In addition to fixing whatever the issue is, there is one other trick that really helps the wipers in these trucks. If you go one size shorter than stock on the wiper blades it makes a huge difference in performance. They move much faster.

-Jon

70 challenger convertible. 340/5 speed. blown, intercooled, efi, blah blah blah 71 valiant scamp 318/A833OD/AC/PS 00 dakota RC 4.7L 5 spd autoX'r. SRT10/T56 swap in process 73 W200 Power wagon, PTO winch, 4 spd