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#25474 08/15/2002 7:35 PM
Joined: Aug 2002
Posts: 455
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Shop Shark
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I am having my 235 rebuild on my 52 1/2tonner and am curious which tranny options I have for swapping.
Ideally I want to hang on to the original 3-on-the-tree shifter assembly and my closed torque-tube driveshaft.
I have Patrick's 3:55 rearend and read in the catalogue about the saginaw 4speed being ideal for my setup.
Is there a tranny with overdrive, that I can use with my original shifter and driveline?
I have also seen overdrive add-ons.
Is there one that would fit my original 3speed?
I am thinking of having the overdrive lever on the floor right next to the bench, maybe.
Is something like that possible or is that just a dream of an eager to learn beginner at this?


On the road every day...
1952 Truck - 235
1948 Coupe - 261
#25475 08/15/2002 8:25 PM
Joined: Dec 2001
Posts: 21
6
Apprentice
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Siegmund52,

You are pretty much limited to what you can do because of the "torque-tube driveshaft". I haven't of an "overdrive" unit for the 1/2T, 3Spd - 4Spd trucks running the torque-tube. If you go to an open driveshaft your combinations open up quite a bit.

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#25476 08/16/2002 2:18 AM
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Thanks for the reminder. I am aware of the limitations.
Just curious if anybody can provide a basic list of tranny models from memory about what can be used with or without open driveshaft on a 235 and 3:55 rear.
Any hints?


On the road every day...
1952 Truck - 235
1948 Coupe - 261
#25477 08/16/2002 5:00 AM
Joined: Dec 2001
Posts: 21
6
Apprentice
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Posts: 21
Sieg...

Yep, it's limited, either the 3Spd or the 4Spd (SM420 with a very low 1st gear). The final drive is still 1:1.


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