here we will have tips to help toyota racers.

Checking Toyota Rearend Ratios for Toyotas is simple.
here are the firewall codes with the pinion nut color and
the corresponding gear ratio.
8 BOLT/s29(no color)410/s37 green 3.58/s30 orange 3.73/s31 red 3.90/s41 pink 3.30/
10 BOLT/t29(no color) 4.10/t38 lavender 3.41/t30 red 3.72/t41 orange 3.30/t28 blue 4.30/t31 yellow 3.90/t37 pink 358