A/T Mainshaft 5th Gear Clearance Inspection

K20Z2 Engine Model Remove the mainshaft transmission housing bearing. Assemble 41 x 68 mm thrust washer (A), 4th/5th clutch (B), 4th gear collar (C), and transmission housing bearing (D) on the mainshaft (E). Do not install the O-rings during inspection. Install the idler gear (F) on the mainshaft by a press, then install the conical spring washer (G) and locknut (H). Tighten the locknut to 29 N·m (3.0 kgf·m, 22 lbf·ft). |

1. Measure the clearance between the mainshaft flange (A) and 41 x 68 mm thrust washer (B) with a feeler gauge (C), in at least three places. Use the average as the actual clearance.
   Standard: | 0.03−0.11 mm (0.001−0.004 in.)

1. If the clearance is out of standard, remove the 41 x 68 mm thrust washer and measure its thickness. Select and install a new thrust washer, then recheck. THRUST WASHER, 41 x 68 mm
   No. | Part Number | Thickness
   --- | --- | ---
   1 | 90414-PRP-000 | 6.35 mm (0.250 in.)
   2 | 90415-PRP-000 | 6.40 mm (0.252 in.)
   3 | 90416-PRP-000 | 6.45 mm (0.254 in.)
   4 | 90417-PRP-000 | 6.50 mm (0.256 in.)
   5 | 90418-PRP-000 | 6.55 mm (0.258 in.)
   6 | 90419-PRP-000 | 6.60 mm (0.260 in.)
After replacing the thrust washer, make sure the clearance is within standard. Disassemble the shaft and gears. Reinstall the bearing in the transmission housing. |