I've always felt like the gears are a little short. Especially 6th on the interstate. Can the final drive ratio or 6th gear individually be changed on an SMT car?
Check this tread, it's pretty long but has a lot of info about gear ratios from a guy who thought about doing this. Should be the same with SMT, it has the same gearbox.
No, it won't match correctly when shifting. Final has to stay the same, possibly could just change out the 6th gear since there isn't ay downshift matching, but probably gonna throw a SMT code and start beeping because the input and speedo aren't matching. Our ECU's for the SMT are matched to the transmissions.
i ended up going with 50 series tires in the back to see if that would help. It does, and no SMT problems, but i really don't like the way they look...at all