GM 6.0/4sp vs. 8.1/Allison vs. 6.0/6sp
Hi all. My Towrig in Sig is getting a little long in the tooth. We just bought a New to us Toyhauler which is quite a bit heavier than our old trailer and my truck is hating life lol!! We were pla...
Forum Discussion
Brisk wrote:jmp wrote:
I have a 2003 GMC with the 8.1/Allison w 4.10 ratio with 37k miles (extra cab) towing similar weight. It tows 12-13k with ease...you just use more gas on the hills! I could not imagine a 6.0l, regardless of trans, towing this amount of weight. Keep looking for the 8.1. They are out there.
That is good info to have. Thank you. Can you run in OD on the flats pretty easily?
Yes, it will tow in OD on flat ground especially when empty. It will pop out of OD on moderate inclines though. If you can find an 06-07 with the Allison 6-speed, that would be ideal. It is thirsty though even when not towing but I don't care since the motor is bulletproof.
