[HotLavaMann]

Has anyone heard definitively that the rear diff is the same one as a Lexus IS250? I'm very interested in going from the 4.10 to the 3.727 gearing but don't want to waste money on a special order part that I probably would have a hard time returning if it isn't the correct one.

I'm trying to get lower RPM in 6th for highway cruising. Sure, I could just replace the gearing on 6th but that seems very expensive route to go. I don't think I'll mind making the other gears a bit taller.

Anyone know for sure one way or another? Other option is to try to order the JDM part from Japan as the GT86 has the 3.727 is an option.

Also : anyone know how if it's easy to adjust speedo for different ratio? Hopefully just a firmware setting?

Thanks