m40 gearbox or 318is box?

[mc_hawkings24]

Hi

Ive recently converted to a 16v and i was wondering if swapping to an IS gearbox would be beneficial

taller gearing?

i think i have a 4.10 diff and i think the IS has the same

thanks

[daimlerman]

All the facelift 4 cylinder cars share the same gearbox...
Getrang 240.

[mc_hawkings24]

apparently the 16v box has overdrive so was wondering whether it would be better
also the flanges are different and the props shorter but thicker but whether the diffs a different i dont know? there both 4.10 though. There has to be a difference somewhere otherwise why not just use your standard m40 box.

[daimlerman]

All the facelift 4 cylinder cars share the same gearbox...
Getrang 240.

320i also uses Getrang 240,but with a differently shaped bellhousing!

[Tommek]

http://www.e30zone.net/modules.php?name ... c&t=159615 read this ... AFAIK there is something about this disscused there