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Sanity Check for Price on Moser One-Piece Axles?

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White70JavelinSST View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote White70JavelinSST Quote  Post ReplyReply Direct Link To This Post Posted: Sep/21/2021 at 1:48pm
The weak link when doing more than AMC engineered into the cars rear axle is undoubtedly the two piece axle. The differential ring and pinion are plenty tough to handle more power than people think.
The axle and how it's retained are the issue. years ago a guy road raced a pretty much stock Javelin at BlackHawk Farms Raceway, I read his story. He ended up using Ford 9" ends on the axles and retainers, IIRC. I wish I could find the article. If anyone knows where to find this article, please post a link, it might help Scrappy.
70 Javelin SST, second owner, purchased 1972
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Red Devil Quote  Post ReplyReply Direct Link To This Post Posted: Sep/21/2021 at 7:53pm
Ray Larson's "The Story of My Engine".   His issues with the stock AMC20 were after he " upgraded" to aftermarket one-piece axle shafts.  They would work out of the housing during the race as the pressed-on bearings and retainers didn't locate the shaft positively like the stock setup.  Fixed by going to 9" ends for more robust bearings and retention.  Did bend some stock shafts going over curbs on the track, hence, desire for something stronger.


Hope this helps,
RD
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Post Options Post Options   Thanks (0) Thanks(0)   Quote tomj Quote  Post ReplyReply Direct Link To This Post Posted: Sep/21/2021 at 9:41pm
After my wonderful experience with the Ford 7.5" axle in my roadster (what was a 1961 American) if I have to lift a finger to adapt an AMC rear, for a non-stock application, I'll buy a brand new custom made Ford 7.5" axle, narrowed and geared as I like it, and just weld on suspension adapters. And get rear disc brakes and parking brakes that connected to the '61's parking setup by making my own equalizer (one afternoon).

The 7.5" is 75 lbs lighter than the big axle. If you go the junkyard route, they're cheap, people toss them. They'd be fine for sixes and light V8s. One piece axles. Use the dual-pattern U-joint to connect to an AMC driveshaft. Last of "our" type is 1998.

THe thing is, getting one narrowed is easy. Only the tubes need work, you can buy axles of whartever length you want and they're not pricey.

Of course AMC wheels bolt on perfectly.

Not AMC, but it's not a part that changes the character of the car in any way (other than better brakes).

1960 Rambler Super two-door wagon, OHV auto
1961 Roadster American, 195.6 OHV, T5
1968 American, 199ci, T14
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Scrappy Quote  Post ReplyReply Direct Link To This Post Posted: 16 hours 15 minutes ago at 12:42pm
Originally posted by farna farna wrote:

You mentioned not needing the strength of the 9". I understand you want to use the AMC 20 since it was recently rebuilt and has a Tru-Trac, but a Jeep XJ Dana 35 would have worked. They are a little wider than a car AMC 15, and a little stronger -- and have one-piece axle/hubs. Many have limited slip, but not all. There was also a HD D35 used in a lot of 4.0L Comanches (not sure about XJs -- probably fewer) that has slightly larger diameter axles. You would likely have to use deeper wheels like the Eagles did (XJ/MJ axle is same width as Eagle) though. Maybe not an option for you, but could be for others who want a bit stronger axle than an !MC 15, but not as heavy as a Ford 8.8" or 9". The Ford 8" is also a bit stronger than an AMC 15 and pretty common. The D35 and Ford 8" are a bit stronger mainly because of the one-piece axle/hub. Some of the internals may be stronger, especially in the HD D35, but they are roughly equivalent to the AMC 15. AMC15/D35 use the same 7-9/16" ring gear (interchanges), but other internals are different.
Those are good points, but beside the axle itself, I don't want to deal with another set of brakes (it has aftermarket discs), getting a drive shaft made, and having to possibly have wheel fitment issues with the new wheels I already have.


Edited by Scrappy - 16 hours 8 minutes ago at 12:49pm
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Scrappy Quote  Post ReplyReply Direct Link To This Post Posted: 16 hours 9 minutes ago at 12:48pm
Originally posted by tomj tomj wrote:

After my wonderful experience with the Ford 7.5" axle in my roadster (what was a 1961 American) if I have to lift a finger to adapt an AMC rear, for a non-stock application, I'll buy a brand new custom made Ford 7.5" axle, narrowed and geared as I like it, and just weld on suspension adapters. And get rear disc brakes and parking brakes that connected to the '61's parking setup by making my own equalizer (one afternoon).

The 7.5" is 75 lbs lighter than the big axle. If you go the junkyard route, they're cheap, people toss them. They'd be fine for sixes and light V8s. One piece axles. Use the dual-pattern U-joint to connect to an AMC driveshaft. Last of "our" type is 1998.

THe thing is, getting one narrowed is easy. Only the tubes need work, you can buy axles of whartever length you want and they're not pricey.

Another benefit of the 7.5" over the 9" is less parasitic drag.  Depending on who you ask, the 9" wastes an extra ~5% in power (some say 2%, some say 10%, who knows?), which is merely a side effect if you need the strength of a 9", but if you don't, it's just another detriment.

This is why I got a custom 12-bolt from Moser for my '57 Chevy, instead of a 9" which would have been less expensive.  I'm never going to need more than the 600 ft-lbs this 12-bolt is supposedly rated for, especially since I don't drag race (slicks or not).
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Post Options Post Options   Thanks (0) Thanks(0)   Quote gremlin 72 Quote  Post ReplyReply Direct Link To This Post Posted: 8 hours 55 minutes ago at 8:02pm
Just received moser axles this month for my gremlin, from moser. Axles $385.00 sealed bearings $70.00 bearing retainer $17.50 and inner & outer seal kit $20.00  Total being $492.50 plus shipping and tax. Hope this helps. 
72 jolly green gremlin X
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