It's all about the math. Tire size matters. Most trucks with a T5 have a 28" or 29" diameter tire. Multiply the tranny gear X the rear gear. When choosing overdrive, getting the final number between 2.6 and 2.8 will make you smile the most. Having 1st gear X rear diff between 9 and 12 will make it feel good off the line without having to shift too quickly.
Only the V8 Camaro/Firebird T5s have the 0.63 overdrive. They also have a 2.95 first gear.
So your 4.10 rear combined with either a 3.75 or 4.03 first gear (found in T5s from V6 Camaros and S10 trucks) will make first gear seem like a granny gear. 4.10 X 3.75 = 15.375. Worse if the first gear is 4.03.
I will let you do the math for the V8 Camaro T5. It has 2.95 for 1st gear and 0.63 for 5th and is a close ratio tranny. Except the drop from 4th gear to 5th is a HUGE 37%.
Last edited by Lugnutz; 07/21/2017 6:32 PM.
