T-56

[The Cuda Guy]

Does anyone know if there is a difference between the T-56 for GM, Ford or Chry???  This is in ref to an ebody install.

Don

[Carlwalski]

G'day Don, I don't think the internals change but after talking to Scott @ XV I know they require a shlt load of tunnel and bashing working to fit, he made it clear it's not a drop in job. They are some stout transmissions though. Wouldn't it just be flex plate & bell housings that would be different on the install cars?

[ntstlgl1970]

location of the shifter, there are a couple of possible locations depending on the vehicle. I think there is a spline difference on the viper one, but I couldn't tell you for sure. This looks pretty interesting...

http://en.wikipedia.org/wiki/Borg-Warner_T-56_transmission

[The Cuda Guy]

So from what I can tell you would need one set up with "Dodge" internals to handle what a Mopar BB can put out?  If Im off from this please let me know.

Don

[Carlwalski]

Not sure, try t56rebuilds.com if anyone will know, they will.

[The Cuda Guy]

Thanks Carl.  Im trying to see what Im going to need to budget for in the future.  I know I would like a stick shift but I hear that the 4sp doesnt do much for the crusing.  I know gears and a lot of other things factor in.  Im just seeing what I can see.  Thanks for the help bro.   

Don

[Carlwalski]

I don't know half as much as some guys but happy to pitch in where I can.
Chryco often talks about the A833-OD, have you thought about that?

You are right, stick shifts are the best, autos are also good to, especially high hp applications.

[The Cuda Guy]

Everything I have read about the 883OD is its good but was never ment to be behiend a BB so.... that being said.  Im automaticly thinking about the headaches to come $$$.  Like I said Im trying to figure up a realalistic budget.  But yes I have thought of it.  I guess you really have to find the 883OD with the steel case because Alum ones dont last.  To me too many questions.  So far from what I can tell is that the best choice is the T-56 (yes with a floor mod) and or 883 or 727?  Its just tough trying to justify 4-5g's for an OD when I can have a 883 for far less???  Thanks again bro.

Don

[Chryco Psycho]

the T56 will require a new tunnel to fit properly , not sure on the difference between the Gm & Viper T56 though
I guess my take on this is the 833 OD is not weak & when you can buy them for $100 each & they are usually in perfect shape behind the /6 trucks buy 3-4 of them & repair them if you can break them , I raced my Duster withthe front wheels off the ground for 7 straight years with the "Weak" OD , never hurt it even after blowing up 4 - 8 3/4 diffs behind it

[Moparal]

Don, you consider the Passon hemi 4 spd overdrive kit?


266/1 first
159/1 second
100/1 third
.80/1 fourth

Fits in any 833      if you ran 410's the final would be a 328 ratio

The kit is 1695   or the whole trans is 2995

Something to consider anyways. I just picked up my extra 72 cuda 4 spd but I promissed it to sleepychallenger when he gets back from yer area.

[Chryco Psycho]

Overall my Experience with Passon has been great , HIs service is great ,the parts work properly
But it took almost 1 year to get the OD tranny from him , order it now if you want it for mid next summer 

[Moparal]

Overall my Experience with Passon has been great , HIs service is great ,the parts work properly
But it took almost 1 year to get the OD tranny from him , order it now if you want it for mid next summer 

    Or maybe I will be cruising by that area and pick it up for you

[ntstlgl1970]

To me it boils down to your realistic expectations of what you will do with the car. Are you going to take it on long trips? Are you going to run it at the track with sticky tires (slicks) and launch it hard (as in 3500 rpm or higher dump the clutch hard)? Unless you plan to drive long distances I think the 833 would be fine. If you will travel with the car, choose the T56 route, there was a company offering viper take out transmissions in the back of hot rod or phr something like that for around 1800ish. I think a viper T56 would be more than enough for your car unless you are going to go hardcore drag racing in which case it will break.

[Travis72]

There is some good info in this thread including a good link to a thread on bigblockdart.com

http://www.cuda-challenger.com/cc/index.php?topic=42101.0

Travis
72 Cuda

[ntstlgl1970]

After looking at the thread mentioned by Travis, then the wikipedia article, IMO most people don't have or won't build a motor (small block with mild RV type cam, or big block with a mild cam) that will be happy pulling a .50 or .62 overdrive on the freeway at a reasonable speed say 70mph
-especially with a carburetor-.
Just for fun, I put these numbers into a calculator using a 3.91 rear gear ratio: (28 inch tire would be like a 275/60R15)

the .50 overdrive (6th) gear ratio is for the viper T56

Input Parameters Are the Following:
Differential Gear = 3.91 to 1
Transmission Gear = 0.50 to 1
Tire Diameter (Inches) = 28.00
Vechicle MPH = 70
Computation Results:
Computed Engine RPM is 1643

Input Parameters Are the Following:
Differential Gear = 3.91 to 1
Transmission Gear = 0.62 to 1
Tire Diameter (Inches) = 28.00
Vechicle MPH = 70
Computation Results:
Computed Engine RPM is 2037

This last one has a common overdrive (4 speed auto or 5 speed manual) ratio of .76

Input Parameters Are the Following:
Differential Gear = 3.91 to 1
Transmission Gear = 0.76 to 1
Tire Diameter (Inches) = 28.00
Vechicle MPH = 70
Computation Results:
Computed Engine RPM is 2497
 
I agree with with a poster in the other thread, the 6 speed is more of a bragging thing than useful unless you build the powertrain around being able to pull these gears.

Just for comparison, for those with low profile 17/18/19" tires, many come out around 24.5" tall (thinking 275/40R17). The T56 might work out better:
 
Input Parameters Are the Following:
Differential Gear = 3.91 to 1
Transmission Gear = 0.62 to 1
Tire Diameter (Inches) = 24.50
Vechicle MPH = 70
Computation Results:
Computed Engine RPM is 2328

Once you start going in the direction of more common rear end ratios (say 3.23 or 3.55), the rpms start to get too low at cruising speed again.

Input Parameters Are the Following:
Differential Gear = 3.55 to 1
Transmission Gear = 0.62 to 1
Tire Diameter (Inches) = 24.50
Vechicle MPH = 70
Computation Results:
Computed Engine RPM is 2114

Input Parameters Are the Following:
Differential Gear = 3.23 to 1
Transmission Gear = 0.62 to 1
Tire Diameter (Inches) = 24.50
Vechicle MPH = 70
Computation Results:
Computed Engine RPM is 1923

Input Parameters Are the Following:
Differential Gear = 3.55 to 1
Transmission Gear = 0.50 to 1
Tire Diameter (Inches) = 24.50
Vechicle MPH = 70
Computation Results:
Computed Engine RPM is 1705

Input Parameters Are the Following:
Differential Gear = 3.23 to 1
Transmission Gear = 0.50 to 1
Tire Diameter (Inches) = 24.50
Vechicle MPH = 70
Computation Results:
Computed Engine RPM is 1551

I would stick with the A-833 with an overdrive gearset or a 5 speed.