they're called [felt] window channels - the top and back are one piece with a flexible metal core, just rip it all out, the front [on division bar] you have to cut/scrape out the felt and glue in replacement felt, or get a new division bar with the rigid metal channel factory finished - see here near the bottom

also, if yours is original there will be small clips that stab into the channel backside to hold it tight, do not lose those, they're not available repro

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 & Rust-a-holics Unanimous parking lot