AMC20 Rebuild Questions - Page 4 - JeepForum.com
 1Likes
Reply
 
LinkBack Thread Tools
post #46 of 71 Old 09-13-2020, 10:53 PM
80cj
Web Wheeler
 
80cj's Avatar
1980 CJ5 
 
Join Date: May 2002
Location: Hawaii
Posts: 8,322
Quote:
Originally Posted by ddawg16 View Post
If you go with the Detroit TruTrack, you don't need the friction modifier
Also Auburns are not rebuildable. It uses cone clutches that bear against mating surfaces in the case. In use, the case wears. Don't know how long it takes to wear a case out. Auburn used to advertise that their limited slips are 30% stronger than a stock diff.

80cj is offline  
Sponsored Links
Advertisement
 
post #47 of 71 Old 09-14-2020, 07:11 AM Thread Starter
abernut
Registered User
 
abernut's Avatar
1985 CJ7 
 
Join Date: Jun 2010
Location: Jacksonville Beach
Posts: 486
My rebuild parts are starting to arrive so I decided it was a good time to clean/paint everything. It took a full day with the wire wheel to get all the dirt and grime off. I then primed and painted everything.



The axle tubes were in desperate need of an enema so I took an old grout/thinset mixer, cut the paddle end off, drill a hole in the end to help support the wire wheel and welded it in place.


The length was perfect and it did a pretty good job.




I'm still waiting on the one-piece axle so I may use this time to clean the garage up.
abernut is offline  
post #48 of 71 Old 09-14-2020, 02:55 PM
80cj
Web Wheeler
 
80cj's Avatar
1980 CJ5 
 
Join Date: May 2002
Location: Hawaii
Posts: 8,322
Wow! Enema is right!!
Attached Thumbnails
enema.jpg  
80cj is offline  
 
post #49 of 71 Old 09-16-2020, 06:21 PM Thread Starter
abernut
Registered User
 
abernut's Avatar
1985 CJ7 
 
Join Date: Jun 2010
Location: Jacksonville Beach
Posts: 486
Okay. All of my parts have arrived. My original plan was to use the original bearings, sand them down, and use them to set the backlash. I called a shop near me and they suggested against it stating that the bearing usually get damaged when pulling them. If that is the case should I just purchase the cheapest ones I can find for that axle or should I buy the same ones that are going on it?

Thanks,
Mike
abernut is offline  
post #50 of 71 Old 09-16-2020, 08:26 PM
80cj
Web Wheeler
 
80cj's Avatar
1980 CJ5 
 
Join Date: May 2002
Location: Hawaii
Posts: 8,322
Quote:
Originally Posted by abernut View Post
Okay. All of my parts have arrived. My original plan was to use the original bearings, sand them down, and use them to set the backlash. I called a shop near me and they suggested against it stating that the bearing usually get damaged when pulling them. If that is the case should I just purchase the cheapest ones I can find for that axle or should I buy the same ones that are going on it?

Thanks,
Mike
Quote:
Originally Posted by 80cj View Post
My AMC 20 has the differential bearing shims located beween the bearing cups and the housing so no need to remove the bearing cone once it's on. The inner pinion bearing cone stays on once it's installed since the shims are between the cup and housing. I installed my bearings using a length of pipe and a hammer. I screw on a cap to the pipe to pound on. When the hammer bounces off the pipe, the bearing is all the way on. If you have access to a press, that's better.
Hopefully your diff shim kit includes diff shims that go between the bearing cup and the housing. then no need to pull the bearings once they're installed.
80cj is offline  
post #51 of 71 Old 09-17-2020, 05:25 PM Thread Starter
abernut
Registered User
 
abernut's Avatar
1985 CJ7 
 
Join Date: Jun 2010
Location: Jacksonville Beach
Posts: 486
Finally. All the pieces and parts have arrived. It was like Christmas.


I was going to start assembling the rear end this evening but....I screwed up somewhere already.
My new ring gear does not fit the limited slip I purchased. It is a LOT smaller.


I checked the parts and the order and they look correct.



Where did I screw up?
abernut is offline  
post #52 of 71 Old 09-17-2020, 06:04 PM Thread Starter
abernut
Registered User
 
abernut's Avatar
1985 CJ7 
 
Join Date: Jun 2010
Location: Jacksonville Beach
Posts: 486
Just got off the phone with Summit. Spent about 10 minutes taking measurements and it appears this may have been a returned item. The part number on the box was correct but the ring and pinion were not the correct items.

