Rear Main Seal

[azmike]

I have a 2000 GMC Yukon 4x4, 5.3 Vortec. It has a real bad leak that my mechanic says is the rear main seal. He's estimating that it's about a $1,000 repair. Don't know how tricky this repair is so is this a job that I should have done at the dealership or stick with my regular guy? P.S. loosing about a quart a week.

 

[bottomline2000]

quote seems high for a non dealer quote, but you have to drop the transmission and remove the flex plate to replace the seal. I would think any mechanic worth his salt could handle it. cross shop a dealer and if the cost is the same send it to the dealer. most seem to knock this repair out when doing trans work..

 

[ccapehartusarmyINF.(ret)]

1000 bucks is hi the shop by my house charged me 450 years ago on my tahoe when my perents owned it and i think u can get away with dropping the drive shaft

 

[01ssreda4]

Drop both shafts, drop transfer case, drop tranny swap seals then put everything back. I consider this a two day job if working on jackstands by yourself.

 

[TheAutumnWind]

It is a pretty laborious repair. That does sound a little high though.

 

[ccapehartusarmyINF.(ret)]

id also confirm that it is infact the rear main seal is the problem
because i mite be wrong but isnt the sure fire way to tell that the rear main seal is bad is oil leaking into the bellhousing and if there isnt any oil in there then the seal is fine becuase ive heard that mechanics tend to use the rear main seal as there go to solution when diagnosing oil leaks or oil consumption they cant figure out

 

[treehan77]

My bell housing is bone dry when you look in the inspection cover. Dealer still said rear main after I poi Ted that out. He says it's slinging it up. Needless to say, small leak and I didnt have them fix it for 1000 bucks, I'll wait until I need a transmission.

 

[01ssreda4]

If its dry inside when you look through the inspection cover its not the rear main seal. If its above that then id vote cam position seal, valley plate seal, or oil psi sensor. Remember, leaks go down and back.

 

[treehan77]

If its dry inside when you look through the inspection cover its not the rear main seal. If its above that then id vote cam position seal, valley plate seal, or oil psi sensor. Remember, leaks go down and back.

Already did the oil pressure sending unit. When I clean it up, first place I see oil is inside starter bolt. Ideas?

 

[bottomline2000]

Already did the oil pressure sending unit. When I clean it up, first place I see oil is inside starter bolt. Ideas?

Only place that comes to mind would be the valve cover gasket leaking in the rear. Starter sits above the oil pan.

sent from my lollipop