Hard Parts

Compound Low, Non- Rotational Ring Type, Includes OH Kit, Filter, Bypass Valve, Planet Nut, Steel and Frictions

Direct; 6 Clutch; Stamped Steel; 34T Steels

Billet aluminum housing increases OD apply area by 16% and holds a physically taller clutch pack. The 2X thicker steels increase clutch pack steel mass by 28% for maximum heat dissipation. The double-sided BorgWarner clutch frictions are optimized for the 68RFE OD application and custom-made for the Sonnax kit. This guarantees an unrivaled combination of squawk resistance and maximum clutch capacity for any truck. This groundbreaking kit is the only top-of-the-line upgrade that eliminates clutch problems without relying on valve body/pump modifications or adding the expense of extra components.Modified housing holds physically taller clutch pack for 20% more clutch capacity, 16% More OD apply area for firmer, more controlled shifts, 2X Thicker steels and double-sided clutches increase steel mass by 28% for maximum heat dissipation, Custom BorgWarner clutches for maximum capacity with state-of-the-art squawk resistance, Bolt-on anchor plate eliminates clutch pack flexing and distortion that contribute to heat build-up, Combine with Sonnax line pressure booster kit RFE-LB1 for even higher levels of performance

Steel Type; Molded Seal

Forward & Direct, 1-2-3-4 & 3-5/Reverse, 8-5/16" OD, 4.555" Tall, Updated; Includes Pistons, Frictions, Steels

Stator, 36 Spline, 9-1/8" Long, Steel Ring Land, Non Rotational Ring Type **SERVICE TIP; Add Part # T104531CK**

Boost Valve and Sleeve .500" Diameter, Steel; Includes Springs, Spacer and Snap Ring

Billet Steel, Stage 1, Stage 2, Stage 3, Diesel Performance

Steel Type; Molded Seal

Forward & Direct, 1-2-3-4 & 3-5/Reverse, 8-5/16" OD, 4.930" Tall, 0.170" Snap Ring to Top of Drum, 4.930" Tall, Updated; Includes Pistons, Frictions, Steels

Steel Coast Drum Type; Pulse Width Modulated (PWM) Seal Ring Above Stator Bushing

Hardened Steel

Pump Flow Control, Drop-In

Overdrive; 4 Gear, Steel; 1 7/16" Long Hub

Replacement Kit For S72961BSTK, Includes 5 Steels & 6 Custom Frictions

Billet Steel, 27 splines, direct oiling design, Stage 1, Stage 2, Stage 3, Diesel Performance