A. year wheel drive vehicle has a loud clunk when the transmission is placed peacused by loose universal joints Technician B says this is caused by an and a vibration that increases with vehicle speed. Technician A says caused balanced driveshaft.Who is correct? A. Technician A B. Technician B C. Both A and B D. Neither A or B

## Step 1<br />This problem is related to the diagnosis of a vehicle's drivetrain, specifically the driveshaft and universal joints. The driveshaft is a component that transmits power from the engine to the wheels, and the universal joints allow the driveshaft to flex as the vehicle moves.<br /><br />## Step 2<br />Technician A suggests that the issue could be due to an unbalanced driveshaft. An unbalanced driveshaft can cause vibrations and noise, especially at higher speeds. This is because an unbalanced driveshaft can cause uneven forces to be applied to the vehicle's body, leading to vibrations and noise.<br /><br />## Step 3<br />Technician B, on the other hand, suggests that the issue could be due to loose universal joints. Loose universal joints can also cause vibrations and noise, as they allow the driveshaft to move more than it should, leading to uneven power transmission and vibrations.<br /><br />## Step 4<br />Given that both Technician A and Technician B provide plausible explanations for the issue, the correct answer is C, Both A and B.