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AMC 20 Twin Grip Rebuild Video's

Printed From: TheAMCForum.com
Category: The Garage
Forum Name: Transmission & Drivetrain
Forum Discription: If it's between the engine and wheels, it goes here
URL: http://theamcforum.com/forum/forum_posts.asp?TID=27753
Printed Date: Jun/22/2018 at 8:53am


Topic: AMC 20 Twin Grip Rebuild Video's
Posted By: rogue_66
Subject: AMC 20 Twin Grip Rebuild Video's
Date Posted: Mar/20/2011 at 9:55pm
Thanks to Roger...aka...forum member 1970390amx; I now have a complete AMC 20 twin grip rear end with a 3:54 gear set ready to install in Project Gremlin X. I walked into his shop this morning with a couple of camera's & no knowledge. I walked out with a wealth of information & his permission to share what I learned today. I've put together a DVD for those who are interested in learning how to set up an AMC 20 rear differential. It's one hour long, has chapter markers, and covers the following topics... 

-Teardown & inspection
-Pulling the hubs
-Pinion Bearing Race R&R
-Roger had a 3:54 ring & pinion set waiting for me without the pinion bearing so he pressed on the new bearing & mocked up the pinion gear for a wear pattern
-Carrier Bearings R&R and Ring Gear Removal
-Shimming the Carrier
-Using a dial indicator to confirm that the carrier spins true before mounting the new ring gear to the carrier
-Shimming for Proper Gear Backlash
-Checking for the Proper Pinion/Ring Wear Pattern
-Installing Pinion Spacer (replacing the crush sleeve with solid spacer & shims)
-Checking Pinion Rotational Torque
-Final Setup
-Axle & Seal Installation
-End Play Shims & Hub Installation

If anyone is interested in purchasing one the cost is $10.00 + shipping and 50% of the proceeds will be donated to this forum. You can order one by sending me a PM.

Dean





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Replies:
Posted By: rogue_66
Date Posted: Mar/25/2011 at 1:21am
All the videos are now up on my gallery page with a link to each one in streaming Quicktime. This is kind of an experiment in sharing information so feedback is encouraged...

Dean


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Posted By: will333
Date Posted: Mar/25/2011 at 9:03am
I enjoyed watching this series showing the re-build. It's not something I could do myself, I wish I could because the rear in my car is going to have to be re-built due to some whine, but it's good to see how it's done and what's involved. Two questions...knowing the inherent weakness of the AMC 20 with the two-piece axles, why not install one-piece axles at this point and is the soundtrack to this video series available in the lobby? Smile Some good tunes there.

-------------
1968 AMX 390 Automatic
Turbo Silver outside,
red on the inside
"The Orbiter"

A Scott Campbell restoration


Posted By: rogue_66
Date Posted: Apr/16/2011 at 1:52am
Originally posted by will333 will333 wrote:

I enjoyed watching this series showing the re-build. It's not something I could do myself, I wish I could because the rear in my car is going to have to be re-built due to some whine, but it's good to see how it's done and what's involved. Two questions...knowing the inherent weakness of the AMC 20 with the two-piece axles, why not install one-piece axles at this point and is the soundtrack to this video series available in the lobby? Smile Some good tunes there.

Glad you enjoyed the series & the answer to your first question is that (IMO) the stock axles will hold up for my application given the car loaded, will be under 3000 lbs & running non sticky street tires (for now). In the event I decide to run some drag radials some day & take to the track on a regular basis; the one currently in the Gremlin would be a good donor & I think I know someone who could weld up the tubes & install the one piece axles. Wink Maybe a project for another time, but for now I'm trying to stretch my dollars for some other goodies on the car. 

The video series along with the soundtrack (lobby) is available on a DVD I put together last week to free up some space on my gallery page. I have edited my original post & updated it with details.

Dean





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Posted By: 71SC360
Date Posted: Apr/21/2011 at 10:16am

I just wanted to let anyone that has thought about rebuilding an AMC 20 know that this is a great video, well worth the $10 + shipping. I have always had the tools and the willingness to set up  rearend but I have always been reluctant to do one because of the uncertainty about how all of the measurements were done. This video (about 1 hour long) covers all details of tearing down, taking pinion, carrier and axle measurements and rebuilding an AMC model 20 rearend. My advice if you want to try this is to buy the video and see how it's done.



Posted By: gremlin 72
Date Posted: Dec/31/2011 at 5:54pm
Hello Dean, Happy New Year. I just saw your info and would like to purchase a copy of your DVD. Please send me info and I will paypal you if that is O.K. Mike Baldwin

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72 jolly green gremlin X


Posted By: bikerfox
Date Posted: Dec/31/2011 at 6:51pm
Thanks, Dean, for taking the trouble to do this for us AMC members.....there will be many grateful people in the long run!

