it is not tough , the Factory service manual is the best guide for rebuilding them, you do need a set of flat nse snap ringpliers & a dummy shaft to load the countershaft into the case ,you can either make one from conduit or even heater hose or get the proper tool through from Mopar , not many parts are still available for them shift forks, countershaft thrust washers , brgs 4446326, & gaskets 4106552 are available though
