hi i recently lunched my original jdm v3 sti box code ty752 i got a replacement box of a great lad on here and its a ty754 from a 99 uk does anyone know if i need to swap rear diff also i read one of these chart jobbies and it appears i dont but if anyone can confirm this and not guess it it would be greatly appreciated

 

if you post the full gearbox code on here i will have a look for you, the ty754 will have a 3.9 front diff with 1.1:1 drop gears so you will need a 3.54 rear diff.

 

will do as soon as i get back to work cheers

 

also what effect would this have on gbox/diff if it wasnt swapped?