ALLISON AUTOMATIC TRANSMISSION POWERMATIC P I AND AT540 1971 72 TRUCK SPEEDOMETER GEAR CHART CONT A 4 337 4 34 3 4 329 4 330 REAR GEAR GEAR ADAPTER KEY 7 AXLE REAR TIRE SIZE SPEEDO SPEEIDO SPEEDO SPEEDO RATIO DRIVEN DRIVE ADAPTER P T ALLISON POWERMATIC P T TRANSMISSION r 4 86 7 50 x 20 7 50 x 20 If 0 R 3756924 6769718 6451929 867209 4 86 8 25 x 20 3756922 6769718 6451929 867209 4 86 8 25 x 20 0 R 3756920 6769718 6451928 867209 4 86 9 00 x 20 10 00 x 20 9 00 x 20 O R 3756920 6769718 6451929 867209 5 57 7 50 x 20 3756926 6769718 6451928 867209 5 57 8 25 x 20 3756924 6769718 6451930 867209 5 57 7 50 x 20 0 R 3756924 6769718 1565452 867209 5 57 8 25 x 20 0 R 3756926 6769718 6451930 867209 5 57 9 00 x 20 9 00 x 20 0 R 3756926 6769718 6451929 867209 5 57 10 00 x 20 3756924 6769718 6451929 867209 5 83 7 00 x 20 3756926 6769718 1565452 867209 A 5 83 7 50 x 20 3756920 6769718 1584274 867209 5 83 8 25 x 20 3756926 6769718 6451930 867209 5 83 7 50 x 20 O R 3756920 6769718 5 83 8 25 x 20 O R 3756922 6769718 1584278 867209 5 83 9 00 x 20 3756922 6769718 1565452 867209 5 83 9 00 x 20 0 R 3756920 6769718 1584278 867209 g 5 83 10 00 x 20 3756926 6769718 6451929 867209 5 83 11 00 x 20 3756922 6769718 6451930 867209 6 14 7 00 x 20 8 25 x 20 0 R 7 50 x 20 7 50 x 20 0 R 3756920 6769718 6 14 8 25 x 20 9 00 x 20 O R 3756920 6769718 1584274 867209 6 14 9 00 x 20 3756924 6769718 1565452 867209 A 6 14 10 00 x 20 3756920 6769718 1584278 867209 6 14 11 00 x 20 3756924 6769718 6451930 867209 6 17 7 00 x 20 8 25 x 20 0 R 7 50 x 20 7 50 x 20 0 R 3756920 6769718 6 17 8 25 x 20 9 007 x 20 0 R 3756920 6769718 1584274 867209 6 17 9 00 x 20 3756924 6769718 1565452 867209 6 17 10 00 x 20 3756920 6769718 1584278 867209 I 6 17 11 00 x 20 3756924 6769718 6451930 867209 6 40 7 00 x 20 7 50 x 20 7 50 x 20 0 R 3756922 67697 18 6 40 8 25 x 20 8 25 x 20 O R 9 00 x 20 0 R 3756920 67697 18 6 40 9 00x 20 3756926 6769718 1565452 867209 6 50 7 00 x 20 8 25 x 20 0 R 7 50 x 20 7 50 x 20 O R 3756922 6769718 6 50 8 25 x 20 9 00 x 20 0 R 3756920 6769718 6 50 9 00 x 20 10 0 x 20 0 R 3756926 6769718 1565452 867209 6 50 10 00 x 20 3756920 6769718 1584274 867209 6 50 11 00 x 20 3756926 6769718 6451930 867209 6 67 8 25 x 20 3756926 6769718 1584278 867209 6 67 8 25 x 20 0 R 3756922 6769718 6 67 9 00 x 20 9 00 x 20 0 R 10 0 x 20 0 R 3756920 6769718 6 67 10 00 x 20 3756926 6769718 1565452 867209 6 67 11 00 x 20 3756922 6769718 1584278 867209 7 17 7 00 x 20 8 25 x 20 0 R 7 50 x 20 7 50 x 20 O R 3756926 6769718 7 17 8 25 x 20 9 00 x 20 0 R 3756924 6 769718 7 17 9 00 x 20 10 0 x 20 0 R 3756922 6769718 7 7 GM PARTS DIVISION GENERAL MOTORS CORPORATION CHEVR0LET 72TM7 7 REV 5 79 4 155 4 343 4 343 777 7 7 1 7 7 7 777 7 7 7 7 777 77 7 77 7 77 7