Regearing transmission 5th gear?

[spookybathtub]

Looks like the 6 speed has a larger final drive, which combined with the smaller 6th makes a larger ratio than the 5 speed in 5th. So what about taking a C160 and using the final drive gear from the C50? That should achieve much lower RPMs on the highway, but maybe not enough torque in 1st.

On the other hand, Toyota's stock gearing is designed to pair with the stock aerodynamics. With reduced drag, maybe it makes sense to just swap the 5th gear for a .725.

[CrankyOldMan]

Originally Posted by spookybathtub

So what about taking a C160 and using the final drive gear from the C50?

I think the two gearboxes are mechanically incompatible, specifically the differential. The C50 uses an 8-bolt ring gear, the C160 uses a 6-bolt. BlueVitz can confirm since he's done the swap. You would also have to find a pinion shaft for the 6-speed that came with the 3.722 final drive, and I don't think that exists.

[IllusionX]

Originally Posted by CrankyOldMan

I think the two gearboxes are mechanically incompatible, specifically the differential. The C50 uses an 8-bolt ring gear, the C160 uses a 6-bolt. BlueVitz can confirm since he's done the swap. You would also have to find a pinion shaft for the 6-speed that came with the 3.722 final drive, and I don't think that exists.

You have to Frankenstein the 2 gearbox together to make a 6spd. It won't fit bolt on for sure.
And the Yaris uses the c150

[RagnaCaT]

Originally Posted by IllusionX

You have to Frankenstein the 2 gearbox together to make a 6spd. It won't fit bolt on for sure.
And the Yaris uses the c150

IllusionX you've been around long enough to know that the Yaris USES a C50... And Cranky is almost a master on this subject.
And talking about Frankenstein my trans gets installed today with 1st 3.166 2nd 1.904 3rd 1.310 4th 1.031 5th .815 and a 3.94 final with helical LSD special thanks to Cranky for info and help...



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[CrankyOldMan]

Originally Posted by RagnaCaT

IllusionX you've been around long enough to know that the Yaris USES a C50... And Cranky is almost a master on this subject.
And talking about Frankenstein my trans gets installed today with 1st 3.166 2nd 1.904 3rd 1.310 4th 1.031 5th .815 and a 3.94 final with helical LSD special thanks to Cranky for info and help...

Keep us posted on how it goes this time!