Rear Axle ID - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**rideblue00** · 01-05-2021, 03:00 PM

I need to identify my rear axle on my 98 K1500 as its starting to get pretty noisy and I want to order bearings for it. Any info would be appreciated.

b454rat · 01-05-2021, 04:52 PM

Most likely a 8.5 10 bolt.

sweetk30 · 01-06-2021, 01:15 PM

picture of the diff cover or its a game of chance on what you got .

could be original or swapped or custom swapped or tow package and bigger axle .

look here and let us know . and try to post a pic . https://www.randysworldwide.com/diff...tification-gm/

and if 10 bolt there dime a dozen used . find one that matches and swap it in the whole axle . but pull the cover first and verify gear ratio and condition . i had to pull 3 covers to find a good one .

used 10 bolts if open diff eat spider gears and carrier bearings a lot when making noise .

and if G80 gov-loc option ( found in glovebox spid sheet sticker ) they love to go BOOM and can make lots of noise before they blow . and at this point its full reman and new carrier for ring gear .

**rideblue00** · 01-06-2021, 10:24 PM

Thanks sweetk30

01-05-2021, 03:00 PM	#1
rideblue00 Senior Member Join Date: Feb 2010 Location: Lambertville, MI Posts: 1,854	Rear Axle ID I need to identify my rear axle on my 98 K1500 as its starting to get pretty noisy and I want to order bearings for it. Any info would be appreciated.

01-05-2021, 04:52 PM	#2
b454rat Senior Member Join Date: May 2004 Location: Binghamton, NY Posts: 3,453	Re: Rear Axle ID Most likely a 8.5 10 bolt.

01-06-2021, 01:15 PM	#3
sweetk30 Registered User Join Date: May 2012 Location: horseheads,ny rust belt Posts: 2,794	Re: Rear Axle ID picture of the diff cover or its a game of chance on what you got . could be original or swapped or custom swapped or tow package and bigger axle . look here and let us know . and try to post a pic . https://www.randysworldwide.com/diff...tification-gm/ and if 10 bolt there dime a dozen used . find one that matches and swap it in the whole axle . but pull the cover first and verify gear ratio and condition . i had to pull 3 covers to find a good one . used 10 bolts if open diff eat spider gears and carrier bearings a lot when making noise . and if G80 gov-loc option ( found in glovebox spid sheet sticker ) they love to go BOOM and can make lots of noise before they blow . and at this point its full reman and new carrier for ring gear . __________________ 77-k30lb BIG truck build . 87-k30lb budget beater build . 85-k30lb the plow machine build . 85-c10sb summer fun toy . ----------------------------- HOLLEY SNIPER efi = worst case of p.i.t.a i ever had . EDELBROCK pro flo 4 = best deal going so far . love my setup works great.

01-06-2021, 10:24 PM	#4
rideblue00 Senior Member Join Date: Feb 2010 Location: Lambertville, MI Posts: 1,854	Re: Rear Axle ID Thanks sweetk30



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