I'm hoping maybe someone can help me out here because trying to get information from manufacturers and suppliers on this subject is almost impossible. I'm working on a truck that is a track only drag racing application, and I want to do something to help out traction in the front end a little. I know ARB makes a locker and Eaton used to make the E-locker, but I would prefer to not have this thing locked up solid for safety reasons. Detroit used to list the Truetrac 9.25 diff as working in our axle, but they no longer do and when I called couldn't tell me why. Nitro Gear makes a similar front diff that was originally listed as working for that application according to Dmax Store, but they say it doesn't fit and never was listed for that application. Does anyone why they claim to not fit or work, or can anyone tell me a diff that does fit and work? I don't mind doing some light modification to make it fit, but I want to get some idea about what I'm getting into before I buy parts and have to start taking measurements. I did a search and found some old threads that briefly discussed this topic, but there was no real useful information.