Thanks a bunch jondee86. Next question..i assume that the speedometer reading is taken from the output shaft of the t50..i think...so with a 3.9 axle..will the reading be lower than the actual speed ? Also lets say i swap gears with a member here..my 4.3 for a 3.9..will the other lsd internals fit r...

There are no direct fit "drop-in" gearboxes for the AE86. There are gearboxes that can be adapted with some modifications. However, the T-Series Toyota differential had a number of different ratios, all of which require only the change of the crownwheel and pinion within the differential ...

Thats true..and i do know that..what i meant was do you have links to where i can buy those. Also what options do i have for different gearboxes.are they a direct fit ?
If i were to get a 4.1 or 3.9gear
.do i re use the same axle housing ?
I would like more detailed information. That would help a lot.

Hi there, I am Gen X er who is almost 40, and only recently have managed to sort myself out career wise and financially. I hail from Malaysia. All this while, since 1997 when i got my lisence i drove a 1991 Proton saga , a FWD malaysian made family sedan, which is a copy of a 1980s mitsubishi lancer...