How does one replace the Retainer Bushing on the Drive Link Arm in the 1977 New Yorker? We have the manuals and found the appropriate pages (p8-161, Fig. 12 Windshield Wiper Linkage P, D, and C) but cannot get that retainer bushing to come through the hole. Tried squeezing it with pliers. Gently pounding on the Drive Link Arm (supported by a block of wood). I fear we are just damaging it beyond the point of use. Thanks.