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1969.5 SC/Rambler


Posted By: 68amx1
Date Posted: Dec/31/2011 at 9:28pm
I'm interested in a dvd. Let me know how to pay


Posted By: bbgjc
Date Posted: Jan/01/2012 at 10:29am
I'd like one of these videos also. Send your mailing address and I'll send the funds. ANTI-PayPal!!!


Posted By: rogue_66
Date Posted: Jan/02/2012 at 10:41am
Originally posted by 68amx1 68amx1 wrote:

I'm interested in a dvd. Let me know how to pay

Anyone interested in a copy can send a $10.00 donation to the forum then send me a PM with shipping info & I'll get one in the mail. I currently have 4 copies left but should be able to burn some more if needed.

Thanks,
Dean


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Posted By: Amc Hot Rod
Date Posted: Jan/07/2012 at 2:23am
Sounds like a great deal. I will do that on pay day

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1973 Hornet 390 4 speed
1973 Jeep Commando 401
1970 Javelin SST Ram Air
1968 Rambler Rogue


Posted By: cj78
Date Posted: Mar/16/2012 at 9:23pm
Very interested in this video


Posted By: 1970390amx
Date Posted: Mar/16/2012 at 11:42pm
Originally posted by cj78 cj78 wrote:

Very interested in this video
send Dean (rouge_66) A PM(personal message)asking for one. He started this thread, just click on his user name at the start and a drop down menu will give you the option to send a PM


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1970 390 4speed Bittersweet shadow mask AMX
1970 Amx missing most everything, or in a box


Posted By: rogue_66
Date Posted: Mar/18/2012 at 5:44pm
Sorry all,

I sent off the last copy a while back & am having trouble retrieving the files from the backup disk. If someone has a copy they can send me I can try to copy it and burn some more 

Thanks,
Dean 


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Posted By: cj78
Date Posted: Mar/19/2012 at 6:16am
where can i find these DVD of rebuilding an AMC 20 rear axle?

PM me


Posted By: bulletpruf
Date Posted: Mar/19/2012 at 7:53am
Originally posted by rogue_66 rogue_66 wrote:

Originally posted by 68amx1 68amx1 wrote:

I'm interested in a dvd. Let me know how to pay

Anyone interested in a copy can send a $10.00 donation to the forum then send me a PM with shipping info & I'll get one in the mail. I currently have 4 copies left but should be able to burn some more if needed.

Thanks,
Dean
 
Done!
 
Thanks, Dean.  This should be a huge help.  I have 4 AMC 20's that I plan to rebuild/restore and each one needs a gear swap, too.
 
Scott


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71 Javelin SST, Canary Yellow, 401, T-10
66 Fairlane GT Convt, 428, 4 sp
68 GTO Convt, 455, TH400
www.bulletpruf.9f.com


Posted By: WesternRed
Date Posted: Mar/19/2012 at 2:21pm
Can you do international postage, I would love to get a copy sent down to me in Australia?


Posted By: bbgjc
Date Posted: Mar/19/2012 at 5:28pm
Hey Scott, Hold one for me. 
I'll chat with you later tonight.


Posted By: SST343
Date Posted: Mar/29/2012 at 8:58pm
Thanks Dean - sent donation tonight.

PM sent


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Posted By: rogue_66
Date Posted: Mar/29/2012 at 9:19pm
Originally posted by rogue_66 rogue_66 wrote:

Sorry all,

I sent off the last copy a while back & am having trouble retrieving the files from the backup disk. If someone has a copy they can send me I can try to copy it and burn some more 

Thanks,
Dean 

1970390amx loaned me his copy & it was a success; so I have more DVD's available.

Dean


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Posted By: Uncle Bud
Date Posted: Apr/02/2012 at 6:18pm
Dean. Will the DVD be of any help with an AMC 15?
Thanks, Buddy


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Buddy

1964 American 440H "Tortue Grande Vitesse"


Posted By: 1970390amx
Date Posted: Apr/02/2012 at 8:21pm
Originally posted by Uncle Bud Uncle Bud wrote:

Dean. Will the DVD be of any help with an AMC 15?
Thanks, Buddy
similar procedure, different specs, If you have never seen a diff rebuilt it will be a lot of help.

