The Power Driven Billet Low/Reverse Servo is designed for 47RH, 47RE, and 48RE transmissions (1994-2007) and is constructed with a heavy-duty steel center pin and a billet aluminum piston. This is a recommended upgrade for full manual valve body use, racing, or to repair transmissions with a broken stock cast low/reverse servo. The Power Driven Billet Low/Reverse Servo is compatible with: 1994 Dodge 5.9L 12v Cummins 1995 Dodge 5.9L 12v Cummins 1996 Dodge 5.9L 12v Cummins 1997 Dodge 5.9L 12v Cummins 1998 Dodge 5.9L 12v Cummins 1998.5 Dodge 5.9L 24v Cummins 1999 Dodge 5.9L 24v Cummins 2000 Dodge 5.9L 24v Cummins 2001 Dodge 5.9L 24v Cummins 2002 Dodge 5.9L 24v Cummins 2003 Dodge 5.9L 24v Cummins 2004 Dodge 5.9L 24v Cummins 2004.5 Dodge 5.9L 24v Cummins 2005 Dodge 5.9L 24v Cummins 2006 Dodge 5.9L 24v Cummins 2007 Dodge 5.9L 24v Cummins *May not work for all builds due to other engine/vehicle modifications