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Rear end for hornet.

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TommyZ View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote TommyZ Quote  Post ReplyReply Direct Link To This Post Topic: Rear end for hornet.
    Posted: Dec/01/2016 at 12:30pm
what is a good alternate posi choice for my hornet. Can not find a twin grip...the ones that I do find people want way too much and they have to be completely rebuilt.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote 6speedamc Quote  Post ReplyReply Direct Link To This Post Posted: Dec/01/2016 at 1:42pm
Whats the budget? amc 20 w/twin grip to fit your Hornet are typically 400-500 range...twin grips in them alone are 300-350...Ford 8.8 I hear people use...I have a 3.15 open rear out of my Gremlin I would sell reasonably...have a twin grip unit I could sell separate to it as well...I have a moser axle 3.31 twin grip I may sell if the price is right...in my Gremlin currently...
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Traveller Quote  Post ReplyReply Direct Link To This Post Posted: Dec/01/2016 at 1:56pm
There are multiple options thanks to the Jeep guys.   Everything from a Spartan locker (around $250) up to an Auburn selectable locker for $735. Detroit limited slip, Auburn limited slip, etc. The Auburn selectable locker would be my choice for a street/strip car.   It's a cone-type limited slip, and has an electrically controlled locking function.   Both the Detroit and Auburn have cone-type options. Those split the power better.

There are a number of ratcheting locker models.   I run a Richmond Powertrax in one of our cars.   It's a ratcheting locker, but has synchros for quiet operation.   They also make a less expensive Lock-Right option, but you'll hear it make noise on corners. ]

Street driving with a locker is pretty seamless under most conditions, except accelerating in corners. And by that, I mean tighter corners mainly.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote TommyZ Quote  Post ReplyReply Direct Link To This Post Posted: Dec/01/2016 at 5:03pm
Dan...I know you have some but NY is just too far. Thanks for offering though
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Rebel Machine Quote  Post ReplyReply Direct Link To This Post Posted: Dec/01/2016 at 5:11pm
Posted a twin grip AMC 20 from a '68 AMX for sale some time ago. Might be an inch narrower than the Hornet though. Also have a standard differential from a '70 Javelin. Could transplant the carrier.

http://theamcforum.com/forum/68-amx-twingrip-rear-end_topic82807_post739955.html?KW=#739955


I'm six hours from Kenosha.

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Post Options Post Options   Thanks (0) Thanks(0)   Quote 1970390amx Quote  Post ReplyReply Direct Link To This Post Posted: Dec/02/2016 at 12:38am
What is in your car now?

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Post Options Post Options   Thanks (0) Thanks(0)   Quote 71hornet6 Quote  Post ReplyReply Direct Link To This Post Posted: Mar/31/2017 at 1:53pm
I have a Detroit TrueTrac non slip helical differential which costs about $600. Instead of a clutch it uses helical gears to balance power distribution to the rear wheels. Because there is no clutch it requires no maintenance and always provides the most traction possible. Is it worth dealing with the twin grip? I decided to avoid it and just get the truetrac
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Post Options Post Options   Thanks (0) Thanks(0)   Quote 6PakBee Quote  Post ReplyReply Direct Link To This Post Posted: Mar/31/2017 at 8:34pm
Originally posted by Rebel Machine Rebel Machine wrote:

Posted a twin grip AMC 20 from a '68 AMX for sale some time ago. Might be an inch narrower than the Hornet though......


I thought the Hornet rear end was narrower than the AMX?  Or am I missing something here?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote nothingface5384 Quote  Post ReplyReply Direct Link To This Post Posted: Apr/15/2017 at 4:56pm
not sure on last question, but the spartan locker wont work..thread pitch is different according to amccars forum...which I cant get registered to...
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Post Options Post Options   Thanks (0) Thanks(0)   Quote jpnjim Quote  Post ReplyReply Direct Link To This Post Posted: Apr/16/2017 at 10:05am
Originally posted by nothingface5384 nothingface5384 wrote:

not sure on last question, but the spartan locker wont work..thread pitch is different according to amccars forum...which I cant get registered to...

I don't believe AMC (Dana) ever changed the thread pitch on their 29 spline AMC Model 20 axle shafts.

If they did, would it have been a year to year thing, or an AMC vs Jeep thing?

I have a used M20 Detroit that came out of a CJ that will go into a 72 Javelin rear at some point, and I'm not anticapating any thread pitch issues (but will be sure to post if I do).

I've never heard anyone asked if they wanted Jeep or AMC thread pitch when ordering M20 shafts.
Or an early/late thread pitch.

AMC M20 29 spline shafts ARE different (bigger) than Mopar/Jeep 8.25" 29 spline shafts,
so maybe that's what they were referencing (?)
71 P-code 4spd Javelin/AMX
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