Yay! we did it! - Toyota Yaris Forums

03Z33 · 11-05-2006, 01:10 AM

Finished my final drive gear ration research... I'll probably start a new thread when I have all the parts and #'s handy.

The Scion Xa/Xb uses the same C50 trans as our Yaris NCP91. The older Echo had a C150 trans which uses a slightly different bolt pattern, but internals are also very similar (if not same). Some people have also fitted the C60 and C160 tranmissions from Levin AE111 and Matrix Xrs, which are 6-speed trannies.

The only difference between Scion and Yaris trans is the final drive. Xa/Xb has 4.315 stock and Yaris has 3.722 stock. This means that we should be able to purchase the Scion ring gear and pinion gears (~$450) and swap them into our trans. Alternatively we can swap complete trannies with a Scion owner who is looking for better MPG or lower revs during cruise. I posted on Scionlife to see if anyones interested in swapping.

Also, TRD competition transmission gear set changes the ratios, theres two to choose from

Part number : 33030-EP702

Gear / Ratio C150 5MT
1st 2.786:1
2nd 2.059:1
3rd 1.600:1
4th 1.273:1
5th 1.042:1

Part number : 33030-EP752
Gear / Ratio C150 5MT
1st 3.200:1
2nd 2.359:1
3rd 1.850:1
4th 1.458:1
5th 1.167:1

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11-05-2006, 01:10 AM	#20
03Z33 View User's Garage Drives: TCR10 Join Date: Jun 2006 Location: SoCal Posts: 1,132	Finished my final drive gear ration research... I'll probably start a new thread when I have all the parts and #'s handy. The Scion Xa/Xb uses the same C50 trans as our Yaris NCP91. The older Echo had a C150 trans which uses a slightly different bolt pattern, but internals are also very similar (if not same). Some people have also fitted the C60 and C160 tranmissions from Levin AE111 and Matrix Xrs, which are 6-speed trannies. The only difference between Scion and Yaris trans is the final drive. Xa/Xb has 4.315 stock and Yaris has 3.722 stock. This means that we should be able to purchase the Scion ring gear and pinion gears (~$450) and swap them into our trans. Alternatively we can swap complete trannies with a Scion owner who is looking for better MPG or lower revs during cruise. I posted on Scionlife to see if anyones interested in swapping. Also, TRD competition transmission gear set changes the ratios, theres two to choose from Part number : 33030-EP702 Gear / Ratio C150 5MT 1st 2.786:1 2nd 2.059:1 3rd 1.600:1 4th 1.273:1 5th 1.042:1 Part number : 33030-EP752 Gear / Ratio C150 5MT 1st 3.200:1 2nd 2.359:1 3rd 1.850:1 4th 1.458:1 5th 1.167:1