Countershaft Disassembly, Inspection, and Reassembly

K20A4 and K20A5 Engine Models

1.Inspect the thrust needle bearing and the needle bearing for galling and rough movement.


2.Inspect the splines for excessive wear and damage.

3.Check shaft bearing surface for scoring and excessive wear.

4.Lubricate all parts with ATF during assembly.

5.Install the conical spring washer, reverse selector, 31 x 50 x 18.5 mm collar, 3rd gear, 1st gear, and 2nd gear in the direction shown.

6.Countershaft locknut has left-had threads.

7.Replace the locknut and conical spring washer with new ones when assembling the transmission.

8.Some reverse selector hubs and 4th gear collars are press-fitted to the countershaft; special tools are needed to remove them and install them.