The Stovebolt Site Forums The Shop Area Engine Shop i find this hard to believe

i've checked with 6 major differential parts suppliers, and NO ONE has rebuild parts/kits for a '55, 1/2 ton gm trk, 9.3 rear. they have jpeg ids but.... i can't even find someone that can id the hyatt/ general bearing#. not even hyatt/general! why?

Give Patricks a call. He carries a complete ovehaul kit both with and without bearings.

Not sure about a 9.3 rear.
What # are you trying to ID.

The Bearing Chart starts here:

http://chevy.oldcarmanualproject.com/1929_57chevyparts/57cmpc1117.htm

yeah, patricks is my next step, but i think i already know what i'm gonna hear. but maybe not

thanks for the chart, and the numbers are close, but no cigar. and i'm starting to wonder if the rear had been rebuilt and someone used whatever was close, bec the bearings and race have been worn? to an ovoid shape. they're hyatts, and on the race there's 11445-Y but no other letters. and an inch away there's a 40-A. i have to pull the bearings to see the numbers on the inner side

i kept searching on the net and found a chinese co, Zhejiang Zhengda Bearing Co., Ltd., that supplies axle/diff bearings for suzuki trk-suv with a KC11445-Y number. and from that chart, the KC was a letter prefix on some of the listed bearings

i'll pull a bearing and take them/race into a couple bearing supply houses in the 'city', and see if they can match it with a current timken et al. down side is that i don't have a two-legged, 'long-reach' puller, and i hate trying to knock/damage it off. even if it's spent to begin with

well, an old timer at a bearing house knew exactly what it was, and crossed it to a current timken - salty! but the linked chart shows the originals as -x vs the -y that mine are. ?
and it isn't odd wear that i see - mine are 'barrel' style bearings, and maybe that's why people don't bother anymore, hence rare=$. $250/set - ouch!

but this is nuts! - for a '93 suzuki sidekick, same timken numbers - $68/set
and the same bearings are listed for selica/supra diff, but i noticed from the pics that the cross-referenced timkens are not barrel style

.... I may be wrong here but if the inner/outer race's are correct to fit it shouldn't matter what the bearings are??

If the bearing roller is barrel styled it's probably a self-aligning bearing which allows for some movement or runout of the axis. Straight preloaded angular-contact and tapered roller bearings are particularly rigid and cannot take any deflection of its axis. I don't understand why there would be a self-aligning bearing in a differential carrier.

Denny Graham
Sandwich, IL

yeah, this mismatched conversion number and serious price difference has me scratching me head. and i'll be calling the local bearing place monday to see if i can get some sort of answer

GM used those "barrel bearings" in a number of applications including the rear axle hubs on 3/4 & 1 ton trucks. They were in a 66 C-20 that previously I owned. I also saw them recently in a 4:10 rear end we installed in a 55 3600. The differential was from a 72 C-20. I think they may have been made by New Departure which was a GM component.
Fred

they're stamped hyatt, and i was told that the truck was a 1/2ton. and judging from the frame, springs etc, it looked to be a 1/2 ton

The 3/4 and 1 tons used a taper roller bearing in full floating applications, where the 1/2 tons and 3/4 ton semi-float would have the barrel type.

long - internally, how would i identify a full from a semi? so far, i can't find any numbers on this darn thing/tag not on cover, and re-sealed/gasketed at some point in it's life

Full floaters have the big hub sticking out, with 8 bolts holding the axle shaft in. Semi floaters just have the wheel mounting flange.
There shouldn't be a tag on it, unless it was a '60-'62 Posi. Numbers are stamped on the front face of the carrier, on the passenger side.

we have a bingo - i was looking for a raised # like a head, block etc. so, with a little more wire brush and by the bolt id, it's a semi, and the id# is AF1 18. so, would it be wrong, since timken converts the hyatt # to a taper roller, to use a taper roller?

No, it has to be the same style bearing. The Timken number is most likely not a taper, but a standard roller.

yes, timken sdrd, from the picture i saw

and i just eyeballed the inner sleeve of the bearing assy on one of these barrel-type, and it has def spun some on the case half hub