Auto trans recomendations

[mlplunkett]

My 67 mustang came to me with a 351 and what I assume is a C4. I have had a 428 built with a stroker package, roller rockers and lifters, aluminum heads, etc so I'm guessing the power and torque will be in the neighborhood of 450. I'm planning to stay with an auto trans and Im not going to be racing the car so nothing exotic is needed but I like the idea of something that has overdrive. What trans would you guys suggest?

[FL SAAC]

Forget about over drive you have a built 428. Get a C6 strong and reliable

[TA Coupe]

When you say 428, are you talking about an FE engine, or a stroker 351 Windsor engine?

      Roy

[shelbydoug]

Any "built" AOD, C4, C6 will work fine.

If you are looking for an overdrive though look at the 6R80. It is basically the size of the C6, has a 4.11 first gear, is close ratio, and has a dual overdrive.

Since it is intended for vehicles with a CPU, you need to use a plug in controller, but stock it handles 1,100hp.

[roddster]

My tribute car, built 428 FE,factory C6. I bought the more beefy late six pin gearing from a 90's Fomoco auto (buy that book about modifying the Ford C4/C6 transmission) AND also installed a Gear Vendors Overdrive as you either install a iron tailshaft housing to blow proof the trans, or to with the OD.

[FL SAAC]

Any "built" AOD, C4, C6 will work fine.

If you are looking for an overdrive though look at the 6R80. It is basically the size of the C6, has a 4.11 first gear, is close ratio, and has a dual overdrive.

Since it is intended for vehicles with a CPU, you need to use a plug in controller, but stock it handles 1,100hp.

Heck if we are going NEW AGE talking about installing electronics, pull that old boat anchor FE motor

Then go into a salvage yard pull out a coyote with all its helpings  followed by the installation of a whipple .

You will have the fastest restomod mustangand no old will ever catch you

But I know you really want to stay within the 60 to 80s period.

So C6 it....

[Bill]

My 67 mustang came to me with a 351 and what I assume is a C4. I have had a 428 built with a stroker package, roller rockers and lifters, aluminum heads, etc so I'm guessing the power and torque will be in the neighborhood of 450. I'm planning to stay with an auto trans and Im not going to be racing the car so nothing exotic is needed but I like the idea of something that has overdrive. What trans would you guys suggest?

Check with the guys at Performance Automatic (google them) in Hagerstown, Maryland

Things they will want to know:
General engine specs (dyno sheet for HP/torque curve would be extremely helpful)
Your specific usage (IE: street cruiser, drag racer, road racer, or ??)

Great guys and can assemble an automatic transmission for your specs and use.

Bill

[mlplunkett]

When you say 428, are you talking about an FE engine, or a stroker 351 Windsor engine?

      Roy

It's an FE built on a 428 block bored .0060 over and stroked.

[TA Coupe]

There are places that build C4 transmissions to go behind big blocks. Much lighter than a C6. I've had several transmissions built by ATO after reading about them building C4's for Racers around the country. With as much HP and Torque as your engine should be producing just use some 325 rear gears and don't worry about it.

http://www.atotransmissions.com/

      Roy

[pbf777]

    Have you ever actually witnessed the miniscule size of the clutch packs in the C4? To the best of my admittedly limited knowledge, that's why Ford Motor Co. didn't, with the exception of a small number of "light", light-duty vans, an application I never could understand, put C4's behind "big-blocks" 

    And, we were a dealer for Performance Automatic from their inception and for quite a period time, along with several other manufactures/suppliers of automatic transmissions, also have worked with several local builders whom have provided me the opportunity for 'hands-on' familiarity in the field of the "old school" (well, they weren't then) automatics; but more importantly some as actual friends, you get the "no-bull" story vs. the sale hype and the supposed "tricks" that are implied as making them more capable, and all I can say is that as long as one doesn't "push it", the C4 might work O.K. for you.    

    Scott.

[TA Coupe]

Scott, all I can say is ATO has had their C4's behind a number of championship big block vehicles.

    Roy

[pbf777]

      I'm guessing your referencing "drag-race" type vehicles in your "championship big-block vehicles", and yes, the C4 'can' be made to suffice for this sort of competition, that to a point, as the actual operational periods are rather short and servicing frequent. 

      The "light-duty van" I was referencing was an application where Ford put the C4 behind the 429, and at one time those bell housings were somewhat coveted for those wanting something lighter in weight (both as an overall stationary mass and internal drive componentry being accelerated) and resultantly faster than the C6 for a big-block (385 series), this in a lighter weight chassis (less load on the trans); but still weren't for anything making any real torque as the C4 would become a maintenance to just even a survivability challenge.   

      The bottom line is that there is only so much clutch area and running up the hydraulic pressure can only stave-off the eminent failure problem some . . . . .   

      Scott.