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Old 10-26-2016, 05:10 PM   #1
85supersierra
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differential ID questions

I am trying to identify my rear diff. I know it is a 12 bolt GM truck rear but I am having trouble finding the correct pinion seal for it. The only casting numbers I have found are "GM 86", "3896839", and "F178"
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Old 10-28-2016, 03:13 PM   #2
clapage6
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Re: differential ID questions

Quote:
Originally Posted by 85supersierra View Post
I am trying to identify my rear diff. I know it is a 12 bolt GM truck rear but I am having trouble finding the correct pinion seal for it. The only casting numbers I have found are "GM 86", "3896839", and "F178"
as far as i can remember they were all the same as for pinion seal. I could be wrong but here is a part no.

TIMKEN 8460N

Chevy 12 Bolt rear end Pinion Seal

Fits Chevy 12 Bolt PASSENGER CAR and TRUCK Rear Ends
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Old 10-31-2016, 10:24 PM   #3
85supersierra
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Re: differential ID questions

Thank you sir. I will give that one a shot. I went to Advanced Auto and they gave me four different parts and none of them fit.
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Old 11-03-2016, 11:54 AM   #4
clapage6
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Thumbs up Re: differential ID questions

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Originally Posted by 85supersierra View Post
Thank you sir. I will give that one a shot. I went to Advanced Auto and they gave me four different parts and none of them fit.
No problem man, post up your findings so we know what worked for you
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