Don't know if this is an OK place to post this question, hopefully it's OK.
I recently read some stuff on gear ratios and started wondering. Can you change out the transmission gears from a close ratio to a make a wide ratio? If so does anyone have an idea how much a rebuild on a toploader should cost? I know I could sell my close ratio and buy a wide, but my close is a RUG-AJ which has the longer tail piece and the 1 3/8 input output shafts. Is the 1 3/8 really that big of a deal if my car only has 450ft lb torque?
The reason I ask is because right now I have a 2.32 1st gear and a 3.89 differential. 2.32 x 3.89 = 9.02 SLR - a 2.78 (wide ratio 1st gear) would give me a 10.9 SLR which would be much better out of the hole, especially when I get a posi-trac diff. I was thinking about going to a 4.3 diff, but that would only give me a 9.97 SLR with my close ratio trans and set my RPM's really high at the finish line.
I want the car to have some drivability on the street and interstate and anything taller than the 3.89 rearend would really make that tough. But I also want it to jump off the line. Right now I'm at 2600ish rpm to go 55 mph.
thx, Dave J
I recently read some stuff on gear ratios and started wondering. Can you change out the transmission gears from a close ratio to a make a wide ratio? If so does anyone have an idea how much a rebuild on a toploader should cost? I know I could sell my close ratio and buy a wide, but my close is a RUG-AJ which has the longer tail piece and the 1 3/8 input output shafts. Is the 1 3/8 really that big of a deal if my car only has 450ft lb torque?
The reason I ask is because right now I have a 2.32 1st gear and a 3.89 differential. 2.32 x 3.89 = 9.02 SLR - a 2.78 (wide ratio 1st gear) would give me a 10.9 SLR which would be much better out of the hole, especially when I get a posi-trac diff. I was thinking about going to a 4.3 diff, but that would only give me a 9.97 SLR with my close ratio trans and set my RPM's really high at the finish line.
I want the car to have some drivability on the street and interstate and anything taller than the 3.89 rearend would really make that tough. But I also want it to jump off the line. Right now I'm at 2600ish rpm to go 55 mph.
thx, Dave J
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