[HO455]

To Doc's point my Burban's been in northwest Oregon since new and a couple of years back I had to Iocate a good used set of wiper posts as mine were plum worn out. I could wiggle the posts back and forth more than 1/8" and if I used them for more than 15 or 20 minutes continuously they would start squeaking.

Man! Talk about annoying.

The rest of the joints were fine once cleaned and lubed.

I actually removed the firewall seal and cleaned 50 years of dried grease and dirt off of the shaft under the seals lip. That alone made a noticeable difference in speed on mine. That being said the wipers on these trucks are slow. The high speed is actually slower than many modern vehicles slow speed.

I find the high speed on my Burban is actually useful, unlike many vehicles, where if you need that fast of a wiper, it's raining so hard you can't see past the end of the hood and it's time to pull over.