Hi i have a problem in my classic
I change few time ago my gearbox and rear differential
I have a uk2000 99 and i fit a wrx02 gearbox and diff
Since i fit the speed show more than real..
Anybody can help me??? The tyres are the correct size.. 215/40/17
Thanks

 

205/50/16 are correct size for classic and newage are not 40 profile iirc
I run newage wheels on my classic and speed also shows more than I'm doing

 

Newage wrx i thinks it's 215/45/17

 

A lower profile tyre will make a difference to the speedo: there is a calculator Over in the wheels&tyres section which will show the difference,like I said tho,you have a classic so gong from 16's to 17's will make the speedo out.

 

But the problem is i'm running with 17 before change the gearbox and the speedo show the correct speed
Thanks

 

Going From a 205/50/16(Standard classic) to 215/40/17 there is only 1% difference
Going from 215/45/17(standard size newage) to 215/40/17 there is a 4% difference.

 

How far out is the speedo?

 

10-15 km/h

 

my original gearbox was TY754VN1AB impreza my99 and then i fit a ty754VN2AA