recently had a new gearbox fitted from a 2006 wrx into my classic
since then the engine light comes on but goes straight back off again when the revs drop below 1000 sometimes it cuts out any ideas anybody before i check codes ....plus is it safe to check or reset after a remap and wont put it back to factory settings cheers for any advice in advance

 

Not sure about the gearbox issue but you can reset your ecu without losing your remap