- Location
- Torrance, CA
For some reason, once you start hitting above 4000 repeatedly, they let go. The only 4.0s and 2.5s I have seen pop ( in person ) was when someone held them at the red line a bit too long.
Unless you're running like 23'' car tires, I don't think it's possible gear it low enough to be at a sustained 4000RPM on the highway haha.
Maybe if your engine is crap.
Comfy cruise for me is 2800 - 3200. Hill climbing is 4000 - 4500, sometimes for an extended period of time while pulling large grades while heavily loaded.
Wheeling will see bursts up to redline (Renix Jeep, rev limiter is called valve float).
My 4.0 hasn't exploded yet.