Rear End Housing

 

Are you aware of issues with the ring gear bolts on an AMC 20 and the situation / application under which issues occurred?

 

Compare 8 x 7/16" bolts on the larger ring gear bolt circle diameter versus a typical 5 x 1/2" bolts on the smaller 4 1/2" wheel bolt circle diameter, then consider that with e.g. a locker, one wheel can take full torque.   Now where is the weakest link?

 

I have a NOS AMC20 housing.  I believe it's the narrow one used in 70 AMX, Gremlin, and Hornet, so it would fit an American.  It has a tag wired to it that shows P/N 8127749 GR. 9.001.  It has a little surface rust from sitting in a shed for 20 years before I acquired it.  It has spent it's whole life in the Denver area, so no serious rust.   I might trade for a set of headers that will fit a 69 Rambler with Control Freak suspension.

Bob

tufcj

I went back through the posts. You said "64 Rambler", but didn't mention American or Classic. I think the assumption has been American since it used an open driveshaft and the 64 Classic/ambassador used a torque tube....

When you get a build page set up please post a link here!!  I just put a Jag IRS in mine way back in 2003... (the 63 Classic wagon in my avatar)

Lots of FSJ owners upgrade to a D44 because it's readily available for a bolt-in. The main difference is the one-piece axles. I agree -- differential wise it's not much of an upgrade, more of a lateral move. Good for about 500 hp. The AMC 20 has been run in the lighter cars (68-70 Javelin/AMX and American) with stock axles and 8" slicks (widest that fit stock wheel wells) with stock two piece axles. Cutting more keyways doesn't really improve strength much, keeping the axle nut torqued does. I believe when they used to cut additional keyways that hardened keys were used, otherwise it wouldn't help much, if any. The factory key is there mainly to make sure the hub goes back on the way it came off when changing seals or bearings. The old TSMs (58 for sure) say to mark the hub and axle before removing -- no keyway.