CORVAIR 95 AND GRl The differential carrier assemblies used on Corvair 1200 Series vehicles are identical to those used on Corvair Passenger Cars with the exception of gear ratios Because of the heavier vehicle and greater load carrying potential the standard ratio is 3 89 1 with three speed and Powerglide transmissions When the four speed transmission option is elected a rear axle ratio of 3 27 1 is used Reduced rear axle ratio is possible with a four speed transmission as the transmission gear ratios are increased to provide EENBRIER 1Z00 SERIES torque multiplication in the three reduction gears This same ratio can be obtained optionally with three speed in combination with a three speed or Powerglide transmission Rear axle bearings used in 1200 Series vehicles are of the tapered roller type for increased durability Two tapered roller bearings are mounted back to back and caged within a sheet metal retainer however this difference in design does not affect service procedures relative to the axle shafts or bearings cmou uw u uum