just got my k24a2 street tuned but after the tune my car wont go in reverse unless the car is off. i have a rsx type s trans 03. any idea what could be wrong. pls reply.

Hi all :-) Does anyone know if it is possible to use the second tsx 1.88 gear in the EDM EP3 (NPQ3) tranny ? i've searched a little and it looks like I need to change it together with the 1st gear (3.266), but it's only a theory and I need to be sure. Are these part no. correct ? 23210-RM3-000...