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Old 10-24-2012, 03:54 PM   #1
Jason@SportsCar
 
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Originally Posted by BEEF View Post

Jason (or anyone),

the final drive on the xB that you speak of is basically 4.3:1, what is the stock yaris one? I just wonder how gonzo it will be. I actually like that idea. I am gettin roughly 40-41 mpg right now and I could stand to lose a few. I would be alright still getting 35 or so.
Stock is 3.722, xB is 4.312.

At 65mph in 5th gear (with a 23" tire):
stock 2900rpm
xB 3350rpm

If you look at "rated" fuel economy numbers a 2007 Yaris is rated 29 city/35 hwy, the xB is listed at 27/32. I would expect part of the hwy loss on the xB due to it being a toaster on wheels, with that in mind I would guess that this change is about a 2mpg loss in a Yaris - but worth it for the acceleration.
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Old 10-24-2012, 03:57 PM   #2
suckerface
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Quote:
Originally Posted by Jason@SportsCar View Post
Stock is 3.722, xB is 4.312.

At 65mph in 5th gear (with a 23" tire):
stock 2900rpm
xB 3350rpm

If you look at "rated" fuel economy numbers a 2007 Yaris is rated 29 city/35 hwy, the xB is listed at 27/32. I would expect part of the hwy loss on the xB due to it being a toaster on wheels, with that in mind I would guess that this change is about a 2mpg loss in a Yaris - but worth it for the acceleration.
I think that statement just pushed me over the edge to track down an xB transmission for next summer. Thanks Jason, I hate you sometimes
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Old 10-24-2012, 04:06 PM   #3
Jason@SportsCar
 
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Originally Posted by suckerface View Post
I think that statement just pushed me over the edge to track down an xB transmission for next summer. Thanks Jason, I hate you sometimes
The trans is not a bolt-in, you can only use the gears, the case is different. For what you would spend on a used (unknown condition) trans you can buy the parts you actually need new - also keep in mind if you buy a used trans you may have labor $$$ in pulling it apart.
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Old 10-24-2012, 04:06 PM   #4
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Thanks Jason, I hate you sometimes
I agree with this fully....

so jason, how much do you pay a shop to do the work with the trans out? I wonder what the full price of this would be? (parts and labor together). I may have to start tracking down an old xB trans.
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Old 10-24-2012, 04:17 PM   #5
Jason@SportsCar
 
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I agree with this fully....

so jason, how much do you pay a shop to do the work with the trans out? I wonder what the full price of this would be? (parts and labor together). I may have to start tracking down an old xB trans.
Stated in post 12, $400 for the gear swap if I take them the trans and new gears.

If you plan on driving your car into a shop and dropping off the parts, I would expect you are paying for at least four extra hours of labor. $300-400.

But how can you guys go this far without also doing the LSD and Flywheel while you are in there?
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