is there any way to tell what the gear ratios are in a stock 4 speed transmission for a GT? or are they all the same? i have to change the transmission in my car because its noisy and pops out of 4th gear all the time. it did 3500 RPM at about 70 mile an hour is this about right? i'm hoping i can take numbers off the transmissions and compare the gear ratios to see if i'm goin higher or lower gear....i have a few transmissions to choose from so i can get the gears i want hopefully unless they're all the same.........thanks in advance for any input.