Even with 3.55s and 31'' tires on the automatic transmission, I rarely see more than 2500. Even if accelerating hard. Maybe 3000 if I'm really trying to get up to speed quick. Don't need to. My parents always had manual 4.0s. I found that there isn't much reason to go above 3500 or 4000. They just do not make power up there. Seems with a 5 speed, 3500 is the sweet spot to shift.
Originally Posted By: 440Magnum
Finding enough road to redline the R/T or SRT for any length of time is challenging. But I manage to do it every few hundred miles :-p The 69 R/T will lay down a black fog of carbon dust when I do if its been too long since I last let it clear its throat. The Ram 4.7 gets wrung out almost every time I drive it, just because the 4.7's power peak is so high up there and its such a big vehicle. I rarely redline the Cherokees either, Miller... not because I think they'll break (you know I don't believe they're any more likely to break a piston than anything else, but that's another debate ;-) ) But they hit their torque peak 2000 RPM below redline anyway, so there's no POINT in getting above 4k at the most. The stick (99) actually is quicker if you short-shift it. I've tried it both ways, the 4.0 is smooth as silk all the way to the rev limiter (it IS a straight six, after all) but it just isn't pulling hard and takes a LONG time to get from ~3500 or 4000 the rest of the way to the redline. PS- if I ever DO break a piston skirt in one of the 4.0s, I promise I'll announce it here and eat plenty of crow. But aint gonna happen...