I'm hoping one of the machine shop types has access to a Timken bearing catalog or something.

I've been researching the idea of putting 35 spline axles in an AMC-20 (using a custom spool). For the FSJ AMC-20's this is possible; CJ's are out of luck (smaller wheel bearing).

What I need is a carrier bearing that is the same size OD, but about 1/8" (or more) bigger ID; and still able to withstand the same pressure.

I'll get the measurements and part numbers (since I don't have a micrometer) tonight. If someone has access to and could help me look up a bearing that will work. TIA!

ALSO! Does anyone know of a website or have a manual on spindles? I was just thinking that since the wheel bearing is large, I might be able to find a FF spindle for that will fit the FSJ AMC-20; the wheel bearing is (roughly) 2 7/8"

For all of those that are going to ask "Why AMC-20" the answer is because:flipoff2: (actually, think about it. 35 spline axles without that big ass D60 diff hangin' way down. AND I've already shaved the AMC-20 and gained 3/4" to 7/8")

Thanks,

- Mike

A 12 bolt has the same ring gear size and they make 35 spline spools for them so you might be able to use that for some x-reference or bearing size reference.

What is the size of the bearing (OD and ID) of a 12 Bolt??

Here's what I measured -- again this is not with a micrometer so it to the nearest 1/32"...

The stock AMC-20 Carrier Bearing is 3 1/6" OD, 1 3/4" ID. The part number is LM603012.

I need a bearing that is the same size OD and a minimum of 1 7/8 ID (2" ID preferred) same width, and roughly the same load rating.

I also have a Ford 8.8 that I've measured. It too uses the same size bearing -- at least the ID part (I don't have the bearing race for the 8.8) The Ford axle is about 1 11/32" Leaving just over 3/16" as the thickness of the carrier where the bearing presses on. The AMC-20 is about 1 1/4" leaving the bearing surface about 1/4" thick.

With the stock bearing, and 35 spline 1 1/2" axles, this surface would be reduced to about 1/8". I'm thinking that is a bit thin, correct? OR would using a better material for the Spool make up for the thinner wall? The stock carrier is cast; I'm assuming that the spool would be machined out of round stock (Billet?) steel. Either way, If there is a bearing that is at least 1 7/8" ID, then I would feel much more comfortable; that would net about 3/16" wall (or the same as the Ford 8.8 stock). Or is all of this moot because the axle runs through there and helps support the carrier?

Any help is appreciated.

- Mike

What size axleshafts can you get from Currie with their Hi pinion 9? That must use a similar carrier (if not the same) to an 8.8 because they use the 8.8" ring gear...if you can get their hi pinion center chunks with like 40 spline axles, you should be able to work something out there - granted all bets are off on the OD of the bearing in the 9" housing. I'd be interested to see your final results...

Bryan

Originally posted by Oxjockey
granted all bets are off on the OD of the bearing in the 9" housing. I'd be interested to see your final results...

Yea, the OD might be the thing that hoses this plan up. The backup plan is to go 33 spline which will definitely work.

I'm hoping one of the engineer types will chime in here about the strength of the bearing mounting surface Cast vs. Steel or something.

If I don't get anything here, I'll try to contact Timken directly (like they'll care :rolleyes: )

Either way, I'll post my findings here.

- Mike