can any one tell me if a 4.444 rear diff is uk or jap it came off a uk 97 wrx

 

unless its an Auto, then only the P1 and the JDM sti's have this set-up...................

alyn

 

STI MY99-00 is 4.444

UK Turbo MY99-00 is 3.9 (3.545 rear diff)
which is which the lad reckons he wants a r160 4.444 is the 4.444 a uk diff or jap?

 

I need 4.444 rear diff for my STI5 JDM gearbox

 

WRX is JDM! not UK car

 

this was an awd scooby not wrx so is ratio 4.444 for awd turbo my97-00

 

UK cars are generally 3.9 front, 1.1:1 transfer box and 3.545 rear diff.
Generally, JDM/Australian cars are either 4.44 or 4.11 front and rear diffs with a 1.0:1 transfer box.
STi 5/6 is 4.44. The Classic WRX can be 4.11 or 4.44 depending on model or year.

 

harvey, how I can know if rear diff is 4.444?.

Cheers

 

Take the diff cover plate off and count the teeth on the crown wheel and pinion.
It will help if you mark a tooth on each with either yellow engineers chalk or use some typex.
4.44 = 40 teeth on the crown wheel and 9 on the pinion.
4.11 = 37:9
3.9 = 39:10
3.545=39:11

 

thank you harvey

it has been very easy

http://img112.echo.cx/img112/2712/10120434au.jpg

http://img112.echo.cx/img112/6042/resized10120312nx.jpg

http://img112.echo.cx/img112/443/resized10120320vw.jpg