This GM packaged pocket bearing fits MOST 2013+ TR-6060 transmissions found in all makes of vehicles and is also found in Magnum XL transmissions and the recently released Magnum F.  Some 2012 may have this design.  This is a 'kit' that has the straight roller pocket bearing, a thrust bearing, and a thrust race.  The previous design used a tapered roller bearing design here:  https://www.tickperformance.com/tremec-11-22-mainshaft-small-tapered-bearing-input-shaft-bearing-race/