oooh good idea! And i wont have to remove the seat, i dont have any trouble getting under thereFingernails on a chalk board! I believe it is all motor too. Crawl up under the dash (take out the front seat) and disconnect the linkage. Then you will know for SURE if it's motor or linkage.
Then you must be younger and more agile than me.
Take a video of how loud the motor is, and take it back. Cardone is notorious for cleaning and repairing rather than "rebuilding".New more expensive motor didnt fix it.
Im at a loss. Wiper transmission itself moves freely without issue.
No sticking/grinding ext.