E46 318i (N42) 5MT to 6MT?
I am planning to swap a 6 speed gearbox into my 318i N42 engine which is on a 5 speed manual gearbox now.
The main reason i wanted to get a 6 speed because of high RPM when cruising. example 140kmh@4000rpm, 200km@6000rpm (redline)
It seem like overload/stress out my engine for a long distance travel with 140kmh cruising =(
Now i m running on stock diff (3.38). Although getting a lower ratio will solve the high rpm problem, but i will lost the lower end power.
What are the option of 6 MT that i have? i was thinking to get a 6MT from E90 320 (N46 Engine). But not sure will it fit into my N42 or not. It seems like nobody had done this on n42 before..