Join Date: Apr 2000
Location: Danville, CA USA
Correct, it will definitely not be worse than an open diff. You can ride the brakes and the throttle at the same time. That will help increase the locking of the differential, while keeping the torque delivered to the rear tires low in low traction conditions.
Yes, stay away from the F150 spring. At most a stock spring. If you don't mind pulling the cover off, you can try it with no spring. For autox, the only time you'd have problems is if one rear tire was lifted in the air, but in that case you have a suspension problem that needs fixing. Using a differential with more locking would be a massive crutch for this situation.
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