SCS Quick Change Gear Set – 6 Spline – Set 623 – 4.11 Ratio 2.99 / 5.65 – 4.33 Ratio 3.15 / 5.95

Manufactured from 9310 aircraft alloy for maximum strength, 6-spline quick-change gears are crown-hobbed, broached for 6-spline shaft fit, and black oxide finished for corrosion protection. Gears undergo a five-step heat-treating process to deliver maximum durability.

Since 1979, SCS Gearbox, Inc. has been listening to it’s customers! When SCS Gearbox first started manufacturing, it was to meet the needs of tractor pullers to provide specialized gearing for their tractors and trucks. As SCS Gearbox reputation for producing a quality product that works in their applications spread through the racing industry, customers, from different aspects of racing have called with their specialized needs. As a result, SCS Gearbox has designed and manufactured a product line that includes items for tractor and truck pulling, monster trucks, mud boggers, Circle Track Quick Change Gearing, APBA and International Offshore Boat Racing. The innovation process never stops! SCS Gearbox designs are always evolving to Go-Faster and be Stronger! SCS Gearbox manufacturing process includes CNC machinery to insure the quality and consistency of our products!

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