Regearing a tranny - Toyota Tercel

[Big Dave]

The Corvette and Viper get away with the huge 0.5:1 overdrive because of their enormous low-end torque. The T-56 would be perfect for a diesel down to 3.0 liters or so.

[LostCause]

Nice use of the BSFC maps, Daox.

I would only be concerned about running extremely low gear ratios if you were required to increase low-end torque. I wouldn't be concerned due to the complexity of that task, but rather that you will be putting immense loads through the transmission when geared so low.

I have no idea how over-engineered Japanese transmissions tend to be, but stripped gears seem to be a real possibility...especially if they are of the self-manufactured variety.

- LostCause

[dremd]

I have no Idea on the Tercel transmission, but the W58 is 200% over engineered, the R-154 is 300% over engineered and the Getrag is about 250% over engineered IMHO
I know that the 5sfe Camry 5 speed will do 200 Whp no problems as well (don't know transmission code)

[Daox]

Yeah, the Tercel tranny is beefier than need be and I'm sure would hold up just fine. However, I won't be using a Tercel transmission in the car. It'll be swapped out for a Corolla trans to get the ratios I want along with a LSD since I am supercharging it. The Corolla trans is even beefier and proven to take over 300 hp.

[LostCause]

I think I'm in the minority when I believe a transmission being 300% stronger is a bad thing. I understand why they do it, but efficiency-wise, that thing is 3x over-engineered (aka, heavy).

Good luck, though.

- LostCause

[dremd]

Originally Posted by LostCause

I think I'm in the minority when I believe a transmission being 300% stronger is a bad thing. I understand why they do it, but efficiency-wise, that thing is 3x over-engineered (aka, heavy).

Good luck, though.

- LostCause

All depends on the application in my opinion. In an efficient daily driver, Yes absolutely However in something that's going to be relentlessly pounded, and hot roded, No.

[Daox]

There have been a few isolated incidents of guys doing drag racing with drag radials and eventually snapping differential parts. Going with the Corolla trans ensures me that this will not happen. I'd also agree with dremd's comment.

[steve-o]

Why not go with changing the final drive? I drive a 92 paseo with a MT and think that the whole transmission is a little short in the ratio domain....