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Best AMC 20 Carrier |
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RebelSteve 
AMC Fan 
Joined: Feb/01/2021 Location: Stanchfield, Mi Status: Offline Points: 20 |
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 Topic: Best AMC 20 CarrierPosted: May/18/2022 at 7:09pm |
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Hello all,
I am wondering what would be the best/strongest twin grip carrier to use? Here's the deal I have a 68 Rebel that needs a twin grip. It's a south Carolina car so the housing is mint but no twin grip. So I'm headed to the junkyard but I have all these questions. What's the best ? What about some Jeep stuff? That would be easier to find and if it was stronger I'll take it. Are they all interchangeable? Trac-loc? Keep in mind once I find it I will completely rebuild it. Thanks guys |
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Repsolroger
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Joined: Aug/23/2021 Location: washington Status: Offline Points: 375 |
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Posted: May/18/2022 at 7:23pm |
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Following this thread
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1969 sst javelin restomod
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304-dude
AMC Addicted
Joined: Sep/29/2008 Location: Central Illinoi Status: Offline Points: 9082 |
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Posted: May/18/2022 at 7:40pm |
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For oem the 2 piece is best. But if you want the best Torson Gleason all the way up to 500hp (wear and tear rebuild needed). For serious hp a true locker or spool.
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71 Javelin SST body
390 69 crank, 70 block & heads NASCAR SB2 rods & pistons 78 Jeep TH400 w/ 2.76 Low 50/50 Ford-AMC Suspension 79 F150 rear & 8.8 axles Ford Racing 3.25 gears & 9" /w Detroit locker |
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tufcj
Supporter of TheAMCForum 
Supporter of TheAMCForum Joined: Jul/10/2007 Location: Watkins, CO Status: Offline Points: 4092 |
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Posted: May/18/2022 at 8:24pm |
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Factory, definitely the 2 piece carrier twin grip (Dana Power-Lock). It was only used until about 1972. After that they went with the Dana Track-Lock, which had a 1 piece carrier (still called a twin grip). The Track-Lock wasn't known for it's longevity, most were useless after 20-30K miles. All Jeep CJs used the Track-Lock in the Dana 20 (76-86), pretty sure the Wagoneers did too. If you go aftermarket, the Detroit Soft-Locker is bullet proof, but is noisy and can cause some odd pull on accel/decel. The Gleason Torsen hasn't been sold under that name since the early 80s. Detroit bought the design and sells it as the TruTrack. 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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PROSTOCKTOM
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Joined: Jun/20/2010 Location: Indiana Status: Offline Points: 2450 |
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Posted: May/18/2022 at 10:29pm |
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If you have the budget go with a Truetrac as they are an all gear driven posi and far superior to a typical posi unit that has clutches that wear out. Also a Truetrac is a unit that has great street manners compared to a Detroit Locker which is almost a spool on the street the way they work.
Tom |
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Molnar Technologies Full Service Dealer - Crankshafts & Connecting Rods
1969 AMC Rambler Rouge Race Car 1974 AMC Hornet Hatchback, Wally Booth Outlaw Nostalgic Pro Stock Race Car Project |
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1970390amx
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Joined: Jul/11/2008 Location: colorado Status: Offline Points: 3314 |
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Posted: May/18/2022 at 10:40pm |
  
Top picture is a detroit locker and a power grip. power grip is factory 71 and earlier. second picture is a 72 and newer twin grip, probably all you might find in a junk yard, cheap easy to rebuild. most say they do not last. last picture is a gleason and a truetrac
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1970 390 4speed Bittersweet shadow mask AMX
1970 Amx missing most everything, or in a box |
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Mopar_guy
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Posted: May/19/2022 at 5:14am |
X2. I have one in my 9" and it's the nicest limited slip unit I've ever used.
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RebelSteve
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Joined: Feb/01/2021 Location: Stanchfield, Mi Status: Offline Points: 20 |
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Posted: May/19/2022 at 6:56pm |
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Ok so I've read all about identifying rear ends by crawling under the car but as you all know that's not so easy in a junk yard with these older cars in the weeds or on top of each other. How about the vin number or another way?
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tufcj
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Supporter of TheAMCForum Joined: Jul/10/2007 Location: Watkins, CO Status: Offline Points: 4092 |
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Posted: May/19/2022 at 7:52pm |
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Most AMC cars with a "twin grip" had a sticker on the passenger side wheel well inside the trunk. But after 50 years it's doubtful they're still there. No other way except the codes stamped on the housing. 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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RebelSteve
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Joined: Feb/01/2021 Location: Stanchfield, Mi Status: Offline Points: 20 |
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Posted: May/25/2022 at 2:24pm |
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I picked up a late 60s power grip ( Twin grip) so I think I'm on the right track. I would like to thank everyone for their help.
Steve
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PROSTOCKTOM wrote: