What is a 42RH Transmission?

2.94s, but if I think I'm headed for 3.23. With the overdrive you could run 3.91s on the street and still cruise at 75 at 2400. I think Trailbeast is running 3.55s in his with that trans. When figuring it out don't forget the lower first and second gears compared to a 904.

here is the gear spread:
Trans 1st 2nd 3rd 4th
A904 2.45 1.45 1.00
RH42 2.74 1.54 1.00 0.67