The stock rear drive shaft was toast when I bought it. Swapped ina driveshaft from my other truck and it ate that one up in a week. Now the stock driveshaft is back in after being rebuilt, but I'm nervous its days are numbered. The truck came with a lift, ARB bull bar w/winch, and a rear swing out bumper. At this point the front wheel-fairing distance is measuring 3/4 inch lift and the rear is measuring 2 inches. Could my springs be bad? Please advise.