Rear main seal leaking

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Tukkr

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I need to replace my rear main seal because its starting to leak (nowadays I find a small puddle each morning).

I have looked on rockauto.com and found the following part no. GM GENUINE 12639250

Is this the correct part? (could not find it under my vehicle in rockauto) and should I replace other stuff while my mechanic is at it? Just making sure because I have to order everything from the States.

Thanks!

Shopping list based upon comments (via rockauto):

1x GM GENUINE - crankshaft main bearing - part no. 12639250 ($58,00)
1x FEL-PRO - oil pan gasket - part no. OS30693R ($38,00)
1x MELLING - oil pump pickup tube - part no. 324S ($85,00)
1x GM GENUINE - transmission mount - part no. 15113134 ($47,00)
1x GM GENUINE - torque converter shaft seal - part no. 24202535 ($5,00)
1x FEL-PRO - oil cooler gasket - part no. 72462 ($5,00)
1x FEL-PRO - oil pump pickup tube o-ring - part no. 72401 ($2,00)
1x MAHLE - oil pump pickup tube gasket - part no. B32790 ($2,00)
1x MELLING - oil pump pickup tube bracket - part no. ($19,00)

Don't know however if I have the quantities correct! please let me know :)

kr,
Nick20210922_113704.jpg
 
Last edited:

91RS

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I do believe that is correct. You definitely want the whole housing that comes with the new gasket and rear main seal itself. I would go ahead and do an oil pan gasket at the same time by the looks of it.
 

mattbta

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Need mine done, too. I have one of these in the glovebox waiting to go in. Figured while the trans is out, might as well.

 

Joseph Garcia

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I need to replace my rear main seal because its starting to leak (nowadays I find a small puddle each morning).

I have looked on rockauto.com and found the following part no. GM GENUINE 12639250

Is this the correct part? (could not find it under my vehicle in rockauto) and should I replace other stuff while my mechanic is at it? Just making sure because I have to order everything from the States.

Thanks!

kr,
NickView attachment 351027
If you want to be sure, post the last 8 digits of your VIN, and @915_Tahoe will provide you with the correct part number. As @91RS stated, "You definitely want the whole housing that comes with the new gasket and rear main seal itself".
 

Mudsport96

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Third on doing the oring while there, and i would do the block off plate/ oil cooler adapter gasket as well. The father in law paid to have his rear main done to stop a leak, still had the mess in the driveway.
Ended up being to the block off plate. Five dollar gasket you can do in a driveway in 5 minutes cost him 300 at the shop to fix a problem he didn't have.
 

OR VietVet

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Oil and filter of course, pickup tube o-ring, oil pan gasket and make sure to clean out or replace the oil pickup tube while apart. Complete rear main seal assembly and I did the torque converter seal when apart. Definitely the oil cooler lines plate/block off. If is easy to get to while apart, do the oil sender switch. Check the transmission mount and replace as needed.
 

915_Tahoe

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Cr/Shf RR oils seal Housing with gasket and seal
Gm#12639250 $83.93

Rear main seal
Gm#89060436 $30.65

Rear housing gasket
Gm#12639249 $30.62

Oil pan gasket
Gm#12612350 $49.73

Pickup tube seal
Gm#12584922 $9.47

Side cover gasket without engine cooler
Gm12611384 $4.79
 

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