Thor Forums

[Chance]

Originally Posted by DLM1965

.....cut.... Should I be doing something different than just leaving transmission in Drive and letting the coach struggle? And, how high can the RPMs safely go?

What do you mean by "struggle"? High RPMs? Having to push down a lot on throttle to go up hill?


Your engine is rated at a maximum of 305 HP at 4,250 RPM, so unless you are in a big hurry, there is little to gain by going much beyond 4,000 RPMs in the first place, whether it's safe or not. Your ears will also thank you.

I personally go a step further. The V-10 engine in your motorhome is rated at 420 lb-ft of torque at 3,250 RPMs, which is 260 HP. Since that's 85% of maximum power, I rarely go much above 3,250 to 3,500 RPMs climbing long grades; unless in a big hurry for some reason.

Tow Haul as suggested will help some, but ultimately it's the much higher weight of a motorhome for each engine horsepower that makes them accelerate and climb slowly compared to cars and SUVs. If that's what seems like engine is struggling, it's just normal part of driving a large and heavy motorhome.