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
I had the 8.1 with 4sp and 4.10.
I find the 6.0 with 6sp and 3.73 sufficient for towing, and 30% better fuel economy.
I think a 6.0 with 6sp and 4.10 would work ok. The 8.1 uses oil between changes.
I find the 6.0 with 6sp and 3.73 sufficient for towing, and 30% better fuel economy.
I think a 6.0 with 6sp and 4.10 would work ok. The 8.1 uses oil between changes.
