A/T Mainshaft 5th Gear Clearance Inspection

1.Remove the mainshaft transmission housing bearing.

2.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.


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

4.Tighten the locknut to 29 N·m (3.0 kgf·m, 22 lbf·ft).

5.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.) 



6.If the clearance is out of standard, remove the 41 x 68 mm thrust washer and measure its thickness.


7.Select and install a new thrust washer, then recheck.

THRUST WASHER, 41 x 68 mm
No. Part Number Thickness 
90414-PRP-000 6.35 mm (0.250 in.) 
90415-PRP-000 6.40 mm (0.252 in.) 
90416-PRP-000 6.45 mm (0.254 in.) 
90417-PRP-000 6.50 mm (0.256 in.) 
90418-PRP-000 6.55 mm (0.258 in.) 
90419-PRP-000 6.60 mm (0.260 in.) 

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

9.Disassemble the shaft and gears.

10.Reinstall the bearing in the transmission housing.