Northern Colorado Drive Line Service (NCDLS) guarantee’s all new and remanufactured drive shafts against any defects in materials or workmanship for a period of one year from date of purchase. Return defective drive shaft to us prepaid with proof of purchase. If after examining the drive shaft, we conclude that its failure is due to a defect in the materials or workmanship, we will repair or replace the drive shaft free of charge. This warranty is valid only when the drive shaft is properly installed into a properly working drive train. Any chasis modification or use of vehicle for other than OEM intentions shall void warranty. I.e.., lift kits, racing, off road, etc. Under no circumstances will we recognize claims for labor charges, direct or consequential damages. This warranty is also valid only on drive shafts balanced in our shop.