A/T Mainshaft 5th Gear Clearance Inspection

K20Z2 Engine Model

1. Remove the mainshaft transmission housing bearing.

1. 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.

1. Install the idler gear (F) on the mainshaft by a press, then install the conical spring washer (G) and locknut (H).

1. 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.

1. 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.)

1. After replacing the thrust washer, make sure the clearance is within standard.

1. Disassemble the shaft and gears.

1. Reinstall the bearing in the transmission housing.