NP246, NP261, NP263 1999-Up General Motors Full-Size Truck Front Output Seal Installation Number Tool T-M109RAC.
Easily places this expensive two-piece seal where it needs to be, every time.
Precision milled from durable DuPont™ Delrin® (an Acetal resin). In one simple motion this seal driver simultaneously accomplishes three things:
1) Pilot centers tool inside the output shaft as milled cavity accepts splines
2) Outer recess drives outer seal into the case
3) Raised surface drives inner sleeved wiping seal onto the output shaft