250 350 375 400 TURBO HYDRAMATIC 1968 PASSENGER SPEEDOMETER GEAR CHART NOTE To order Speedometer Gears or Parts Transmission Type Rear Axle Ratio and Tire Size must be known REAR 4 343 4 337 AXLE TIRE SIZE GEAR GEAR RATIO SPEEDO SPEEDO DRIVE DRIVEN TURBO HYDRAMATIC TRANSMISSION 2 29 8 45 X 15 9780628 2 29 8 25 x 14 8 55 x 14 8 15X15 G7OX15 1359270 2 56 8 55 X 14 8 15 x 15 8 45 X 15 G7O X 15 8623313 9774413 2 56 8 25 x 14 8623313 9780628 2 73 8 45 x 15 8623313 1359270 2 73 8 25 x 14 8 55 x 14 8 15 x 15 F70 x 15 G7O X 15 8623313 1359271 3 07 8 55 X 14 8 15 X 15 8 45x15 G70x15 8623313 1362195 3 07 8 25 x 14 8623313 1362049 3 08 8 55 X 14 8 15 x 15 8 45X15 G7OX15 8623313 1362195 3 08 8 25 x 14 F7O x 15 8623313 1362049 3 31 8 45 X 15 8623313 1362196 3 31 8 25 X 14 8 55 X 14 8 15x15 G70x15 8623313 9775187 3 36 8 45 x 15 8623313 1362196 3 36 8 25 X 14 8 55 X 14 8 15x15 G70x15 8623313 9775187 GM PARTS DIVISION GENERAL MOTORS CORPORATION CHEVROLET 11 REV 4 81 4 23 c 4 000 GROUP