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LS6 weird rear main seal

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Old Dec 10, 2025 | 07:18 PM
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Default LS6 weird rear main seal

Hey everyone, I'm resealing my LS6 while I have the motor out. I bought an OEM GM 12639250 rear cover. The very inner portion of the seal looked odd. It is more like a circular flap. It fit tight tho. Has anyone recently seen this? Or is it a bad seal?

I'm putting the motor in this weekend so I want to make sure it's correct. Because it's so easy to replace. (Heavy sarcasm)
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Old Dec 10, 2025 | 08:50 PM
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Kind of hard to tell what you're talking about without seeing it.
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Old Dec 11, 2025 | 10:35 AM
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Originally Posted by Ltngdrvr
Kind of hard to tell what you're talking about without seeing it.
I didn't take a pic before I installed it. I got another one to check. If it's the same seal then I'll just return it.
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Old Dec 11, 2025 | 11:23 AM
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https://www.michiganmotorsports.com/...DSDvoh0OoY8LRY
check this
And why didnt you just google it or go to a parts store and physical look at it instead of ordering one??
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Old Dec 11, 2025 | 12:40 PM
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Here's one
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