By far hands down the best transmission I’ve put in my truck. I have had the best customer support and they truly care about their product and customer concerns. Don’t look anywhere else!
May 2022
I called Ryan at 9:15am had a transmission for my 15 lml in the mail 6 hours after that conversation was a pleasure to work with exited to see how the transmission works out thanks again for keeping the dream alive ❤️
February 2021
Ryan is amazing to deal with, super informative and offers a lot of tech support if needed. Super excited to doing more work with him in the future. And they sell very high quality kits as well. One of there kits in my 800hp+ Duramax and doing another one in my wife’s lly now. Keep up the good work
Xcalliber (Formerly Defeo MFG) is Manufacturer and supplier of stock and performance parts for Allison Transmissions of all vocations.
A full line of stock and performance upgraded Allison Transmissions, dyno tested and available to ship for both commercial and GM/Duramax Applications.
Offering the largest inventory of parts and transmission cores, at the best pricing in the industry since 1984.
Repair, replace, or upgrade your Allison Transmission today!
