Decreasing RPM at High Speeds


ty.forestcom

Forum Member

Joined
May 27, 2025
Messages
59
Points
101
City
USA
Vehicle Year
1988
Transmission
Manual
1988 Ranger 2.9L, 2wd Standard Cab Long Bed.

Good Afternoon everyone.

So my Ranger I believe has 3.73 gears. I’ve got a FM132 and 2.9. The truck has a good bit of torque under 45 mph. I cruise on the highway at about 2500-2700 rpms, ~ 60-65 mph. I don’t care about low end torque at all. I’d like to be able to cruise at least 75 but wouldn’t mind 80-90 mph. (All suspension is new, it’s very low and handles great). Tires are 225/55-15. 8 inch wide, Billet Welds. I need to be under 2500 for long drives. I am planning to drive cross country this summer and need a solution.

I am thinking of swapping my gears to 3.27 or even 3.08 if possible. Has anyone had experience with this? I have a 7.5 rear axle. Can’t find much online on someone else doing this, is it as simple as I’m hoping or going to be a job?

Thank you,
Tyler
 

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