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1970 390 4speed Bittersweet shadow mask AMX
1970 Amx missing most everything, or in a box


Posted By: rogue_66
Date Posted: Mar/19/2013 at 8:09pm
Well...it only took me a year; but I finally burned some more copies of the AMC 20 rebuild DVD. They are available once again. Send me a PM if you are interested. Same price...$10.00 + shipping.

Cheers, Beer
Dean


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Posted By: Uncle Bud
Date Posted: Mar/20/2013 at 2:27pm
Dean, The DVD was a big help in rebuilding the AMC 15 in my '64 American.
Thanks, Bud


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Buddy

1964 American 440H "Tortue Grande Vitesse"


Posted By: 1970390amx
Date Posted: Mar/20/2013 at 6:41pm
Originally posted by Uncle Bud Uncle Bud wrote:

Dean, The DVD was a big help in rebuilding the AMC 15 in my '64 American.
Thanks, Bud
I am the voice you hear on the dvd, and my wife says I am no help at all


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1970 390 4speed Bittersweet shadow mask AMX
1970 Amx missing most everything, or in a box


Posted By: ambassador401
Date Posted: Mar/28/2013 at 9:13am
This is really great dvd, Thanks guys!


Posted By: 5_AMXS
Date Posted: Apr/05/2013 at 6:40pm
PM SENT


Posted By: amc'snjeep's
Date Posted: Apr/05/2013 at 9:47pm
PM sent

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70 javelin bbb 390 4spd
70 javelin tijuana tan base model 390 4 spd
69 Amx red with saddle leather 390 4spd
70 amx 390 4 spd   68 amx 390 4 spd
68 american
77 j20 401


Posted By: amcamx70ny
Date Posted: Apr/05/2013 at 10:05pm
Is there a supplier for the shims that go on the outside of the cup (or race)? The 1130's by Ratech appear to go on the inside, between the bearing and the carrier.... not between the cup and the housing.

...Found my answer. The 1130's are correct - just not exact to the originals as the inner diameter is smaller. I believe these will work fine.



Posted By: amx-nutt
Date Posted: Sep/01/2013 at 7:57pm
Hello Dean, you still selling those AMC 20 rebuild DVD's? If so can your friend to the north, Canada Eh! purchase a copy? Thanks, John


Posted By: FSJunkie
Date Posted: Sep/01/2013 at 8:01pm
All I can say is you better have a MASSIVE bench vise bolted down to a heavy table that is lag-bolted to the concrete floor when you try to rotate the case with new clutch packs in it. I have a 5-inch vise and almost broke it clamping it tight enough to the axle shaft to keep it from spinning.

That's with the two-spider limited slip, the four-spider might be easier.

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'66 Marlin: 327/T10/3.54 Twin Grip
'72 Wagoneer: 360/TH400/3.31
'73 Ambassador: 360/TF727/3.15
'77 Hornet: 232/TF904/2.73
'84 Eagle: 258/TF904/2.73


Posted By: rusty71sst
Date Posted: Sep/02/2013 at 1:05pm
Hi any videos still available? Thanks Steve in Ga.

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amc is the torque master!


Posted By: rogue_66
Date Posted: Sep/12/2013 at 10:56pm
Originally posted by rusty71sst rusty71sst wrote:

Hi any videos still available? Thanks Steve in Ga.

I'm burning some more copies tonight. Need to print up some more jackets, so by the weekend I should have about ten copies ready to ship. I'll respond to PM's at that time.

Beer
Dean



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Posted By: bertmorton
Date Posted: May/23/2015 at 9:33am
PM sent

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1969 AMX 390
2002 Corvette
1969 Chevelle SS396
1965 Corvette


Posted By: captscot
Date Posted: Jul/11/2015 at 11:51pm
Hi, Though this post is several years old, your knowledge of the AMC 20 Twin Grip, you than most might be able to answer this question. I have a '72 Javelin with an AMC 20 single grip 2.87 differential. Would it be possible to swap out my differential and put in a twin grip? Your DVD would be a great education to do this procedure.

A second part question, your familiar with the twin grip, I was under the impression that the AMC 20 twin grip contained clutch discs in addition to gears, bearings. Someone right now in the group's Parts For Sale section has a "Twin Grip" for sale with a photo. This looks like only a matter of various gears, no clutches. Is this the correct Twin Grip to put in a 1972 axle/differential case?

Thanks much, Scott

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1972 Javelin AMX - orig owner
1985 Grand Wagoneer
1967 Jeepster
1968 Jeep Gladiator
1959 Jeep CJ5
1929 Marmon model 68


Posted By: 1970390amx
Date Posted: Jul/12/2015 at 1:55am
If you are talking about the one ant has for sale. yes it is a 71 and newer factory twin grip.

