I currently have an E-20 corolla with the 4K engine mated to a Toyota k40 4spd transmission. My question is: Can I pull out the K40 and get a 5spd K50?
Pros: Addition of a 5th gear so a little less fuel consumption
Cons: Smaller gear ratios
Now you guys tell me can this be done? And if so will I have to change my diff gears?