What’s the gear ratio difference from a 2018 RS1 transmission to a 2016 XPT 2seater transmission?
16 2/4 & 17 XPT4 are geared the same. The 17+ XPT2 and 18+ XPT4 have a higher low gears.17+ 2 seat turbo transmission is identical to a rs1. 16 2 seat turbo and 16-20 4 seat turbo are both factory gear deducted compared to a 17+ 2 seat turbo or a rs1 by around 12% in all gears. All turbos and rs1 used a gear to hear reverse and a flanged output for the drive shaft as well. All will physically interchange and bolt in.