Six Speed in a 6GC Options

[Fastbird]

I've heard talk of people thinking about it but have never seen any factual attempts. These things need a sixth gear.

I was pondering, and it probably wouldn't be toooooooo terribly difficult to have a bell housing adapter made for something like a 7th gen and then have a custom input shaft in a longer length made.

Are there any other ideas floating around out there?

[Kadett]

Does anyone have the gear ratios and final drive ratios of the 5S-FE 5 Speed and the E153 transmissions handy for comparison??

here you go,

s54: 3.285, 1.960, 1.322, 1.028, 0.820 / FD: 3.944, 4.176
e153: 3.230, 1.913, 1.258, 0.918, 0.731 / FD: 3.933, 4.285

the final drive ratio differed based on application, the bold are 6gc (i think) and mr2 sw20 turbo.

US spec GT have the 4.176 Final Drive
EU/JDM spec GT (3S-GE) have the 3.944 Final Drive.

The 7th gen gearbox is really weak and cant sustain to much horsepower. Going to 250 bhp is already pushing it. Getting a LSD + Radials with 250 bhp = bye bye tranny.

With my car I drive 75 mph @ 3200-3300 rpm.
On the 7th gen it would be 2800 rpm. Friend of mine got one.

For gas consumption it would be benifitial but in terms of power you would be better of with the GT or MR2T tranny. Best option would be the GT4 gearbox converted to 2WD but I only know of 2-3 cases that have succesfully done this.

Theorotical top speed of my car with a 225/40/18 tyre would be 160-163 mph. I speed that I will never reach or want to reach with my Celica because its not meant for it (2wd plateau, different weight balance etc etc)