i was wondering is there a different between JDM and USDM gear ratio? if i'm not wrong, it has too. because the speedometer on the JDM read 180 km/h and USDM 180 mph.

 

Most "JDM" FDs ran the same 4.10 (manual) and 3.90 (auto) rear ends as the "USDM" FDs. High performance models in later years ran a 4.30 (manual only). The 5th gear in the tranny of the performance models is also slightly shorter than the "USDM" tranny.

 

What year did they start comming out w/ high performance models that has the 4.30 ?? thx

 

that would be 96+ rs, rz .

 

i thought that speedo was low in japan because their engines were electronically limited (this is just what a friend told me, so please no flaming if im wrong).

 

might want to double check your info bud. i got a 4.3 in my trans. 1994 r2 bathurst.

 

might want to double check what you really have...

 

oh snap!

 

^to clarify...the 4.3 is not in the tranny (not that he doesn't have a JDM FD)

 

i do have a jdm fd. and it is a 4.3 final drive. tell me what the rev is @ on a 4.3 final drive bud.

 

chill dude...all I said was, the 4.3 is in the differential, not the tranny as you stated...bud.

 

chill? i wasnt even gettin loud. the "bud" statement is what i use all the time. dont take it out of context bud.

 

*takes out the popcorn and waits to see more drama *

And slightly back on subject - so we (Manual USDM) have a 4.1 Final Drive, while some (performance models) have 4.3 as well as slightly shorter 5th. Am I with you all so far? If so, anyone know what the gearing are for said models; specifically 5th - i'm assuming that 1st - 4th are the same based on what has been said.

 

correct, JDM 5th's are .806 from a USDM .719...with 17" 99 wheels, 4.1 and a JDM tranny, this combo limits you to a top speed of 180mph.

seems fit given the range on the speedo

 

JDM spedo's are 180 Km/h.... not mph, I don't understand what you mean by fitting?
Yes, JDM cars are limited to 180km/h I have a JDM ecu.

 

Seems fit...for my car. MPH on the speedo...gears limited to 180mph. Not that I plan to travel that fast.

 

95 actually, in the RZ and Australian SP.

They were never used in the r2 or r2 bathurst - both of which are optioned down bargain specials (check the original pricing)

 

i was going to say other models to, but was lazy at the time.

 

im guessin they changed it out on mine then. ill test my car in fifth @ 100 kph and let you know what it revs @

 

O, I see, my mistake.