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95 S_Trucker · 05-17-2019, 06:27 AM

Those codes are only listed on the spid, not on the axle/housing.

Pull the cover. That way you can inspect it, see what you have, and you’ll want to change the fluid anyways.

The 8.5 was used on 4.3 5 speed trucks/blazers, and all zr2 trucks(4” wider than reg 4wd, 8” wider than 2wd). The axle tubes are bigger at the center section and they neck down before the spring perches.

05-17-2019, 06:27 AM	#7
95 S_Trucker Registered User Join Date: Oct 2009 Location: . Posts: 2,178	Re: S10 rear end id. Those codes are only listed on the spid, not on the axle/housing. Pull the cover. That way you can inspect it, see what you have, and you’ll want to change the fluid anyways. The 8.5 was used on 4.3 5 speed trucks/blazers, and all zr2 trucks(4” wider than reg 4wd, 8” wider than 2wd). The axle tubes are bigger at the center section and they neck down before the spring perches.