Hintz

For drag racing whats the better BUILT Auto or which one would you put behind your CTD.

cincydiesel

If I had to choose between the factory trannys I would tke my chances with either the 68rfe or the Allison.

BigDiesel396

Ill take option 5 Bob and go with a 47RH.....

chrigu

hi guys

if right the 68 re trans have electronic problems?


thanks

chris

Dartmouth 12V

For strictly drag racing, the 48re is probably the best on the list. You don't need 6 gears for a drag race and since the 48re is designed around 4 gears, it has better spaced ratios.

If you want to tow, that is another story. A 6 speed transmission is going to be a lot better so you would choose either the allison 1000 or 68rfe.

slowflyer2112

For towing I'd go with a Ally 2400 5spd with 3.54s or 6spd with 4.10s

It has a better spread then the 1000 but a lower 1st

Lil Dog

For drag racing, the Allison is a dog.. The shifting mechanics in the tranny are the time determining factor. There was a great post a few months back on how the Allison actually shifts and its NOT a drag tranny.