Quote Originally Posted by THEFERMANATOR View Post
If you have an 8.1L though, you CAN swap in a GEN IV TCM into it and 6 speed trans and wiring and have a 6 speed as the SUNCOAST kit doesn't work for gassers but the GEN IV 8.1L TCM does talk in low speed J1939 can like teh older 01-05 trucks used(all of the 8.1L's used low speed data).
I have a early 2004 8.1L/Allison (1000PK) the numbers on my TCM are PN 29537441 11/19/2003 S/N: BKDUTCM333230962 Brodcast Code 9833 230962 Service Number 15768288

I am sure that tells you anything, but I was wondering just what exactly I need to convert over to the 6 speed. I do a lot of driving and squeezing more MPG out of my truck would be very helpful.

Thanks
Ryan