Strange Engineering S-Trac Helical Differential for 9in Ford

Strange 35 Spline S-Trac
This helical gear differential offers smooth and progressive power transfer
Superior design and quality make it ideal for the most abusive Street/Track applications
Features Torque Biased, Mechanical & Clutchless
• Maximizes traction and acceleration
• Dependable and maintenance free
• Quiet operation
Learn More: www.strangeengineering.net/pr...

[@charwunsee]

Is there preload on this?
I have a TruTrac in one of my cars which is..... ok. But I've got it setup pretty rigid and as soon a I lift a wheel like going up a gutter/driveway it just turns the lifted wheel.
0 traction × any torque = 0 drive

[@strangeengineering]

The N1980 S-Trac differentials are set up with preload. This will prevent the unit from slipping.
If you have a unique application that may require more preload in the unit, we do have options.
Please contact our tech department at 847-663-1701 to go over your application and we will be able to direct you into the best unit for your application.