Hi,
copied & pasted the one that i wrote in one of the topics.
hi,
a std mazda gb comes with few ranges choices.
the b6t fwd gearbox offers u short ratios. if it's along ratio, then it's not a b6t gearbox...unless modded already. 3rd gear offers u 140kmh at rev cut and i'm using a 17" rims with 215/45 series tyres. the 5th gear at 3000rpm constant is 95kmh.
the tx3 1.8/bp na gearbox is quite short too. 3rd gear a little longer at rev cut. maybe frens here can confirm at what speed. i will ask my younger bro driving a bpt in a tx3 sampan. the 5th gear at 3000rpm is about 100kmh. some says the tx3 1.8/bp na gearbox is a competitive gearbox.
the B6 dohc injection gearbox sourced out from Mazda BF series is not really competitive, meant to be more economical. 3rd gear is 155kmh at rev cut and 5th gear at 3000rpm is 110kmh. I'm using this gb now as my B6T cracked.
Not too sure about Lantis 1.8 gearbox performance...some says that it's just the same as the BP n/a & tx3 1.8 gearbox.
its true that ratios in the turbo gearbox is much stronger but all depends on the driving attitude. I'm just driving a bpt but i cracked my 3rd gear ratio and after that cracked the casing. but i had a good sweet 4 years with the gearbox b4 changing to the B6 injection...no choice, B6T fwd gearbox is hard to find.
tkk is one of the gearbox ratio sifus around.