The Yukon Gear pinion adaptor sleeve lets a 28-spline pinion fit into an oversize 35-spline pinion support, enabling use of a stock pinion with a larger support in Ford 9-inch setups. This adapter sleeve is specified for Ford 9" applications and provides a straightforward mechanical solution when changing support sizes during differential rebuilds or upgrades where spline compatibility must be maintained.
Yukon Gear 1.250in Pinion Adaptor Sleeve (Stock Pinion into Large Support)