STP5381LB




SKU: STP5381LB

BRAND: Strange

Billet Aluminium Case Package
Suit 9" & 9-1/2" Gears, 35 Spline, 3.812" Bore With Ball Pinion Bearing


Out of Stock
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Ford 9" Billet Aluminium Case Packages

The Billet Case and billet pinion support offer an unmatched strength to weight combination for the most brutal Drag Racing applications. The goal was to manufacture the finest billet case- regardless of material and process costs- and we have achieved that. The case is manufactured from 7075-T73 aerospace aluminium that offers superior strength and is highly resistant to stress corrosion. After initial rough machining, it is vibratory stress relieved utilizing subharmonic vibrational energy. This process stabilizes the heavily machined aluminium before proceeding. Afterwards, it is solution heat treated and artificially overaged. This ensures consistent mechanical properties throughout the material. The .650" thick mounting flange coupled with the raised cross rib design provides a solid structure to maintain proper alignment of the ring and pinion. Unique wrap around style main caps enhance strength and stiffness. Each cap is retained by four AISI 8740 steel bullet end studs which have 38% higher yield strength than typical chrome moly. This allows for an increase in clamping loads further enhancing cap rigidity. The tail bearing area has massive wall sections to firmly retain the oversized tail bearing, which can withstand greater loads, and is secured by a special retainer plate. A large oil scavenging channel directs additional lubrication to the pinion support. The case has a provision to accept a load bolt which helps support the ring gear during tire shake. The case will accept 9" , 9 1/2", and 10" gear sets. Integrated jack screws facilitate center section removal from the rear end housing.

The Billet Pinion Support is manufactured from 2024-T351 aluminium and retained by 12 ARP twelve point bolts. The support features a unique design which optimizes strength, weight reduction, and bearing lubrication. It places both pinion bearings within the case and has a much tighter fit to the case bore. This firmly holds the pinion shaft in proper alignment with the ring gear, providing maximum gear life while avoiding gear bind. The 10" gear sets require a pinion support designed specifically for those gears. This support eliminates the need for a spacer between the support and the case, further contributing to the integrity of the assembly.

Note: Package includes all necessary components to build a complete center section less spool, gear set, and yoke or coupler

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