Jd5203
Silver Member
crashz said:Both of my GM trucks (2004 1/2 ton and 2012 2500 gas) act rough when using tow/haul while unloaded. However, once loaded with even a moderate weight, they smooth right out. With the new truck, an empty trailer is too light (say 2000 lbs), but with my tractor on (~5000 lbs total) tow/haul performs similar to normal driving. The higher RPMS are noticed, but the harsh shifting is smoothed out entirely.
If it were me, I would run the truck in Tow/Haul mode. Thats what its there for and by doing so, you won't be guessing.
The rough shifting is because the tow/haul mode is only meant to be used with high performance such as pulling trailers. The rough shifting is because your trans while in tow/haul mode is designed to shift quicker so you get going faster while still getting high rpms because you are shifting quicker therefore the rpms aren't allowed to drop as low.