ST4-917

Transverse 4WD gearbox

Circuit

Hill Climb

Rally

Rallycross

Drift

The SADEV ST4-917 is a titan of rallycross. Every one of Team Hansen’s victories in the World Rallycross championship since 2018 have been powered by this gearbox, a testament to its engineering quality.

Designed as a distinct alternative to traditional longitudinal gearboxes, the ST4-917 transverse has allowed rallycross teams to explore new Supercar designs. It’s so good that several of Team Hansen’s World RX rivals started using it!

While the ST4-917 is the class of the field in rallycross, it’s also an excellent option for use in other applications like hill climb, circuit racing, rallying and even drifting.

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Specification

Max Torque: 1000Nm

Six-speed sequential gearbox + one reverse gear

Manual sequential gear selection

Front to rear bevel gear ratio: 26×22

Final drive ratio: 25×39

Epicyclic geartrain ratio: 2778

Bevel gear cut and grinded in-house on SADEV’s CNC units

Wide range of ratios available

Straight cut gears

Dog ring gear engagement

Interchangeable gear ratios

High strength carburizing steel

Gear teeth grinded with optimized profile

Shot penning on internal parts

Specific input shaft

Low friction limited slip differential

Ramp and plate system – three discs type

External preload adjustment

Wide range of ramp plates available

Reverse lockout cable or option of solenoïd

Directed and pressurised lubrication on the gears and bevel gear

Oil suction screen

Magnetic drain plugs

Weight (input shaft included) : 59kg (130lbs)

Accessories

Bell housing

Starter crown wheel

Driveshafts

Propshaft

Discover your solution

Know what you're after? Or need some guidance on how to spec your transmission? Either way, your next port of call is Kenneth Hansen.

Get in touch to discuss your requirements.

Contact Kenneth