AMC model 20 axles - Off-Road Forums & Discussion Groups
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post #1 of (permalink) Old 12-30-2002, 11:33 AM Thread Starter
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AMC model 20 axles

Does anyone have a link to the discussion about replacement model 20 one-piece axles? Seems I remember a thread a while ago and search is down (honest, I tried!) I broke one of my Summers Bros. and can't decide if to try and get a replacement or go with a new kit.

Thanks,

GaryM
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post #2 of (permalink) Old 12-31-2002, 12:04 PM
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Re: AMC model 20 axles

1. I've spent a sleepless night thinking about this.
2. IMHO... Repalce the Summers Bros. axle.
3. I'll cost you more to do otherwise.
4. You're familiar with the install.
5. You've been there - done that.
6. I'd be bettin' that you'll not gain that much more reliability or strength wth another vendor's axle.
7. What were the conditions when the axle broke?
8. What can you do to improve the chances of axle survial under similar conditions the next time?
9. Have you thought any about hardening the AMC20 by:
a. Trussing the axle.
c. Welding the tubes to the diff.
d. Increasing the tubes "thickness" by shrouding the tubes?
10 All the items in # 9 above could be done with out much money, or grief.
11. A hardened AMC20 is better than an Un-hardened AMC20.
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post #3 of (permalink) Old 12-31-2002, 01:14 PM
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Re: AMC model 20 axles

Hey Leve,

What do you think the strength will be after you do all that to an AMC 20, I already have Superior 1pc. and am putting 4.56 gears in it, I can easily weld the tubes and shrouding, not sure if anyone's done it, but it should be able to be done cheap.

What do you think as against swapping a whole nother axle. I know most people will say swap, but I already put the 1 pc's in and ordered gears.
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post #4 of (permalink) Old 12-31-2002, 01:21 PM
 
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Re: AMC model 20 axles

Wow, I've had my Summers Bros axles since the mid 80's and never broke one and they have seen some hard use running 36's when it was a Jeep and after it became a swamp buggy. The stock axles lasted less then a month after the 36's and was thinking of getting another set for the new Jeep when the time came and buget allowed. They were supposibly the best of the best at the time I bought them. Is it common to break them? What exactly broke on them?

Is there another brand thats better in anybodies opinion?

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post #5 of (permalink) Old 12-31-2002, 01:42 PM
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Re: AMC model 20 axles

I've had Moser's for over 10 years and they have held up to some pretty darn hard wheeling.
post #6 of (permalink) Old 12-31-2002, 02:47 PM
 
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Re: AMC model 20 axles

I just saw last night on the pirateBBS, some guy in california giving away ( free) some one pc axles, he said they need new bearings, and they are for a wide track.

Ill find the post and link it if you are interested.

if youve got 1 pc axles, and the gears you want, then make a truss so teh tubes dont rotate, and if neccesary makes the tubes stronger ( shroud) why would you swap?
unless of course you dont have the ability to weld the truss or shroud.


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post #7 of (permalink) Old 12-31-2002, 02:50 PM
 
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Re: AMC model 20 axles

If gmoabrim isn't interested in them I sure would be as I'll be using wide tracks on my new Jeep.
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post #8 of (permalink) Old 12-31-2002, 03:01 PM Thread Starter
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Re: AMC model 20 axles

LEVE,

The conditions were: slickrock, a 8"-12" bump-up, nose slightly elevated and somewhat more weight on the left rear of the Jeep (Gold Bar Rim Trail). I'm running 4.56 gears, a Detroit and 33-12.50's at 8 psi. The housing has been welded and I run an under the axle truss. The axles have been in since 1990 and looking at the end of the broken axle it has actually split. If I can get a dig. camera I'll try and upload a picture. Brad posted pictures quite a while ago of a reinforced AMC 20 and I may go that route now that wheeling is over for a while.

GaryM
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post #9 of (permalink) Old 12-31-2002, 03:06 PM
 
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Re: AMC model 20 axles

I know nothing about the guy, so take it for what its worth, also he says prefers local, but will ship for extra beer $$$.
go get em!

http://www.pirate4x4.com/forum/showt...hreadid=105409


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post #10 of (permalink) Old 12-31-2002, 06:47 PM
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Re: AMC model 20 axles

1. The R&P's strong in the AMC20.
2. If you:
a. Truss
b. Weld the tube to the diff.
c. Strenghten the tube with shrouding.
3. It should be fine for most applications.
4. You've already absorbed most of the cost of upgrading the axle with the Superior Axles.
5. To not install them you'd have to take a loss on the purchase and
6. Then you're still stuck with a broken AMC20.
7. So IMHO the choices are being narrowed down.

Gmoabrim

1. Slickrock can be nasty, very nasty.
2. Slick in one spot and like sandpaper 3" away...
3. And you'll never see it commin'.
4. If you're grabbin' even a little air the downward and foward vectors muck up the waters a LOT. (Note... I'm not saying you were up in the air at the time!).
5. IMHO... you'd have borken a Dana44 as well, especially if it'd been in the Jeep for 12 years of hard use.
6. Again, IMNO...that axle's serviced the Jeep quite well... it don't owe you a thing.
7. Good luck on the repair
8. Let us know the results.
9. Oh, it may be a good idea to pull the other side an look at the state of that axle...
10. You dont't want to do it again for another 10 years.
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