Asked in Subaru Impreza
Subaru Impreza

Will you need a new tranny if you swap your 02 wrx engine for an 03-06?

Answer

Wiki User
10/07/2008

Not for fitment issues but the WRX tranny is considerably weaker than the STi tranny and the extra power from the STi engine stands a good chance of causing a failure in the WRX tranny (especially the weak 2nd gear).