3504-04 Pinion Yoke
1350 series with 30 splines, spline diameter of 1.312 inches, and hub diameter of 2.110 inches. Thru hole measures 1.150 inches, with a centerline to end measurement of 3.125 inches. BS style, classified as light duty (LD). This pinion yoke fits the GM 9.5″ differential and includes a speedy sleeve on the hub, which can be removed to reveal a machined surface dimension of 1.940 inches (not a ground hub).
Note: See 3504-85 for a 1.940″ seal hub option. Requires strap kit 3570-20 and includes a new pinion seal, necessary for all applications before 2000. From 2000 onward, GM switched to synthetic oil requiring a triple lip seal with a larger ground hub diameter. This yoke is compatible with 2000 and newer trucks without needing to change the original seal.
Applications for GM 9.5″:
- 1 Ton GM Pickup (Rear): 1982–1995
- 1 Ton GM Van (Rear): 1982–1995
- 1/2 Ton GM Pickup (Rear): 1988–2006
- 3/4 Ton GM Pickup (Rear): 1979–2006
- 3/4 Ton GM Van (Rear): 1981–2006
- Avalanche (Rear): 2002–2006
- H2 (Rear): 2003–2006
- Suburban 3/4 Ton (Rear): 1988–2005
