BigD

The trucks are required to have 1 driveshaft safety loop 6 inches MAX rearward of front u joint. A loop is only required if you are running quicker than 13.99 with slicks or 11.49 with street tires.


2:4 DRIVELINE
In place of a crossmember, in the vicinity of the front universal joint, all RWD cars running 13.99 or quicker with slicks and 11.49 or quicker with street tires must have a retainer loop 360 degrees of enclosure, 1/4-inch minimum thickness and 2 inches wide, or 7/8-inch x .065-inch welded steel tubing, securely mounted and located within 6 inches of the front universal joint for support of the driveshaft in event of U-joint failure. Open drivelines passing any part of the driver’s body must be completely enclosed in 1/8-inch minimum-
thickness steel plate, securely mounted to the frame or frame structure.
GENERAL REGULATIONS 35