What years did GM trucks have 6 lugs rears?

[Frank]

my 95 GMC C1500 4x4 had the whole rear replaced with a rear from a "little earlier year" truck, but the previous owner could not tell me what year. It is a little narrower than the original. I need to replace the axle bearings and seals bad and I hate to tear it down before I locate them.

Like I said, it is a 6 lug and supposedly this rear came from a 3/4 ton. Does anyone know if the bearings and seals changed from say 78 - 95 in those rear ends? I was thinking that GM stopped using the 6 lugs rears in the late 60's and didn't use them again until the 90's. This rear obviously is older than 95.

BTW, is there such a thing as a repair bearing or seal with an offset for cases where the axle shaft may have been grooved from the worn seal?

[YALE]

There should be a tag on the axle housing, and it should have the info you seek.

[krazy kris]

I had a 69 Chevy 3/4 ton with 6 lugs

[Pro88LX]

as far as i know all the way back to the 60's, the 4x4's have all been 6 lug. However in the 88-98 body style trucks they did make a "light duty" 3/4 ton that was 6 lug and 2wd. maybe this is the rear you have? I would get any numbers you can off of it and measure it and go on the chevy truck forum for your body style and see if anyone can id it.

[Rreemo]

the 73-87 3/4 ton trucks actually had 8-lug wheels, 5-lug on 2WD 1/2 tons, and 6-lug on some of the 1/2 ton 4x4's. I know for sure that 71-72 had 8-lug in a 3/4 ton and 5-lug in a 1/2 ton. 70' back were 6-lug in the 1/2 ton trucks.

I can't recall 100% sure, but I believe that 88'-92' were 6-lug in the 3/4 tons, 5-lug in the half tons, and then 93-98 were again 8-lug in the 3/4 ton, still 5-lug in the 1/2. They didn't start using 6-lug in the 1/2 tons again until 99'.

[Pro88LX]

I can't recall 100% sure, but I believe that all 88'-98' were 6-lug in the 3/4 tons, 5-lug in the half tons. They didn't start using 6-lug in the 1/2 tons again until 99'.

the 88-98 3/4 tons were 8 lug. the 6 lug 3/4 tons were usually ext cabs and i believe always with short beds. I believe it is the same 14bolt semi floater rear end in both 3/4 ton trucks, just a different lug pattern

edit: after a little googleing the 6 lug 3/4 ton has a 7200gvw and the 8 lug has a 8600 gvw . So it appears that the 6 lug 3/4 ton is a 1/2 ton with a 14 bolt rear and different springs id bet.

[TexasT]

Is it a ten bolt?(you know holding the cover on)
I would thing that it might be a 73-87 from a 4x4 1/2 ton if it is narrower. With out a stamped number hard to tell. See if you can hit the tube with a wire brush and see if you can find any.