K3WE
Missouri
Senior Member
Joined: 05/24/2005
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To date, I have towed our 27 ft TT with three Suburbans:
1. 1/2 ton, 5.7, 4-spd, 3.42
2. 1/2 ton, 5.7, 4-spd, 4.10
3. 3/4 ton, 6.0, 6-spd, 3.73
Their pulling ability was not all that different. Vehicle 1 and two would almost never hit 4th gear, unless going down a good hill. Going up a mild hill would often give you second gear in both. With vehicle 3, what is different is that it's gear 4 (not 5) that you are stuck in for most of the time. I think 4th is even a little lower than 3rd on the 4-speed vehicles. Kind of dissapointing- I wish there was a gear that gave about 3000 RPM at 65 to 70.
Must not be that much difference in HP and torque, and in some instances, similarities in final gear ratios.
I don't want to say there's zero affect from any of these variables- but it has not been of much practical significance.
What is different is the performance of the suspension- instead of being seriously squatted, the TV takes things much more in stride. (Yes, the WD was used and adjusted for all setups).
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