2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

Tranny gear ratios

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Old Sep 11, 2002 | 06:11 AM
  #1  
Project84's Avatar
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From: Kicking down doors in a neighborhood near you
Tranny gear ratios

The other day I read that a stock FC should redline at 160mph, but if you replace 5th gear with the 5th gear from a 3rd Gen tranny, you can redline at 180mph. Is 5th gear in a N/A tranny the same as in a TII tranny? I know the two aren't interchangeable because of the bell housing bolt patterns, but I don't know what else is different between the two.
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Old Sep 11, 2002 | 12:56 PM
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mazdaspeed7's Avatar
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From: Savannah, GA
Re: Tranny gear ratios

Originally posted by Project84
The other day I read that a stock FC should redline at 160mph, but if you replace 5th gear with the 5th gear from a 3rd Gen tranny, you can redline at 180mph. Is 5th gear in a N/A tranny the same as in a TII tranny? I know the two aren't interchangeable because of the bell housing bolt patterns, but I don't know what else is different between the two.
Someone fed you a line of ****. Thats about as far off as you can get. If you want to calculate the speeds, I have the formula. PM me if you want it.

5th gear in a n/a is .711, while the TII and GTUs model had .756. I odnt know what 5th ratio the 3rd gen has, but I believe its also .756..

The TII and n/a trannies have the same bell housing bolt pattern.....they bolt to the same motor. But the input shaft, flywheel/clutch diameter, gear ratios, etc are different.
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