What is "Tow/Haul" ?

[donnyB7]

My gas class A has automatic trans, and on the shift lever is a button on the end. It is labeled tow/haul. What does this do?

[Mile_High]

Yes, it helps raise the shift points so you aren't "lugging" uphill.

[tweetybird2]

So do you use this toy/hall for going up a steep grade as well.

[Mile_High]

On my pickup, the tow haul was awesome. When engaged, when you tapped the brakes on a descent it would downshift, whereas it didn't do that when not engaged. As stated, it shifts at higher points. If I remember right, it also worked in harmony with the integrated brake controller for a towed trailer, but not sure if MHs have that.

[CharlesinGA]

Since you are "hauling" a big heavy coach around all the time, just put it in tow/haul and leave it there.

Charles

[afrescopXx]

Works very well with the cruise control and holding speeds descending grades.

[Lwiddis]

Tow/Haul is your friend. Use it going up and down and even sometimes on level ground.

[Steeljag]

As with the above posts, it also works very well in mountain areas by helping keep speed down while descending!

[downtheroad]

Tow Haul Explained...LINK

Probably lots of info in your manual also...

[donn0128]

Tow/haul generalle electronically alters transmission shift points. Meaning it also firms up the shifts. All designed to help keep the transmission cool when working hard.

[msturtz]

donnyB7 wrote:
My gas class A has automatic trans, and on the shift lever is a button on the end. It is labeled tow/haul. What does this do?

In general, it changes the shift points in the TCM (transmission control unit). Some transmissions do additional things but in general that is it. The TCM delays upshifts and more aggressively downshifts when in tow haul mode. The idea is to keep the engine in peak power band longer rather than upshift and lose torque and power.