music69 wrote:
If shifting to higher rpm and/or slowing down on a grade is a problem when towing, then forced induction, diesel and big blocks are the only options. All n/a gas motors are going to shift (or slow) on grades when pushed. The DOHC motors that Toyota uses are more prone to this than, say, a GM push rod, since the torque curve is pretty steep up to ~3k+ rpm, but that's how they're intended to work. They rev so quietly, that I don't see where anyone would mind? Not much louder than a turbo spooling, to me, and pretty much always quieter than a Cummins :)
Are you suggesting diesels don't slow down and scream like a banshee on the upgrades? Here's one towing a measely 13k~lbs up an interstate grade. Slowed it down, made it downshift and scream like a banshee. I don't know how anyone could drive such a migraine maker! :B
http://www.youtube.com/watch?v=-_1ZefREs0Y