I've got the AMC model 20 rear in my Jeep. From what I've read and been told they're pretty weak. When I got the Jeep the guy threw in a set of one piece rear axels. Will the one piece axels make the rear strong enough for mild wheelin' behind a stock 304 with headers and a 4bbl.
One piece axels
- Thread starter flatie46
- Start date
SteelHeadz
Super Moderator
I'm running an AMC 360 with a 4bbl edelbrock carb intake and cams rolling on a set of 35X 14.5-15's with a stock Model 20 rear axle. For the past 10 years of wheeling and a DD, the only thing I had done to it is replace the axle seal on the rear passenger side and service it. Although. I have plans of trussing it , 1 piece axles , regear and lockers.
The Model 20 is actually a pretty stout axle with some major draw backs.
Replace the shafts with quality 1 piece shafts, preferable chromoly material, when you lock the axle, if you use a lunch box locker, get a harden cross pin, I've seen a number of cj cross pins shear. with just those mods, I'd run up to a 36" tire with out too much worries.
Replace the shafts with quality 1 piece shafts, preferable chromoly material, when you lock the axle, if you use a lunch box locker, get a harden cross pin, I've seen a number of cj cross pins shear. with just those mods, I'd run up to a 36" tire with out too much worries.
I don't know anything about these axels, they may be el cheapos. I'm gonna run 31x10-50's and no lift. Theres been some question about this Jeep as in if it's lifted or not. I say it's not, a couple of friends have looked at it and they think it has. If it has they've put re arched springs in it and it's minimal. I think it just looks that way because of the street tires. It may be spring before I swap the axels, just getting my game plan together. Thanks for the info, and now back to the underside of "Project Dirt Clod".
Turbogus
Active member
I seem to recall an article that mention between the Corporate 20 and Dana 44, the Corporate 20 was a heavier axle shaft but it's downfall was the two piece design. Pity they engineered it that way, must've been the same group that developed 'split rims' 
on trucks.
Speaking of split rims, was watching IRT Deadliest roads the other day and the driver from Alabama mentioned that these weren't even legal in the states. Hmmmm, I recall my time in the Marines, all our M50 series trucks were all split rim. After seeing a tire cage - post ring failure [Bent all to hell], each time my turn came to work in the tire shack, I paid $50 to LCpl Mcagoon (we all had goofy nicknames then, mine was Guppy, how they got that from Gustafsson, I dunno) to take my turn.
on trucks.Speaking of split rims, was watching IRT Deadliest roads the other day and the driver from Alabama mentioned that these weren't even legal in the states. Hmmmm, I recall my time in the Marines, all our M50 series trucks were all split rim. After seeing a tire cage - post ring failure [Bent all to hell], each time my turn came to work in the tire shack, I paid $50 to LCpl Mcagoon (we all had goofy nicknames then, mine was Guppy, how they got that from Gustafsson, I dunno) to take my turn.
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