*Note that the use of an automatic ECU in a manual TSX will eliminate the function of the reverse-lockout solenoid, which is a part that keeps the shifter out of the reverse gate when you are moving forward. It is possible to move the shifter into the reverse gate while driving, so care should be taken when shifting into 5th or 6th gear. Heeltoe has tested this product in the HTSpecTSX and found no harm to come from moving the shifter into the reverse gate while driving, and it is not possible to accidentally engage reverse.
