I like the idea of new arms and I'm sure they work much better. However....
The weak link in our wiper system is the rods off the motor. They use plastic cups. At the age of our trucks too much friction my cause these to fail. I have spent literally hours working on my wipers. These cups are not available from what I could find. I had to get junker ones.
You don't want too much strain on these rods. You may even find with old wiper motors they won't move quick enough back and forth due to the extra tension on the glass.
Hola. Sorry to resurrect a slightly old post, but my wipers won't work unless the glass is wet. And even then, they're slow as molasses. Any advice on whether I should rebuild the motors or replace them would be appreciated. Search is pulling up fairly useless threads so far.
Thanks!