Tech A says that on most modern vehicles the joints are sealed and lubricated for life . so there may be no grease fittings present. Tech B says that you should add grease to the ball joint until all the old grease is pushed out past the rubber boot on the joint.Who is correct? Select one: a. Tech A b. Tech B c. Both A and B d. Neither A nor B

## Step 1<br />This problem is about understanding the maintenance of ball joints in modern vehicles. Tech A's statement is that in most modern vehicles, the joints are sealed and lubricated for life, which means there may be no grease fittings present. This statement is generally correct. Modern vehicles often use sealed ball joints that do not require additional lubrication.<br /><br />## Step 2<br />Tech B's statement is that you should add grease to the ball joint until all the old grease is pushed out past the rubber boot on the joint. This statement is not correct. For sealed ball joints, adding grease can cause damage to the rubber boot and lead to premature wear.<br /><br />## Step 3<br />Therefore, Tech A is correct in this context.