Is it possible to install 7 speed auto transmission In Corolla Altis 1.6 x 2021 which is having 4 speed auto.. Corolla 1.6 x 2021 model have very bad fuel economy because of 4 speed auto..
It's better that you update onto same year grande as it will cost you above 600k.
There is no such thing as a Toyota 7 speed automatic. The 2021+ 1.6 corolla and 1.8 variants use a CVT with 7 simulated gears.
Better to sell your car and upgrade to the CVT variant either a 1.8 Cruisetronic or Grande.
Else update to the new 1.6 CVT.
