Low Ratio Transmission

[Kippah]

Hi all,

Just a quick question for u all what do u run in the way of transmissions because i have hit the issue of my ratios being so high in my rally car. its a 2nz-fe (Cup car engine) on a yaris cup car ecu. The cup cars them selfs ran a trd crown wheel and pinon from what i under stand (discontinued) so what i need to know is their any bits i can use off other gearbox's to make myn a lower ratio? Like fitting a 1.0 gear set into a 1.5 box or something along them lines ?

many thanks in advance guys.