What is the reason for not being able to shift into R gear?

[VanSadie]

This problem can occur due to two main reasons: improper operation or excessive wear of the shift lever ball socket. Below is a detailed explanation of the causes: Improper shifting operation: Downshifting requires deceleration first. Before shifting, the clutch pedal must be fully depressed. The shift lever should be operated gently, quickly, smoothly, and accurately. The clutch must be pressed all the way down, and gear engagement should be done in one smooth motion. Excessive wear of the shift lever ball socket: Excessive wear of the shift lever ball socket can prevent the lower end of the shift lever from pushing the sliding gear into position when engaging first gear or reverse gear. This causes the shift lever to slip out above the guide block groove of the first/reverse gear shift fork shaft, preventing the shift fork shaft from reaching the correct position for gear engagement. It is recommended to visit a repair facility to replace the shift lever.