I did various searches but couldn't find anything concrete. I'm wondering if there's any way to upgrade my '04 5AT sedan's TCU to an '05? My first G35 experience was with an '05 and one of the things I loved about it, but miss a lot with my '04, is the downshift rev matching. If this isn't possible then I suppose I'll make the best of things and improve what I've already got with a grounding kit.

Thanks!