I have a c30 t5 aut (aw-5551) and I’m planing to swap it to a m66.

What should I do with the ecu and tcm. Do I get a flash or something or swap them for a Manuel ecu and tcm?

@T5-T6-Schnappi
I see codes that says incorrect gearratio I every gear

I have not solved it yet. But I have also changed the gearbox and the codes are still there.

Do somone know where to reset the TCM and update the TCM

I used the dipstick for new oil

I have a problem with my c30.

It says incorrect gear ratio

I have changed the atf, valvebody, gearbox and the tcm

I still get the faults and only drive en limp mode and hard shifts