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1970 390 4speed Bittersweet shadow mask AMX
1970 Amx missing most everything, or in a box


Posted By: tufcj
Date Posted: Jul/12/2015 at 7:48pm
Originally posted by captscot captscot wrote:

Hi, Though this post is several years old, your knowledge of the AMC 20 Twin Grip, you than most might be able to answer this question. I have a '72 Javelin with an AMC 20 single grip 2.87 differential. Would it be possible to swap out my differential and put in a twin grip? Your DVD would be a great education to do this procedure.

A second part question, your familiar with the twin grip, I was under the impression that the AMC 20 twin grip contained clutch discs in addition to gears, bearings. Someone right now in the group's Parts For Sale section has a "Twin Grip" for sale with a photo. This looks like only a matter of various gears, no clutches. Is this the correct Twin Grip to put in a 1972 axle/differential case?

Thanks much, Scott


Through 1970, AMC used the 2 piece carrier with 4 spiders (Dana Power-Lock). 1971 up, they used the one piece carrier (Dana Track-Lock). Both were sold under the AMC trade name "twin-Grip". The one in the for sale section is the Track-Lock. It has clutches between the carrier and side gears. The trouble with those is the outside clutch rides against the case, and usually if the unit needs a rebuilt the case is out of spec (worn). The one piece units aren't known for their longevity.

Bob
tufcj

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69 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


Posted By: Jercos360
Date Posted: Aug/26/2015 at 4:46pm
I just put a twin grip in and there is a lot of axle play, ateast a 0.25 in! Looking at the open and the posi diffs the open has a much wider thrust block which I believe is why I have so much slop. Is there a part I am missing? Any help would be greatly appreciated!


Posted By: 1970390amx
Date Posted: Aug/26/2015 at 7:51pm
I dont know what you own or what you put in it but the factory twin grip 70 and older is a two piece housing and the thrust block is a small two piece part held together with a 1/8" roll pin it falls out very easy. if you need a picture ask and I will dig one up.

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1970 390 4speed Bittersweet shadow mask AMX
1970 Amx missing most everything, or in a box


Posted By: Jercos360
Date Posted: Aug/27/2015 at 5:08am
Sorry I have a 70 hornet, I'm putting a 20 from a 71 hornet because I had the smaller rear originally. I got a split case diff from my uncle, so I'm not sure what it came from.
http://youtu.be/MHSVHSoieak
If the link doesn't work I'll load pictures tonight, but that's what my diff looks like. My axles go in to the spider gear center, which is thinner than the thrust block on the open diff which is why I think I have so much axle play.


Posted By: 1970390amx
Date Posted: Aug/27/2015 at 2:30pm
You are missing this piece, you can but them on e bay. search for 8 3/4 thrust block same piece as AMC


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1970 390 4speed Bittersweet shadow mask AMX
1970 Amx missing most everything, or in a box


Posted By: Jercos360
Date Posted: Aug/27/2015 at 6:18pm
Yep I definitely don't have that lol thank you so much!!!


Posted By: 360Rogue
Date Posted: Jan/14/2016 at 8:34am
PM sent


Posted By: DoughertyAMX
Date Posted: Apr/08/2018 at 8:43pm
If these are still available, I'll take one!  PM sent, I know this post is a few years old.


Posted By: rogue_66
Date Posted: Apr/08/2018 at 10:33pm
Yep...found a stash of unclaimed copies Smile.

Cheers,
Dean


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Posted By: captscot
Date Posted: Apr/09/2018 at 2:49pm
Hello Dean, If you have some copies of the CD/DVD I am interested in one.  PM me with details.

Thanks Scott


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1972 Javelin AMX - orig owner
1985 Grand Wagoneer
1967 Jeepster
1968 Jeep Gladiator
1959 Jeep CJ5
1929 Marmon model 68


Posted By: TX390AMX
Date Posted: Apr/09/2018 at 4:38pm
PM sent

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Terry
68 AMX 390 4 Sp (X3)
68 Jav, 72 Jav 401/4 sp project (son-in-law)
72 Jav SST 360/727 (daughter)


Posted By: Orangepeelout
Date Posted: Apr/18/2018 at 11:23am
Hi Dean,
If you still have the video (dvd?) I would like to have one, just need to know where/how to send money.
Regards,
Bob Bowers
robertbowers7080@msn.com


Posted By: green70AMX
Date Posted: Apr/18/2018 at 3:09pm
Hi Dean,
 If you still have a copy of this video I would be interested in getting it. Send me the info and I will paypal the funds shipping zip is 23435 thanks Robert 


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green70AMX



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