Mike Romain wrote:
> I have a 258, T-5 with 3.31 gears turning 33x9.5" BFG muds (no metric
> equivalent for the bigger off road sizes that I know) and at 65 mph in
> 4th I spin 2300 rpm. If I use 5th it drops to 1750 and my gas mileage
> drops radically as well.
>
> That 2300 rpm seems to be a nice 'sweet spot' for my engine with the
> best mileage (23 mpg) and tons of punch if needed. It will hold it up
> any highway hill I have hit.
>

Thanks Mike. Mine has the 258, T-5, and 31x10.50s on it, also with 3.31
gears. Mine runs about the same as yours. But, mileage stinks in
either. RPMs in 4th are too high, 5th too low. I am getting ready for
another round of upgrades and was thinking about regearing the axles
since I really don't need bigger tires or a lift.

Any idea what the factory RPM was supposed to be in 5th at 55 or 60?