rear differential pinion seal - finally fixed

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Cadillac CTS First Generation Forum - 2003 - 2007 Discussion, rear differential pinion seal - finally fixed in Cadillac CTS Coupe, Sport Sedan and Sport Wagon Forums; about one month ago I asked about how to replace rear differential pinion seal at 04 CTS. Now finally I ...
  1. #1
    icaddy is offline Cadillac Owners Fanatic
    Join Date
    Sep 2012

    rear differential pinion seal - finally fixed

    about one month ago I asked about how to replace rear differential pinion seal at 04 CTS. Now finally I fixed it. I appreciate for the advices from you guys. However, you dont have to make anything on pinion flange or nut, as the part you will get is a kit including flange, nut, and seal. The most important thing to install the pinion seal is to tight the pinion nut to 181 ft-lb.

    The new parts are also different from the old ones. You have to figure out what part number you need. There are different designs on rear differential. You have to go underneath the car to find a casting number on the housing which will determine your part number.

    if anyone needs some help on how to replace it, just shoot a email to applejuice.roma at gmail dot com.

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  3. #2
    pghcts is offline Cadillac Owners Member
    Automobile(s): 2003 CTS
    Join Date
    Sep 2014

    Re: rear differential pinion seal - finally fixed

    I have an 03 CTS, and searching for "Differential Pinion Seal - 2003 Cadillac CTS (88996592)" the part comes up as "Discontinued Part". Is there a replacement part? Is this the part number you used? You mentioned a kit, but I only found the seal itself. What is the kit part number?

    Thanks for your help!

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