Check Differential (Pumpkin) for Metal Shavings

What happens here

On heavy-duty trucks, it's crucial to inspect the differential (often called the 'pumpkin'). Locate the drain plug on the differential housing (usually on the front or rear). If safe and accessible, remove this plug. The fluid should be just up to the rim of the hole. More importantly, examine the plug for metal shavings. If you find fine metal shavings, it indicates that the rear end needs replacement. If you find larger 'chunks' of metal, it signifies severe internal damage, and the truck should likely be avoided. *Note: This specific check might be difficult or impossible on smaller pickup trucks due to different differential designs.*

Goal: For heavy-duty trucks, inspect the differential fluid for metal contaminants by removing the drain plug. This can reveal significant internal wear.