[Amc-list] 1968 Javelin - Amc/Dana mod. 20 rear end QUESTION

["Armand Eshleman" <aje1@xxxxxxxxxxxxxxx>]

I agree with everything Andrew says except the part about all hubs are the
same. Well in fact they are the same as far as fitting onto the splined end
of the axle shaft. But some Jeeps, if not all of them have a different lug
bolt pattern than the AMC cars.
I have a Jeep AMC 20 axle here that has a 4-3/4 or 5 inch lug pattern with
five lug studs on the hub. To the best of my knowledge all AMC cars used a
4-1/2 inch spaced five lug pattern. I suppose one could have a Jeep hub
redrilled and the newly drilled lug stud holes splined for the 4-1/2 inch
pattern. Not sure how much that would cost................
Might be cheaper to just buy a set of one piece axles from one of the rear
end specialists.
I dunno............


As far as differentials are concerned IIRC the 2.72 ratio gearset used a
different carrier than the 2.87 to 3.08 (I think) and the higher numerically
numbered carriers used a different unit than the 2.87 to 3.08. Same goes for
the twin grip or track loc carriers.
The key is easily purchased for a little bit of money at any Mopar dealer
under a Jeep part number. I believe you must purchase more than one at a
time.

Armand



----- Original Message ----- 
From: "Sandwich Maker" <adh@xxxxxxxxxxxxxxxxx>
To: <amc-list@xxxxxxxxxxxx>
Cc: <mkemper@xxxxxxxxxxxxxxxxxxx>
Sent: Thursday, February 19, 2009 12:03 PM
Subject: Re: [Amc-list] Fw: 1968 Javelin - Amc/Dana mod. 20 rear end
QUESTION


> " ----- Original Message ----- 
> " From: Kemper, Mike
> " mkemper@xxxxxxxxxxxxxxxxxxx
> "
> "
> "    Good morning Eddie,
> "  I have two questions for you, First, Will a Dana/AMC Mod. 20 Twin
> " Grip rear end out of a 73 Javelin fit right into a 1968 Javelin?
> " Second, Do you have a Wheel Hub & Key for a standard model 20 rear end
> " (not a twin grip differential) for my 68 Javelin. I stripped my hub
> " out, and sheared the key.
>
> 1. afaik dana has no connection with the amc20 rear.  they did take
> the amc15 over as the dana 35, but the dana 20 is a transfer case from
> the '60s and early '70s.
>
> 2. iirc the '71-4 javelin/amx rear is wider than the '68-'70.
> hornet/gremlin/concord/spirit amc20s are the same though.
>
> you could always just swap the twin grip diff in.
>
> you can also get lots of twin grip, posi, tru trak, and other diffs
> for the amc20, thanks to the jeep market.
>
> 3. hubs and keys are the same on all amc20s.  axle shafts are the same
> for open and twin grip diffs.
> ________________________________________________________________________
> Andrew Hay                                  the genius nature
> internet rambler                            is to see what all have seen
> adh@xxxxxxxxxxxxxxxxx                       and think what none thought
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