MT-32 MANUAL TRANSMISSION — Component Parts (Counter Gear and Reverse Idler Gear) 2. MEASURE CLEARANCE OF REVERSE IDLER GEAR AND SHIFT ARM SHOE Using a feeler gauge, measure the clearance between the reverse idler gear and shift arm shoe. Standard clearance: 0.20 — 0.41 mm (0.008 — 0.0161 in.) Maximum clearance: 0.9 mm (0.0354 in.)