WARNING: This page is about a different car, the 2003 Nissan Altima. However, it is still accessible from the selected car via links, so may be relevant.
Check for deformation or damage.
Measure thickness of dish plate.
Thickness of dish plate : 3.08 mm (0.1213 in)
If deformed or fatigued, replace.
Fig 1: Identifying Thickness Of Reverse Clutch Dish Plates