ive got RPM problems

[minihoff16]

Ive got a '95 Ford Probe 5 speed. its a 2.5L V6. when im doing 100 km/h = 60 mph my car is reving at 3000 RPMs, in 5th gear. is there any way to lower my RPMs? Could this be hurtin my engine or tranny?

[bhazard]

Im not sure which trans your V6 has but I know the G-series mazda trans has several 5th gears available. I swapped a .71 5th from a Mazda 626 in place of my .8 5th in my Mercury Capri trans (G25MR). It dropped the rpms at 60 about 300-400. Cruises 60 at about 2500 now.

[wyatt]

Larger diameter tires will change your final drive ratio. the only problem is that it changes them all, so slower acceleration could be a downside.