Why does your 1990 Toyota Celica GTS shake and rumble when you shift gears?
The reason for the engine to shake and rattle when changing
gears could be one of three things. 1. you just don't know how to
drive and need to be more smooth when changing gears. 2. Your
clutch may not be fully released thus you are just a bad driver. 3.
your tranny is shot and a new one is recommended.