AMC 20 Rear Axle Nut size?? - JeepForum.com
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Unread 06-18-2013, 06:02 AM   #1
BeesJeep
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AMC 20 Rear Axle Nut size??

I am in the process of putting new bearings in my rear axle and I need to tighten down the large nut with a pin that holds the hub to the axle. My issue is that a 1 1/14 socket is a little too small. I can get it on but I have to use a hammer and it messes up the edges of the nut. A 1 3/8 seems a little too big. Is the correct size 1 5/16? And, if so, do they even make a socket this size?

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Unread 06-18-2013, 07:40 AM   #2
CJ7ROB
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I believe it is 32 or 33mm.
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Unread 06-18-2013, 07:57 AM   #3
CSP
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Yes, there is a 1-5/16". I have this size in 1/2" and 3/4" drives.
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Unread 06-18-2013, 12:54 PM   #4
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Yes, there is a 1-5/16". I have this size in 1/2" and 3/4" drives.
YUP
LG
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Unread 06-18-2013, 01:09 PM   #5
82JeepCJ7
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Just so happens, the pinion nut on the AMC 20 axle is 1-5/16" as well.
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Unread 06-18-2013, 01:42 PM   #6
keith460
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Its ironic, but the measurement from the end of the axle threads where the nut screws on-to-the wheel hub is also set to 1-5/16" or 33mm.
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Unread 06-18-2013, 06:27 PM   #7
BeesJeep
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Which company makes a 1 5/16 socket? I checked Sears (Craftsman) and they didn't have one.
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Unread 06-18-2013, 06:31 PM   #8
skizriz
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I picked up a 3/4 drive socket at Tractor Supply for about $5.
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Unread 06-18-2013, 08:35 PM   #9
LumpyGrits
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Sears sure does......
http://www.sears.com/craftsman-1-5-1..._tnt=39869:4:0

Snap-on, Proto, Maco also have them
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Unread 06-18-2013, 08:42 PM   #10
CSP
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The Sears you checked not having one in stock doesn't mean that Crapsman doesn't make one. My 3/4" drive 1-5/16" is part of a Craftsman set. I have that size in 1/2" from Armstrong, Proto, and Snappy.
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Unread 06-19-2013, 06:47 AM   #11
CJ7ROB
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Then there's HF...Probably worth though it for as many times as you'll use a socket that big.

http://www.harborfreight.com/8-piece...set-67960.html
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Unread 06-19-2013, 10:38 AM   #12
82JeepCJ7
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The outside of the socket has to be turned down to a bevel to fit into the yoke on the rear axle (if your using it for that) so a harbor freight socket might be worth it.
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Unread 06-20-2013, 06:56 PM   #13
BeesJeep
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I ended up getting the 3/4 drive socet from Tractor Supply for $7 with a 3/4 to 1/2 adapter for another $5. That was a pretty good deal! thanks for the advice!
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Unread 06-20-2013, 07:02 PM   #14
skizriz
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Quote:
Originally Posted by BeesJeep View Post
I ended up getting the 3/4 drive socet from Tractor Supply for $7 with a 3/4 to 1/2 adapter for another $5. That was a pretty good deal! thanks for the advice!
I would go with a 3/4 breaker bar over a 1/2 drive. No way will a 1/2 drive get it tight enough.
Put about a 4' piece of pipe on a 3/4 drive breaker bar, stand on it and jump up and down until it doesn't move.
Drive a few miles and do it again. And again, until you can't budge it any more.
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Unread 06-21-2013, 12:26 AM   #15
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if I recall I had a 33mm 3/4" drive socket as most 1/2" drive sets are max 32mm. I then purchased a very nice Japanese made 3/4" drive bar and literally jumped up and down on the end to get the required torque. It goes on real tight so no half measures, and you will possibly bend a 1/2" drive on it if you torque it enough.

Like the 36" Stillsons pipe wrench it was something I did not think I needed for the CJ until I got it.
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