Allison Valve Bodies

Even though the stock valve body in your Allison 1000 transmission does its job pretty well at factory power levels, once you start throwing some serious power adders on your HD Silverado or Sierra build or towing extremely heavy, the OEM Allison valve body can start to let you down. Tier One's high-pressure Allison valve bodies are purpose-built to handle all the power your 2500 or 3500 Silverado or Sierra is spitting out, all while delivering excellent shifting and reliable operation. Tier One's high-pressure Allison valve body designs feature upgraded internal components and new OEM electronics that work together to give your truck a valve body that delivers reliable operation even if your truck is towing heavy, ripping around off-road, or tearing down the drag strip or sled pull. Also check out our Allison transmission rebuild kits or our Allison PTO covers!