I've seen this in a magazine a friend brought back from his last trip to the USA :
http://www.tciauto.com/Products/6x/
The magazine ad said they had a Chrysler bellhousing in the works.
TCI says it can take 850HP, but no mention of maximum torque anywhere. The trans is based on a GM 4L80E, gears are 2.97, 2.23, 1.57, 1.18, 1.00, 0.75.

It may look like an alternative to other overdrive auto offerings (4-speed auto from Keisler, Gear Vendors on a 727)



Since I have probably killed the input shaft bearing on my TKO-600 (drag racing just once with properly sized, brand new, race tires), I may be considering switching back to an auto transmission later this year.

I'm wondering about fitment though...

None of the overdrive suppliers seem to give much info about the real-life durability of their transmissions in a drag-racing situation (although I've heard some good things first-hand from two different Gear Vendors users).

In other words, which auto transmission would survive in a 10 to 11 second car, raced 5 or 6 times a year, with an overdrive for the highway, and *possibly* useable on a road-race track?
Am I chasing unicorns?

Hello fbernard,

Have you looked at this thread. It is a 5 speed but will do what you want. I mean Passon's new product not the McLeod. I don't think the McLeod could handle your needs. Read JamiePasson responses.

https://board.moparts.org/ubbthreads/show...part=1&vc=1

Damon

Awesome potential, but it is going to be very expensive.

I would go with a 2004r from California Performance Transmissions. Smaller, lighter, less expensive.

http://www.cpttransmission.com/

http://www.carcraft.com/techarticles/ccrp_0903_th_200_4r_transmission_build/index.html

http://www.carcraft.com/techarticles/ccrp_0909_overdrive_transmission_swap/index.html

I saw that ad too, 6 speed auto with a Chrysler bellhousing, all the parts needed, flywheel with a ring gear, converter, even the shifter....