I hav a buggered ty752vb4aa. Am i right in thinking that as long as i replace with one of the same ratios the code is irrelevant? Is it just the final drive 4,11 that i should be concerned with?

 

752's are the weakest bo of the lot, you're better off going for a 754 box and diff from a facelift classic or newage as they are stronger and the ratio's are taller (especially 5th)

 

Is there a lot of work involved in replacing with a newage diff? The gb is alreafy out

 

if i replace for a gb and diff from a uk wrx which has longer ratios how does that effect the car? will it be slower?

 

the diff is easy and tiny compared to a gearbox.

Based on your last post i'd just say change the gearbox. A gearbox wont make a car slower and a longer ratio box will give it a higher top speed as its a longer 5th gear.

Stick with replacing like for like if you've no idea about gearboxes tbh.

 

: ) that would explain good 0-60 times and also the ability to appear like im not moving when getting near 100mph when an m3 takes off!! lol

 

Got a very good box for sale here off an sti3 (short ratio) but with uk 5th gear. See my breaking thread for details (-;