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model 20 answers |
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1970390amx
AMC Addicted Joined: Jul/11/2008 Location: colorado Status: Offline Points: 3314 |
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If you read it carefuly this thread does put it back together. rouge_66 has made a video of me taking one apart and putting it back together. PM him and he can sell you a copy, proceds are donated to this forum. 10$
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1970 390 4speed Bittersweet shadow mask AMX
1970 Amx missing most everything, or in a box |
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spaghettijet
AMC Fan Joined: Nov/09/2011 Location: perth Status: Offline Points: 6 |
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how do you set up the end float on the amc20 diff using the orginal axles, I need to adjust mine up. any help appreciated.
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Sparky
AMC Fan Joined: Mar/31/2012 Location: Washington Status: Offline Points: 6 |
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I know this thread has been dead for a while, But, nice right up.
One of the biggest frustrations of diff work is crush sleeves. They take a lot of torque to
crush down.
The crush sleeve on the AMC 20 is the same as a Ford 8.8.
There is a crush sleeve iliminater kit for the 8.8 and many in the Jeep world
have been installing this kit in the AMC20. I makes for a much easier install.
Have any of you ever used a Wagoneer AMC20 in a car? They are 6 on 5.5 bolt pattern, but have factory one piece axles! I am not sure how they would measure up width wise?
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vinny
Supporter of TheAMCForum Joined: Jan/05/2012 Location: Calgary Status: Offline Points: 2837 |
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I would think there must be a slight preload on them or maybe a couple of thousandths free float. The shims are on the left side. I measured mine at .030" or .032" (one or the other) end float and was pretty sure that was way too much. I removed one of the shims (.030 or .032) so I have .002" pinch or free float, can't remember which.
I just read the TSM (recent acquisition) and they are calling for .004" to .008", .006" desired. They say to seat it against the bearing cup using a lead hammer and measure the float with a dial indicator set up. |
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tufcj
Supporter of TheAMCForum Supporter of TheAMCForum Joined: Jul/10/2007 Location: Watkins, CO Status: Offline Points: 4086 |
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Vinny has it right. To set axle bearing preload, you assemble the axle. Shims go on the left (drivers) side only. Hit the left axle a couple of times with a lead or brass hammer to seat the right bearing in the cup, then move the left axle in/out while you have a dial indicator on the end. Free play is .004-.008, with .006 desired. Add or remove shims from behind the left backing plate to adjust.
Bob tufcj |
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69 AMX
74 Javelin AMX 67 Rogue If you need a tool and don't buy it... you'll eventually pay for it... and not have it. Henry Ford |
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amcenthusiast
AMC Addicted Joined: Jul/02/2012 Location: SW Atlanta GA Status: Offline Points: 1778 |
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Good article on this AMC Forum. Mainstream medias often say the AMC model 10 and 20's are 'Dana' (spicer) sourced. As far as I know AMC made their own differentials. "Twin Grip" was the name for model 10 limited slip diffys. (model 20 limited slips were called...?) AMX390 tells us about that book I remember; "Performance American Style", a book made by AMC telling how to rebuild/hop up/modify AMC stockers for high performance/racing applications.
'Performance American Style' recommended to weld the cast iron center carrier to the steel tube axle extensions, and on four speed/man trans cars to weld on angle supports to the leaf spring perches... (I rounded the leaf spring pearches on my man trans 304 Javy, can only imagine a 390 or 401) I think the Jeep guys know all the sources and how to's for the AMC model 20s?... Bulltear? AMX Enterprises also sells one piece axles? -at least AMC diffys don't fall apart from a failed 'c-clip' like GM diffys do (with much embarrasment on the dragstrip! -I've seen that happen and laughed my rear off! -having the whole axle and wheel assembly come out the side of the car!) |
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1979 AMX
AMC Fan Joined: Dec/29/2012 Location: Buffalo NY Status: Offline Points: 13 |
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Will the dif out of a Jeep AMC20 rear end fit into my AMC20 in my 79 AMX? I am replacing the ring and pinion also.
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amc67rogue
AMC Addicted Joined: Nov/05/2008 Location: Phx. AZ. Status: Offline Points: 1578 |
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The AMC 20 & the 15 were amc built . THE model 20 power lock limited slip carrier was made by dana spicer. The same carrier style for the Mopar 8 3/4 , dana 60 , early Pontiac & Olds, early 10 bolt chevy were also dana. IIRC the 15 cone clutch was made by Borgwarner .
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Keith Coggins 67Rogue X code
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1970390amx
AMC Addicted Joined: Jul/11/2008 Location: colorado Status: Offline Points: 3314 |
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yes
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1970 390 4speed Bittersweet shadow mask AMX
1970 Amx missing most everything, or in a box |
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Rockbreaker
AMC Fan Joined: May/13/2013 Location: Long Island Status: Offline Points: 10 |
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I have one of these with Superior one-piece shafts and a Detroit, also have a set of spare shafts (one-piece) but don't know how to go about getting bearing/seal set, I was told they don't interchange.
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