Difference between USDM ITR tranny and JDM ITR tranny?
07-15-2002, 04:47 AM
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Difference between USDM ITR tranny and JDM ITR tranny?
I was wondering if there was any difference between the USDM ITR transmission and JDM ITR transmission? I bought mynew ITR tranny last week and installed it, and the guy I bought it from said that since its the JDM version, it comes with a different final drive gear, is this true? Im just wondering, plus I have never driven a type R before, so I wouldnt be able to tell any difference.... also, is there any special type of tranny fluid I should use since I now have LSD?
07-15-2002, 12:44 PM
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Originally posted by qtiger
JDM ITR transmissions have a MUCH higher final drive than USDM.
It does also have lower ratio 4th and 5th so that you aren't at 6K RPMs on the freeway.
JDM ITR transmissions have a MUCH higher final drive than USDM.
It does also have lower ratio 4th and 5th so that you aren't at 6K RPMs on the freeway.
JDM tranny................USDM tranny
S80............................Y21 Y80 S80 S4C
3.23............................3.23.............. ........1st
2.105..........................2.105.............. ......2nd
1.458..........................1.458.............. ......3rd
1.034..........................1.107.............. ......4th
0.787..........................0.848.............. ......5h
3.................................3............... ............Reverse
4.785..........................4.4................ ........Final
Last edited by 98EX; 07-15-2002 at 12:46 PM.
07-15-2002, 12:52 PM
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Higher = shorter gears
Lower = taller gears
And, btw, that information is wrong, only the USDM S80 LSD (Type R trans) has those gear ratios. The Y80 and nonLSD S80 both have 4th and 5th ratios matching the JDM Spec R transmission.
Lower = taller gears
And, btw, that information is wrong, only the USDM S80 LSD (Type R trans) has those gear ratios. The Y80 and nonLSD S80 both have 4th and 5th ratios matching the JDM Spec R transmission.
Last edited by qtiger; 07-15-2002 at 12:55 PM.
07-15-2002, 12:59 PM
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Nope those numbers are right, I referenced them against a program I have that can calculte true speeds based on tire size, and gear ratios, and against http://www.bseries.net/html/specs/btrannyspecs.php
Also this site has the same gear ratios
http://www.allmotorhonda.com/techpag...anny_specs.htm
The ratios are the same as I posted up.
Also this site has the same gear ratios
http://www.allmotorhonda.com/techpag...anny_specs.htm
The ratios are the same as I posted up.