differential ID questions - The 1947 - Present Chevrolet & GMC Truck Message Board Network

85supersierra · 10-26-2016, 05:10 PM

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"

clapage6 · 10-28-2016, 03:13 PM

Quote:

Originally Posted by 85supersierra

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

85supersierra · 10-31-2016, 10:24 PM

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.

clapage6 · 11-03-2016, 11:54 AM

Quote:

Originally Posted by 85supersierra

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

10-26-2016, 05:10 PM	#1
85supersierra Registered User Join Date: Dec 2012 Location: Walhalla SC Posts: 135	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"

10-31-2016, 10:24 PM	#3
85supersierra Registered User Join Date: Dec 2012 Location: Walhalla SC Posts: 135	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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