I was having some issues with my 2009 Chevrolet Silverado Transmission (6L80). I called Perry at National Engine & Transmission and he was very helpful. He answered all my questions and provided all the necessary details I required. I'm not from Abilene, so I didn't know anyone locally to recommend a reputable shop. First, I had the shop run a diagnosis, to see if any codes were being thrown. Fortunately, everything with the transmission checked out as ok. After the diagnosis, they didn't try to push any unnecessary parts or service, they were very honest and helpful. In fact, during the transmission diagnosis they even found some other issues with the truck, brought them to my attention, and I was able to make the repairs myself. This definitely made me feel like I got all the bang for the buck of the diagnosis fee - the checked more than just the transmission! Since the transmission didn't require any service, I paid for the diagnosis and went on my way. After some thinking, even though I didn't NEED repairs right that moment, I had them quote me a price for a torque converter change. With the truck having 142k miles on the original torque converter/transmission, I wanted to do a little preventative maintenance, especially since I tow a travel trailer throughout the summer (and I've heard the stock converters are a little weak). I was extremely impressed with both their attention to detail and turnaround. Throughout the process, I made several phone calls and asked several questions about how it was going and details of the parts they were using, etc. They were very patient with my questions and kept me well informed. After only 2 days, the truck was complete and Perry called me to come pick it up. Unfortunately I was running late getting off work, and didn't think I'd make it to the shop before closing time. Perry was kind enough to stay behind after closing hours as I rushed over after work to pick the truck up. For anyone needing Engine or Transmission work, go see the guys at National Engine and Transmission. Honest, Reliable, Knowledgeable, and Timely!