I need to do some research for a friend of mine. He bought my '65 Fastback and is going to put in an '03 Mach 1 motor and a '01 Cobra IRS w/ a roots blower. He wants to put in an auto trans so I recomended the '05 trans since it is a 5-speed.

Will this work? What is he going to need as far as electronics? I assume it will handle 450 hp. What about pulling one out of another Ford? I know the Lincoln LS is also a 5-speed. Is it the same?

Any help would be greatly appreciated.

 

Not much is known about these Auto's, and supposedly have some weak points making 450hp a questionable prospect. I'd stay away from it for that project.

Go with a previous 4 speed built by Lenco or Performance Automatic. That way he know's he'll have a car that can take serious HP if he decides to mod it more.

 

Good to know. Thanks.
BTW, do you know what the code for it is? (i.e. T56, etc)

 

Not off the top of my head, and forget about Lenco, I misspoke, they're all out racing transmissions. I can't for the life of me think of the other company I had in mind. :scratch:

Performance Automatic is on the money. The Tranny you're probably going to want look into is an AODE like this one:

http://www.performanceautomatic.com/transaode.htm

 

Thanks, guys. I'll let him know. I'm taking my '05 wheels over to him tomorrow.

 

While I really like the preformance and shifting capabilities of the new 5 speed auto.

I would definately not put the 05 auto in that car. The auto is fully computerized and matched specifically to the engine computer. I think it would be very difficult to get this trans to work properly with an older engine....

Heck, I only know of one tuner ( Alternative Auto ) that has made significant improvements to the auto shift patterns. All other tuners I have talked to seem to have that "well....." pause when you aske them about twiking the auto....

I think that you would be much better off with a custom built C4....

 

Thanks, I thought I was losing my mind. I knew it was Len-sumphin

 

I let him know what everyone said and he'll be going with the pre-'05 auto trans.
Thanks, everybody. Since this used to be my car (for 16 years!), I want it to turn out really good.

 

The 5R55S trannie in the 05 Mustang is the same trannie that is used in the 2003 - 2006 Lincoln LS and the 2003 - 2005 T-Bird. It is also used in some Ford SUVs.

You will have a problem with the 5R55S trannie.

1. It is computer controlled by the PCM in the 05. No computer = No shifts

2. I was told by a Ford trannie engineer that 350 lb ft of torque was the max for the 5R55S. (it's not HP that is important its torque).

 

That IRS conversion is going to be a lot of work & if he plans on drag racing it may not be the optimum setup. If it was me I would keep the live axle & put coil over shocks all around. The last MMFF with the 2 silver Stangs on the cover has a fellow with a Cobra that installed a live axle & auto. He is running 10's. My .02

 

Thanks, V10. That's exactly the info I was looking for.

 

Nope. No drag racing.