what exactly is the function of the manual button an the auto trans?

is it really worth it to pull the trac fuse?

the manual button allows you to lock up gears and reduce shift times by 30%.

pulling the trac fuse disables the sub throttle while shifting and allows for very quick shifting but is tough on the trans. pulling the fuse also disables the governer so you can go over 160mph. my advice, leave it in unless you are at the track.

thanks that's first intellegent responce I've got after posting this on several boards!

I did not know that pulling the fuse disables the subthrottle, but since it seems to, I agree to leave it in. The ends do not justify the means in that case unless you really need to go 155+ mph. I do have a tip on shifting faster while in manual mode:

Experamint Shifting whithout lifting off the gas so you can get a feel for how long it takes for the tranny to shift after you have actually moved the shifter, as there is quite a bit of lag. After you get used to the lag time, start experaminting with letting off the gas when the tranny is actually shifting. Here is what produces the quickest/smoothest shifts for me under medium-hard acceleration:

1) Shift into desired gear whith foot still on the gas.
2) A split second after shifting let off the gas to about 1/3 or 1/4 throttle (NOT ALL THE WAY OFF!) for the tranny to shift. This allows for the lag of the shifts from the automatic tranny, while not totaly disengaging the drivetrain, which causes a slight jerk when re-applying the gas.
3) Then re-apply the gas and try to match the rpm's.
4)It took me a little while to get my timing down perfect so the shifts were smooth and fast.

I know its annoying, the automatic in the supra is harder to shift in manual mode than a real manual. On the other hand, if you can not shift a real manual very well, this will help your timing alot. I was not great at driving a manual, but after i got good at shifting my auto in manual mode, it is many times easier to drive a real manual.

quote:

Originally posted by BMW Eater:
1) Shift into desired gear whith foot still on the gas.
2) A split second after shifting let off the gas to about 1/3 or 1/4 throttle (NOT ALL THE WAY OFF!) for the tranny to shift. This allows for the lag of the shifts from the automatic tranny, while not totaly disengaging the drivetrain, which causes a slight jerk when re-applying the gas.
3) Then re-apply the gas and try to match the rpm's.
4)It took me a little while to get my timing down perfect so the shifts were smooth and fast

i have tried a method similar to what you describe however when i let off the throttle to about 25% it seemed like the lag time increased and the gear wouldnt fully engauge untill i got back on the throttle hard. maybe i just need practice. i have found however that you CANNOT out shift the computer. it is consistantly quicker when left in D.

agreed
you can never shift faster then your computer =)

It will seem like the lag time increases a little because the engine still has some gas when it is shifting. With all automatic transmissions that makes the shift take a little longer. However, since you are not letting off the gas at the same time that you shift it ends up equaling out.

I am not so shure about not being able to outshift the computer. Especialy if you tranny has some miles on it and isnt as keen as it used to be. Also i like manual mode alot better for enthusuastic driving since it locks up the torque converter so much better. It is all preference but I am pretty confident that it pulls harder in manual mode.

oh yea, has anyone noticed that if you step on the gas really hard and quickly while in 'drive"
it will get up really close to redline and still not shift? I have done it two times and had to back off the gas because it was gettin to redline and the tranny was not shifting.