Low speed vibration solved.

Had deaver 3 pack and DRs installed on my o6 cc Titan, soon started to notice a low speed vibration, getting worse. Talked with Greg at PRG, suggested removing the third or top leaf spring from the spring pack,as the deaver pack lifted the truck 4". Thinking was that the drive shaft angle changed enough to cause the vibration. As the spring was removed found that the spring pack through bolt threads on the drivers side had been stripped allowing the pack to shift causing the vibration. Soooo, pulled the top leaf, installed PRG traction bars, all is now well, no axel wrap, no vibration and a terrific ride.