Final answer:
The best recommendation for a light DIY customer with transmission issues is to check the transmission fluid level and condition, inspect for leaks, and schedule a diagnostic test with a certified mechanic.
Step-by-step explanation:
The best recommendation for a light DIY customer with transmission issues is to check the transmission fluid level and condition. Low or dirty transmission fluid can cause transmission problems, so it's important to ensure the fluid is at the right level and clean. The customer can refer to their vehicle's owner's manual for instructions on how to check and change the transmission fluid.
Another recommendation is to check for any transmission leaks by inspecting the area beneath the car for any signs of fluid. If a leak is found, it should be addressed promptly to prevent further damage to the transmission.
Lastly, the customer can schedule a diagnostic test with a certified mechanic to identify the specific issue with the transmission. A professional mechanic will be able to diagnose the problem accurately and provide the necessary repairs or maintenance.