Reverse Idler Shaft and Gears

WARNING: This page is about a different car, the 2004 Nissan Sentra. However, it is still accessible from the selected car via links, so may be relevant.

Check the parts listed. If necessary, replace them with new ones.

Damage, peeling, dent, uneven wear, bending, and other non-standard conditions of the reverse idler shaft.
Excessive wear, damage, peeling, and other non-standard conditions of the reverse idler gears.

Fig 1: Checking Reverse Idler Shaft And Gears
Courtesy of NISSAN MOTOR CO., U.S.A.