I agree with Hershey. I have a 34' Holiday Rambler with the 275 ISB and Allison. I heard the same thing about being a dog on long hills. I can pull any hill at 35-40 the Conejo grade, the 40 coming out of Needles and the Cajon pass heading up the 15. I'm on those hills for 10 minutes or so. I don't mind chugging up at those speeds, I'm still flying past semi's!
The sweet spot is 62 mph as stated, about 1700 rpm. I get a solid 10 mpg. I'd stay away from the chips, and mods. I had a friend with Banks, they're great products but once you start..............
