If I put the Transgo Jr. in wiil it void my warranty?

Only if they find it :cool:
but I dont think they will

There is no way they would even know-- only visible place is the larger holes in the valve body separator plate. And they would have to take it all apart to find it. It would take a really good Allison mechanic to even find that. Nothing to worry about! :)

Of course if you screw up the trans with the install, and take it for transmission warranty, they may find it and then charge you!:cool:

Well thanks for the awnsers will be ordering it soon with some other goodies...