How to Upgrade Your GM Allison 10L1000 with the PPE Deep Transmission Pan | Duramax Tutorial

The video, hosted by Nick from Duramax Service Center, demonstrates a pan replacement on a 10L 1000 transmission for a 2024 GMC L5P Duramax Diesel. The video highlights the benefits of using a PPE-style pan over the stock one, particularly the convenience of the drain plug which simplifies fluid changes and reduces mess. The PPE pan also offers increased capacity, helping to keep the transmission fluid cooler.

Nick provides a detailed step-by-step guide on replacing the pan, starting with draining the stock pan by removing the check plug and the internal filter held by two 8mm bolts. He emphasizes the importance of properly installing the new internal filter with the O-ring to avoid fluid leaks.

The installation process involves cleaning all surfaces, setting up the pan gasket with bolts, and torquing them in a star pattern as per the instructions. He explains the use of a transfer pump to fill the transmission and the correct procedure to ensure proper fluid levels.

Nick advises filling the transmission until fluid starts coming out of the check plug, then running the engine briefly to circulate the fluid before topping it off again. He notes that the optimal fluid level should be checked at a specific temperature range recommended by GM, ensuring a slow steady stream from the check plug for correct fluid level.