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?

[dutchboy]

Could you put the e153 5th gear in the ST's C52 tranny or would that cause problems with the synchro?

Would you need to make a custom synhro?

Would love to get the revs down for highway driving.

You may be able to tell that I don't know a lot, just what I want to do

Anybody know if you would need a custom synchro if you changed 5th gear?

Is the shaft the same size on c52 and e153?

What about .706 4th gear from the GT Auto transmission? Could this be used for 5th gear in a manual?

Any OEM toyota 5th gears that come under the .713 e153 5th, or .706 GT Auto 4th gear?

The e153 gear would drop the RPMs by 375, which is a good start, a 600 RPM drop would be ideal (engine gets loud after 2800 RPM).


The ST has so much potential for gas mileage, it's just hampered by the gearing (which I believe was designed for Japanese highways, with a 60MPH speed limit).

I am also interested in ride comfort, the engine gets so loud at highway speeds (sometimes I'll wear earplugs!) Would like to improve this factor as well. May be solved by going back to stock airbox w/ the lower resonator box reinstalled.