Re: [Amc-list] Looking for a torque tube T-96 trans w/OD

[Frank Swygert <farna@xxxxxxx>]

All 56-62 Rambler six cylinder engines/cars use the four point mounts -- two on a lip under the timing cover and two under the bell. Big cars and Americans are the same. 63 Americans use the same four point system. 63+ big cars and 64+ americans use the now familiar "Tri-Poised Power" mounting system (that's where the name comes from) -- one mount on each side of the engine either entered or a little forward of center, and one under the trans. There's no difference in automatic trannys, just manual. 

Tom mentioned that the trans to bell bolt pattern is different -- the Tri-Poised cars have a "taller" pattern than four point mount cars. The side to side dimension is the same, but the Tri-Poised trans has the lower bolt holes much lower on the bell to give the motor/trans unit more rigidity. So you need the bell and trans for four point or Tri-Poised cars. 

The speedo cable is different also. On the older bodies the speedo cable gear is on TOP of the output shaft, on the newer ones (63+ big, 64+ small) the gear is on the BOTTOM of the output shaft. This means the cables turn in opposite directions! The drive gear on the output shaft is the same though. To swap between the two you have to have the correct output shaft housing (tailshaft housing). That's the only difference. I discovered this when putting a 65 M-35 auto trans in a 63 American. 

The manual trannys are the same between torque tube and open drive cars of similar years. The only difference is the torque tube adapter vs. a seal adapter on the OD unit (the open drive car has a short round seal adapter, the rear seal is in the torque tube adapter on big cars) and the tailshaft housing on non-OD cars (with or without a torque tube flange).  


---------------
Date: Sat, 05 Jul 2008 12:20:43 -0700
From: Tom Jennings <tomj@xxxxxxx>

oldcars@xxxxxxxxx wrote:
>     Since the Overdrive T96 should be a bolt in, I am interested in seeing
> whether anyone has a torque tube T96 which they would sell. I guess that I
> will see whether Mike can get his part, since mine is (apparently) complete
> and the '67 T96 gearbox should hopefully bolt up to the '62 tailshaft &
> housing and put mine back on the road. Just thought I would see whether I
> could upgrade to OD while I was at it. 


Others here may know details, but you might need to double-check the 
rear motor mount business, and speedo location.

62 is different than 63-up, which is two mounts under the motor left 
right, an only one under the trans tail. 62 has two mounts in rear, 
right? I forget what the 62 "big car" uses, but the American the rear 
mounts are on the bellhousing, so for that car either would work. This 
business is easily checked before you buy.

Frank points out that the speedo gear and cable comes out of the TOP of 
the trans on one set of years/models, and out the BOTTOM on the other. 
Bottom might work in a "top" car, but not vice-versa.


Sorry to be a bummer!

Yeah, the OD would be a drop-in, and the under dash cable for it easy. 
But you really need to change the axle ratio at the same time, six or eight.

-- 
Frank Swygert
Publisher, "American Motors Cars" 
Magazine (AMC)
For all AMC enthusiasts
http://farna.home.att.net/AMC.html
(free download available!)

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