Rear main seal replacement?

Cadillac Forums | Help Us Help You | Advertise | Cadillac Parts | Cadillac News | Cadillac Classifieds

Cadillac Technical Archive | Cadillac Dealers | Cadillac Reviews | Cadillac Dealer Reviews | Cadillac Vendors is the premier Cadillac Forum on the internet. Registered Users do not see the above ads.
+ Reply to Thread
Results 1 to 2 of 2
V6: 3.0, 3.2 LA3, 3.6 LY7, 3.6 DI LLT Discussion, Rear main seal replacement? in Cadillac Engine Discussion; Last weekend I was told by a shop that my rear main engine seal is leaking and would need to ...
  1. #1
    GCTS1 is offline Cadillac Owners Member
    Join Date
    Aug 2012

    Rear main seal replacement?

    Last weekend I was told by a shop that my rear main engine seal is leaking and would need to be replaced. I was told that they would need to drop the transmission in order to access and replace that seal... Is this true? I know that on other vehicles the rear main seal can be replaced by removing the oil pan without having to remove the transmission.


    By the way I have a 2004 CTS with the 3.6L engine.

  2. Remove Advertisements

  3. #2
    calif phil is offline Cadillac Owners Enthusiast
    Automobile(s): 2014 ATS
    Join Date
    Jan 2013
    Modern vehicles have a one piece rear seal and you do need to drop the transmission to replace
    I would look at the valve covers to make sure what's leaking by the rear seal is not running down from above.

  4. Remove Advertisements
    Cadillac Forums

+ Reply to Thread

Quick Reply Quick Reply

Register Now

Please enter the name by which you would like to log-in and be known on this site.

Please enter a password for your user account. Note that passwords are case-sensitive.

Please enter a valid email address for yourself.

What Cadillac(s) do you own? (Or type NONE)

Please select your insurance company (Optional)

Your date of birth and age are displayed in several places on the forum. Only the administrator will have access to your date of birth should you choose to hide it via the privacy option below.


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.


Cadillac Posting Rules

  • You may post new threads
  • You may post replies
  • You may not post attachments
  • You may not edit your posts