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| | | Forums66 Topics128,094 Posts1,056,465 Members48,443 | | Most Online14,466
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!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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For helping keep this great
old truck web site
on the Internet for over 30 years! and not clogged down
with Ads!  Again, thanks!
| | | | Joined: Apr 2005 Posts: 313 Shop Shark | | Shop Shark Joined: Apr 2005 Posts: 313 | I have noticed a thumping on the floor of my 1966 C-10 only while driving in the rain. It does not happen when it is dry, and nothing is striking the floor pan. I have new control arm bushings, upper and lower ball joints and shocks. Could it possibly be a bad spring? | | | | | Joined: Feb 2002 Posts: 12,029 Cruising in the Passing Lane | | Cruising in the Passing Lane Joined: Feb 2002 Posts: 12,029 | why/how would a spring react to being wet? "nothing is striking the floor pan"? how about water?  more likely water hitting the back of the wheel housing, which is the toeboard - prolly a function of the particular tread design picking up lots of water, or the texture of yer roads - undercoat the area? Bill | | | | | Joined: Apr 2000 Posts: 179 Shop Shark | | Shop Shark Joined: Apr 2000 Posts: 179 | Water can spray with quite a bit of force when driving through standing water. Try pushing up from beneath where you think the noise is coming from and see if the sheet metal 'pops' when you let off.
Joe McNeel
http://mcneelnet.com/~jmcneel/59.html
| | | | | Joined: Jan 2005 Posts: 1,682 Extreme Gabster | | Extreme Gabster Joined: Jan 2005 Posts: 1,682 | Is the thumping accompanied by a shrieking voice saying, "Hey! Stop the truck, @sshole!!!" ?  In all seriousness.. is it a constant 'thump thump thump'? Does it seem to get more frequent the faster you drive, or with increased RPMs?
an idea is only stupid if you think about it rationally.
| | | | | Joined: Jul 2006 Posts: 584 'Bolter | | 'Bolter Joined: Jul 2006 Posts: 584 | Thats funny, and wrong on many levels...including the visual! | | | | | Joined: Nov 2000 Posts: 700 Shop Shark | | Shop Shark Joined: Nov 2000 Posts: 700 |
My 1941 in the Stovebolt Gallery
My Photo AlbumBut I tried, didn't I? ... At least I did that. RP McMurphy
The past belongs to the future...but only the present can preserve it.
Besides the noble art of getting things done, there is a nobler art of leaving things undone. | | |
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