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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: Jun 2022 Posts: 557 'Bolter | | 'Bolter Joined: Jun 2022 Posts: 557 | I took the wiper motor out of my 54 3100 and lubed it up good trying to get them to work again. Motor worked real good sitting on the fender.. put it back together and it still cycled to the windshield edge and quit.
Took my daily 15/20 mile ride today when out of the blue they started working like a goose getting airborne at the pond... FopFopFopFopFopFop! Weren't working as they should but working non the less. Back to the shop.
Come to find out that the trans arm was hanging up on the repop defroster vent seam. A sharp wood chisel carved out the offending plastic and now they work like new. Hallelujah! Saved me a bunch of bucks replacing the motor!
I'm stoked!
Jethro.
~~ Jethro 1954 3100Back to LifeIn the Dity Gallery1951 3100 (gone) / 1956 4400 (still in the neighborhood) / 1957 6400 with dump body (retired) / 1959 3100 panel (in the woods junked) / 1978 Custom Deluxe K10 / 1993 S-10 4.3 / 2004 Chevy Crew Cab / 1945 John Deere H / 1952 John Deere B / 1966 John Deere 2510 / 1967 John Deere 1020 | | | | | Joined: Sep 2009 Posts: 5,918 Gearhead, Stovebolt Tech and Parts Tracker, Mod for Swap Meet and GTT | | Gearhead, Stovebolt Tech and Parts Tracker, Mod for Swap Meet and GTT Joined: Sep 2009 Posts: 5,918 | Jethro, That's good info!  Got any pictures to share on the repop defroster vent seam "modification" so others may know what to look for if they have a similar problem??? Thanks for sharing. 
~ Dan 1951 Chevy 3 window 3100Follow this story in the DITY Gallery"My Grandpa Carl's Truck and How it Became Mine"1966 Chevelle (Wife's Hot Rod) | 2013 Chevy Silverado (Current daily driver) US Army MSG Retired (1977-1998) | Com Fac Maint Lead Tech Retired (1998-2021)
| | | | | Joined: Jan 2000 Posts: 734 'Bolter | | 'Bolter Joined: Jan 2000 Posts: 734 | Congrats Vacuum wipers look great flopping back and forth. Intermittent pauses, speed ups and slow downs...You can tell they aren't electric and really adds to the charm of an antique vehicle, IMO. Until they're all you have in a rainstorm.  They work even better when paired with Rain-X.
Matthew 6:33 1952 Chevy 1/2-ton 3100 Late '55 235/SM420/torque tube 3.55 Dalton Highway survivor (using original 216) www.truckwithaheart.com | | | | | Joined: Jun 2022 Posts: 557 'Bolter | | 'Bolter Joined: Jun 2022 Posts: 557 | Naaa... I looked under the dash as I operated the switch and saw the defroster hose move when the arm stopped. Took the glove box out for access and saw where the arm had been contacting the duct... right on the seam. Took the arm loose from the motor, operated it by hand and saw where I needed to trim. Used a sharp wood chisel and removed a big enough V from the seam to clear the arm. Bingo.
The repop is 2 pieces sealed together leaving a 3/16 or so seam. The original was most likely metal with no seam. The repop fit the truck perfectly with pop rivets but that dastardly seam was in the way.
Soooo... if someone has repop ducts and the wipers stop at full cycle, look for interference with the trans arm.
~~ Jethro 1954 3100Back to LifeIn the Dity Gallery1951 3100 (gone) / 1956 4400 (still in the neighborhood) / 1957 6400 with dump body (retired) / 1959 3100 panel (in the woods junked) / 1978 Custom Deluxe K10 / 1993 S-10 4.3 / 2004 Chevy Crew Cab / 1945 John Deere H / 1952 John Deere B / 1966 John Deere 2510 / 1967 John Deere 1020 | | | | | Joined: Sep 2009 Posts: 5,918 Gearhead, Stovebolt Tech and Parts Tracker, Mod for Swap Meet and GTT | | Gearhead, Stovebolt Tech and Parts Tracker, Mod for Swap Meet and GTT Joined: Sep 2009 Posts: 5,918 | Thanks for the corrective action description Jethro - LOL!  I wouldn't want to get up under there for pictures either - haha.  I was not familiar with the repop duct construction, so thanks for explaining the situation. Dan 
~ Dan 1951 Chevy 3 window 3100Follow this story in the DITY Gallery"My Grandpa Carl's Truck and How it Became Mine"1966 Chevelle (Wife's Hot Rod) | 2013 Chevy Silverado (Current daily driver) US Army MSG Retired (1977-1998) | Com Fac Maint Lead Tech Retired (1998-2021)
| | | | | Joined: Dec 2018 Posts: 2,450 'Bolter | | 'Bolter Joined: Dec 2018 Posts: 2,450 | Jethro Good information saw 2 or 3 wiper motors in my pile may try to use one on your good fortune. | | |
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