AMC Model 20 rear end parts swap discussion part 99

[Marty Bricker <mbrickerusn@xxxxxxxxx>]

Randy,
  I was the one who resurrected the model 20 rear end
discussion but I'm still not entirely clear on how it
all works.  From your post you said there are series 2
& 3 carriers for passenger cars.  I'm not sure what
that equates to but, from my 74 TSM I would guess the
2 different axle sizes (8-7/8 and 7-9/16) as you said
the carriers are physically different.  I posted my
question on the AMC Forum also and one of the listers
compared carriers from a 2.87 and 3.15 rear end and
said they were exactly the same size (both are listed
for the 8-7/8 axle).  My 74 TSM lists 2.87, 3.15, 3.54
and 3.91 ratios as being in the 8-7/8 axle and 2.73,
3.08, 3.31 and 3.58 ratios as being in the 7-9/16
axle.  Unless the different carriers (series 2 & 3)
can be used in the different axles, a manufacturer who
says his gears will fit 3.08 and above should fit in
both axles and on both carriers.  It would seem to me
that the fit is based more on the carrier and/or axle
than the ratio.  Sure wish I had the different
carriers and gears to look at to clear up my
confusion.  Guess my problem is the gears on Ebay I'm
looking to buy (Richmond 3.54) and replace my 2.87
gears (74 AMX with 8-7/8 axle) I can't seem to find on
the Richmond website to verify that they will or won't
fit.  I counted the teeth on the ring gear in the pic
and they are the same (39) as the AMC listing in the
TSM.        
Marty



		
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