They are sending a new set out tomorrow.
abernut is offline  
post #53 of 71 Old 09-17-2020, 06:47 PM
80cj
Web Wheeler
 
80cj's Avatar
1980 CJ5 
 
Join Date: May 2002
Location: Hawaii
Posts: 8,322
While you waiting you can make up some alignment pins to help align the ring gear. Just get a couple 7/16x20 bolts and cut the heads off. Cut screw driver slots with a hack saw to ease removal.

When you removed the carrier from the housing were the shims located between the housing and bearing cups?
80cj is offline  
post #54 of 71 Old 09-17-2020, 07:39 PM Thread Starter
abernut
Registered User
 
abernut's Avatar
1985 CJ7 
 
Join Date: Jun 2010
Location: Jacksonville Beach
Posts: 486
Quote:
Originally Posted by 80cj View Post
While you waiting you can make up some alignment pins to help align the ring gear. Just get a couple 7/16x20 bolts and cut the heads off. Cut screw driver slots with a hack saw to ease removal.
That is genius. It took me a few minutes to realize what you were talking about but I never thought about how the ring gear has to be spot on. Did you press yours on with a press or gently love taps with a hammer.

Quote:
Originally Posted by 80cj View Post
When you removed the carrier from the housing were the shims located between the housing and bearing cups?
Yes, they were. You were correct in your last post. I do not need to make any setting bearings.

Although I do believe I need to slightly sand down the original pinion race to make shim adjustments easier correct?
abernut is offline  
post #55 of 71 Old 09-17-2020, 07:48 PM
Fourtrail
Registered User
1974 CJ6 
 
Join Date: Dec 2007
Location: Illinois
Posts: 4,797
Quote:
Originally Posted by abernut View Post
That is genius. It took me a few minutes to realize what you were talking about but I never thought about how the ring gear has to be spot on. Did you press yours on with a press or gently love taps with a hammer.

Carrier in the freezer and ring gear out in the sun or in the oven and they will slip right together.

80 CJ-5, 74 CJ-6, 56 CJ-5
Fourtrail is offline  
post #56 of 71 Old 09-17-2020, 08:45 PM
80cj
Web Wheeler
 
80cj's Avatar
1980 CJ5 
 
Join Date: May 2002
Location: Hawaii
Posts: 8,322
Quote:
Originally Posted by abernut View Post
That is genius. It took me a few minutes to realize what you were talking about but I never thought about how the ring gear has to be spot on. Did you press yours on with a press or gently love taps with a hammer.

Yes, they were. You were correct in your last post. I do not need to make any setting bearings.

Although I do believe I need to slightly sand down the original pinion race to make shim adjustments easier correct?
If you have a press, that would be a good way to do it. I draw my ring gears on with the bolts tightening cross wise a little at a time. You can use the original pinion race sanded down for setup but there is no guarantee that when you put your new race in the pinion position will not change.
80cj is offline  
post #57 of 71 Old 09-24-2020, 08:38 PM
aggiejon
Registered User
 
aggiejon's Avatar
1979 CJ7 
 
Join Date: Jan 2009
Location: Temple
Posts: 753
4.10s is my next mod. watching...
aggiejon is offline  
post #58 of 71 Old 09-24-2020, 09:39 PM Thread Starter
abernut
Registered User
 
abernut's Avatar
1985 CJ7 
 
Join Date: Jun 2010
Location: Jacksonville Beach
Posts: 486
I was hoping to make some progress tonight but.....

I used 80CJs advice and purchased some longer 7/16x20 bolts to pull the ring gear onto the new Detroit TrueTrac.


It worked perfectly. I then applied LockTite to the bolts and tightened them down in a criss-cross pattern. I tried torqueing them to 105 foot pounds but I will need to figure out a way to secure the diff.




I purchased this overhaul kit from summit.

The first bearing went on without issues but the second one is WAY to small. The bearing is actually bigger but there is no way it's fitting on the diff.


Not sure what is going on.
abernut is offline  
post #59 of 71 Old 09-24-2020, 09:48 PM Thread Starter
abernut
Registered User
 
abernut's Avatar
1985 CJ7 
 
Join Date: Jun 2010
Location: Jacksonville Beach
Posts: 486
I'm actually finding a ton of bad reviews on USA Standard Gear and bearings that do not fit. Very sad.
abernut is offline  
post #60 of 71 Old 09-25-2020, 12:33 AM
80cj
Web Wheeler
 
80cj's Avatar
1980 CJ5 
 
Join Date: May 2002
Location: Hawaii
Posts: 8,322
Next time use red loctite.
80cj is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the JeepForum.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.



Email Address:
OR

Log-in











Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome