Pinion Spline: 31 or 37
Plymouth Belvedere (1963-1970)
- *Note: This gear package does not fit 2010-2014 applications with a 3
Chevrolet Silverado 1500 (1999-2000)
Differential Case Design Type: Dana AdvanTEK M186
NP136, NP236, NP246, NP249, NP261 & NP263 Transfer Case Oil Pump Gear Packages - Ford 9.75” Rear 1997-1999.5 Pinion Spline: 31 or 37Transfer Case Parts by USA Standard Gear Description NP136 , NP236 , NP246 , NP249 , NP261 & NP263 Transfer Case Oil Pump Manufacturers Info USA Standard Gear USA Standard Gear sets the standard for quality parts at affordable pricing. As a brand, USA Standard encompasses ring & pinions, axles, driveshafts, transmission and transfer case components, and installation kits, as well as the popular Spartan Locker the toughest lunchbox locker on the