Automotive and Theory > Drivetrain Theory

Toyota C-series 6-speed Swap Info

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BigMike:
My 6-speed conversion is finished and can be read about beginning at Reply #207 of this thread.


The 6-speed C6X transaxle is offered in the following two flavors:

1st2nd3rd4th5th6threvFinalApplicationC60   3.166   2.050   1.481   1.166   0.916   0.725   3.250   4.529   Matrix XRS and Vibe GTC603.1662.0501.4811.1660.9160.8153.2504.529Celica GT-S and Lotus Elise
As you can see the Celica and Elise both use a C60 version having a 12.5% lower 6th gear compared to the Matrix and Vibe's C60.

For reference, here are some other transaxles to compare with:

1st2nd3rd4th5th6threvFinalApplicationC52   3.166   1.904   1.310   0.969   0.815   3.250   3.722   93-97 Corolla with 7A-FEC523.1661.9041.3100.9690.8153.2504.312AW11C563.1661.9041.3921.0310.8153.2504.312Corolla AE89 Close Range 3-4C593.1661.9041.3100.9690.8153.2504.058Matrix 1ZZ-FEE513.2301.9131.2580.9180.7313.5834.285AW11 SuperchargedC1603.1662.0501.4811.1660.9160.7253.2504.529AE111 20-valve
Interesting, the Pontiac Vibe & Toyota Matrix 6-spds share the same gear ratios as the 20-valve AE111 6-speed.

Also, there are different Final Drive ratios to choose from as well. Final drive ratios between C5X series are only interchangeable with C16X series transaxles. Unfortunately a C5X final drive will not mate with the C60 gear set. The C60 final drive must be used.

The best setup would be to get the 20-valve 6-speed and choose which C5X final drive to run.
Available C5X final drives are 3.526, 3.722, 3.941, 4.058, 4.312, and 4.529. The 3.7 & 4.3 are domestically available, the rest are only JDM and/or European.

Below is an attached Excel spread sheet Tire Size vs. Engine RPM Speed calculator to play with. It is quite nice. :D

BigMike:
But of course acquiring a C160 is much more expensive and more difficult to get than the C60, which is available state-side. So on to the C60 then!

Here are some pictures:













Here is the C60 (the cleaner one) compared to a C56:










Look at how much larger the webbing on the C60 is:




Compared to the C56:




Top view of the C60 webbing:




Top view of the C56 webbing:




Here is how to identify a C60 from a C56 based on the 5th/6th gear housing.
Here is the C56:



And here is the C60

BigMike:
So what does all this mean? To get the C60 installed behind your 4A, all you have to do is swap the C60 internals into your C5X, swap 5th/6th housing, and modify the shift linkages (if using in a MR2 and wa-la! 6-speed to go!

Here is a C52 6-speed Hybrid for use in a MR2:



Here you can see the MR2 C52 bellhousing and center housing attached to a C60 5th/6th housing using C60 internal gear and final drive set:

Sirdeuce:
4.3 final is good. If needed, we can change that outside of the tranny with lower profile tires. 225 45 16? 7" wide rims.

BigMike:
That tire would be much larger than the stock tires. FYI 205x16x40 & 205x15x50 are close in size to the 185x14x60.

Tire SizeCircumference    % Change    MPH, 6th gear, 3.5k RPM185x60x14    71.44"72.1205x50x1572.48"+1.38%73.2205x40x1670.55"-1.26%71.2225x45x1675.31"+5.13%76.0

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