You can create an RPM/MPH graph for each gear. Identify the power band (example 1800 to 2200) then identify the best shift points.
Ideally you want the engine RPM and mph to stay "up" between gear changes for highway driving.
Not the wind-up and slow down shifting of a gravel hauling truck, for an exaggerated example.
Your second gear is your first gear. 3.57 X 2.73 = 9.75 is a decent combined ratio for getting the truck moving.
There will be a big gap between second and fourth gear that the third gear has to cover (need to downshift/upshift).
This is where the extra gear of the T5 comes in handy.
Fourth gear is 1:1 so your rear axle ratio is the final combined ratio (1 X 2.73 = 2.73).
First (7.05 X 2.723 = 19.25) and reverse (6.78 X 2.72 = 18.44) will "jack rabbit" so go easy on the gas pedal.
Last edited by buoymaker; 12/20/2022 4:59 AM.
