AMC 20 Axle bent - JeepForum.com
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post #1 of 18 Old 10-12-2017, 11:22 PM Thread Starter
turkish6
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AMC 20 Axle bent

Hi All,

I have a bent AMC 20 axle (passenger side) that I need to replace. According to everyone this is ideal time to upgrade to 1 piece. Is it possible to only upgrade one side and upgrade the other side later down the line?

I don't take the Jeep to the extremes. 90% city roads and 10% light off-roading so if it's not recommended to replace just one side I will stay with the 2 piece for now.

Thanks as always

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post #2 of 18 Old 10-13-2017, 02:31 AM
skizriz
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Quote:
Originally Posted by turkish6 View Post
Hi All,

I have a bent AMC 20 axle (passenger side) that I need to replace. According to everyone this is ideal time to upgrade to 1 piece. Is it possible to only upgrade one side and upgrade the other side later down the line?

I don't take the Jeep to the extremes. 90% city roads and 10% light off-roading so if it's not recommended to replace just one side I will stay with the 2 piece for now.

Thanks as always
Here may be the issue. The stock two piece axles use a center thrust block between them, that semi floats on the center pin, to set the preload on the bearings on each axle.
The one piece axles don't use the thrust block, most of them call to remove it. Their bearing preload is set with spacers at the bearings.
I don't think the two would play well together.
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post #3 of 18 Old 10-13-2017, 06:09 AM
jp360cj
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Have you verified the housing is still straight? They are known to not be the strongest, and if you bent a shaft, you could have easily bent the housing also.

77 CJ-7- AMC 360, Edelbrock cam, MC2100, Fenderwells, CJ T18/D20, Chevy D44/EB 9" rear, Trutrac f/r, 4.11, SOA, 1.25 lift shackles, 35x12.50 BFG KM2s, Shackle Reversal
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post #4 of 18 Old 10-14-2017, 11:49 AM
1980tallcj7
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I agree with Skiz, I doubt mixing wound be a good idea....might be more affordable to get another AMC 20 from a pick and pull (or D44 ) versus going the 1-piece axle swap.

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post #5 of 18 Old 10-15-2017, 06:09 AM Thread Starter
turkish6
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Thanks for all the replies. I will replace with a 2 piece and upgrade down the line.

I haven't checked the housing. I raised the rear end and took the wheels off. The right side has a noticeable wobble when places in gear. How can I check the housing?
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post #6 of 18 Old 10-15-2017, 09:48 AM
Rangerrod
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Iíve been down the 1 piece axle road and even retubed an amc 20. You need to both axles at the same time.I couldnít get the axle bearing in the one piece kit to hold up.

If you donít have gears or locker in the diff. Junk the rear end. And source a Dana 44 or an explorer 8.8. Dutchman used to make shafts for the 8.8 for different bolt patterns for around $260. You can also get the 8.8ís in 4.10 ratio.

Honestly Iíd never touch an amc20 again.
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post #7 of 18 Old 10-15-2017, 10:10 AM
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Quote:
Originally Posted by turkish6 View Post
How can I check the housing?
I've never done it, but it seems you could use a digital distance finder, and two straight edges to measure the distance between the axle flanges. Put the straight edges vertical to each side's flange mounting surface, take a measurement, rotate the straight edges 90* and take another measurement. if the two measurements are different, the housing is bent.

Just thinking out loud, but is should work.

Matt


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post #8 of 18 Old 10-15-2017, 11:18 AM
80cj
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I've check housing straightness by placing a torpedo level on first one axle tube, then the other. The level indication should be the same. Turn the housing 90 degrees and do the same thing.
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post #9 of 18 Old 10-15-2017, 12:12 PM
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This too ^^^^

I was thinking more along the lines of a method that wouldn't require pulling the housing from the vehicle.

Matt


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post #10 of 18 Old 10-15-2017, 12:31 PM
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I'd start out by going around the axle tube with a long straight-edge and a set of feeler gauges.

I call it a distributor, not a dizzy.
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post #11 of 18 Old 10-15-2017, 03:32 PM Thread Starter
turkish6
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Thanks for the replies I will try to check the straightness as mentioned.

I wish I could junk it and switch to stronger axle but I currently live in Turkey and it's easier said than done. Finding a D44 is like hitting the lottery lol.
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post #12 of 18 Old 10-15-2017, 04:11 PM
skizriz
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Quote:
Originally Posted by turkish6 View Post
Thanks for the replies I will try to check the straightness as mentioned.

I wish I could junk it and switch to stronger axle but I currently live in Turkey and it's easier said than done. Finding a D44 is like hitting the lottery lol.
Mine was pretty easy to spot. Easy enough to straighten. Probably ended up straighter than it left the factory.


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post #13 of 18 Old 10-15-2017, 08:09 PM
1980tallcj7
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cool

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post #14 of 18 Old 10-16-2017, 10:05 AM
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FULL DANA 30 REBUILD->
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CJ7 LAREDO REBUILD->http://www.jeepforum.com/forum/f8/82-cj7-laredo-diesel-restoration-1179198/
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post #15 of 18 Old 10-16-2017, 10:29 AM
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Quote:
Originally Posted by turkish6 View Post
Thanks for all the replies. I will replace with a 2 piece and upgrade down the line.

I haven't checked the housing. I raised the rear end and took the wheels off. The right side has a noticeable wobble when places in gear. How can I check the housing?
Bent axle flange and/or spun hub and the hub is cocked a bit causing the wobble? I would pull apart the hub and check axle shaft runout before spending a ton of time trying to measure out the housing.

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