DISASSEMBLING THE FINAL DRIVE PINION GEAR ASSEMBLY 1. Loosen: rear drive shaft coupling gear (final gear side) nut 1 1 NOTE: Secure the final drive pinion gear teeth in the vise with a clean rag. EBS00184 POSITIONING THE FINAL DRIVE PINION GEAR AND RING GEAR When the final drive pinion gear, wheel gear, final gear case and/or final driven pinion gear are replaced, be sure to adjust the positions of the final drive pinion gear, wheel gear and final driven pinion gear using the shim(s). EBS00185 ADJUSTING THE FINAL DRIVE PINION GEAR BACKLASH 1. Select: final drive pinion gear shim(s) 1 1 MMM M M MMM M M MMM M M MMM M M MMM M M MMM M MMM a.
To find the final drive pinion gear shim thick- ness “A”, use the following formula. c d Final drive pinion gear shim thickness a + ( c b ) – d b a a = 55 mm (2.2 in). b = a numeral (usually a decimal number) on the final drive pinion gear either added to or subtracted from “22.2”. c = a numeral (usually a decimal number) on the final drive pinion gear bearing housing either added to or subtracted from “67.8”. d = a numeral (usually a decimal number) on the final gear case either added to or sub- tracted from “100”. Example: 1) a = 55 2) If “–02” is stamped on the final drive pinion gear, b = 22.2 – 0.02 = 22.18 b 7 - 30 REAR CONSTANT VELOCITY JOINTS AND FINAL DRIVE GEAR DRIV DRIV