Final answer:
The TMC method requires the wheel bearing endplay to be within 0.001-0.005 inch, which is crucial for vehicle safety and bearing longevity.
Step-by-step explanation:
When using the TMC method of adjusting wheel bearings, the endplay must be within the range of 0.001-0.005 inch. This precise adjustment is critical for the proper functioning and longevity of wheel bearings. Endplay that is too tight can cause excessive friction and heat, leading to premature wear-out of the bearings. Conversely, too much endplay can lead to excessive movement and instability, which may cause the wheel to wobble or bearings to fail. Therefore, maintaining the optimal endplay range is essential for safe vehicle operation and to prevent unnecessary maintenance.