Many of our customers prefer to manually rebuild their transmission. We completely understand and even encourage it. Our Allison DIY transmission rebuild kits allow you to get your hands on the transmission rebuilding process with the highest quality of parts in our kits. Our kits also come with full phone and tech support for any questions you may have before, during, or after building to ensure total confidence in your work. You deserve to be confident in your transmission. With our Allison DIY transmission rebuild kits, you'll experience full trust in your end product and gain valuable knowledge on how to build a transmission! See our products below to find the appropriate kit for you.