Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
On A Controlled Opposite-Running Test Stand For AWD Vehicles
With AWD, Testing with a Controlled Opposite-Running One-Axle Roller Test Stand
"Opposite-running" means: the rollers on the one-axle roller test stand are rotated forward on one side and backward on the other side.
During this test, the wheels of one axle are driven in opposite directions, to prevent delivering power to the other axle.
"Regulated" means: the speed of the test stand rollers must be regulated in such a way as to avoid any speed difference during the brake inspection.
The transferring of a force to the rolling wheels in the roller set is prevented by the stationary wheel (outside of the roller set) via the drivetrain.
During testing, the wheel turning forward is measured, therefore two braking tests are necessary on each axle.
Do not exceed a test speed of 6 km/h.
Volkswagen approved test stands meet these requirements.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.