The Getrag 420G manual is generally robust but susceptible to 2nd and 3rd gear synchro wear, manifesting as cold-shift difficulty; regular factory-interval fluid changes help prevent it.
Getrag 420G transmission synchro wear
BMW E39 M5 · drivetrain
The Getrag 420G manual is generally robust but susceptible to 2nd and 3rd gear synchro wear, manifesting as cold-shift difficulty; regular factory-interval fluid changes help prevent it.