not including any labor or additional parts. I think the STS is an awesome car, you can have problems with any car... yes even Mercedes, BMW, Lexus etc. I would highly recommend though that you find a cadillac certified car, mine was when I bought it last year and my warranty is good until 2012 or 100K miles, whichever comes first... that warranty is even better than what I would have received if I would have bought a brand new 2006 STS off the lot the day I bought the car.

  2. #47
    aliskerov is offline Cadillac Owners Fanatic
    Automobile(s): 2005 Cadillac STS
    Join Date
    Sep 2011

    Re: Rear differential leak again

    Alright, well, I looked under my car yesterday and realized that there is an oil streak down the side of my differential and oil periodically drips down from it. Seems like I'm in the same boat. I'm hoping I can hold out until warmer days to do this repair. A few questions though: has anyone here tried tightening the bolts up a bit? That's the first thing I was going to try. Secondly, from the countless posts on this topic, it seems that the gasket between the differential casing and the cap is the weakest link. It also seems like the replacements supplied by the dealer are no good. Does anyone here know of a good aftermarket gasket or if there is any reason NOT to make your own with the red RTV stuff?

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