don't drive in the rain grin might be something installed wrong or badly worn in the linkage, but the excess sweep at speed is a common problem for the TF trucks I've had from wind action and windshield shape - the 'gouging' occurs from running bad wiper blades, usually very hardened rubber, sometimes nearly no rubber, on dirty dry glass

Bill

Moved over to the Passing Lane

"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir
"When we tug a single thing on an old truck, we find it falls off" ~ me
Some TF series details & TF heater pics