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03-28-2018, 02:38 PM
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#1
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New Member
Join Date: Jun 2017
Location: New Braunfels
Posts: 2
M.O.C. #19943
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Fender Trouble
Just wondering if anyone else has had fenders blowing off while traveling down the road. We have a 3731FL and our fenders on the door side have blown off twice now. It is in the shop again and no one can figure out why just this side is having problems.
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03-28-2018, 03:12 PM
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#2
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Site Team
Join Date: Oct 2005
Location: Carmichael - CA
Posts: 7,356
M.O.C. #4831
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The fenders are attached using #8 sheet metal screws into the J panel. Not a terribly secure method. I assume all the screws have come out, or enough have, to allow the wind to pull the fender loose or off completely.
Many of us use "speednuts" and a dab of Silicon on the back threads to keep the screws tight. Some have gone to bolts and nylock nuts to guarantee they don't come loose.
Either of these options will keep the fender attached where the stock method is just a ticking time bomb.
__________________
Carl (n Susan)
There is more to life than fuel mileage.
2012 Montana 3700RL Big Sky Package towed by a 2015 Ford F350 6.7L PSD 4WD CC LWB
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03-28-2018, 03:13 PM
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#3
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Montana Master
Join Date: Jan 2005
Location: North Ridgeville
Posts: 20,229
M.O.C. #2839
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Quote:
Originally Posted by carl n susan
The fenders are attached using #8 sheet metal screws into the J panel. Not a terribly secure method. I assume all the screws have come out, or enough have, to allow the wind to pull the fender loose or off completely.
Many of us use "speednuts" and a dab of Silicon on the back threads to keep the screws tight. Some have gone to bolts and nylock nuts to guarantee they don't come loose.
Either of these options will keep the fender attached where the stock method is just a ticking time bomb.
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Like he said.
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03-28-2018, 03:26 PM
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#4
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Montana Master
Join Date: Feb 2005
Location: Haysville
Posts: 4,261
M.O.C. #3085
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Agree ... speednuts and silicone
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03-28-2018, 03:32 PM
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#5
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Montana Master
Join Date: Apr 2017
Location: 1000 oaks
Posts: 949
M.O.C. #19630
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There is a large part of one in the Lake Louise area of Canada 
New fender looks great.
Using silicone and speed nuts has slowed the loosening process but not stopped it.
__________________
2011 2955RL Gen-Y Executive Kingpin
2022 GMC 2500HD Duramax/Alison
4X4 Crew Cab/Standard bed.
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03-28-2018, 03:32 PM
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#6
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Seasoned Camper
Join Date: Mar 2017
Location: Menifee
Posts: 73
M.O.C. #19585
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When I brought the 3730 home from Mike Thompsons, 7 of 22 total screws holding both fenders had come out. I went to my "boat supplies" box and picked out some #12 SS sheet metal screws and replaced them. Never another problem.
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03-28-2018, 03:33 PM
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#7
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Montana Master
Join Date: Oct 2017
Location: Bee Branch
Posts: 2,620
M.O.C. #20693
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Quote:
Originally Posted by carl n susan
The fenders are attached using #8 sheet metal screws into the J panel. Not a terribly secure method. I assume all the screws have come out, or enough have, to allow the wind to pull the fender loose or off completely.
Many of us use "speednuts" and a dab of Silicon on the back threads to keep the screws tight. Some have gone to bolts and nylock nuts to guarantee they don't come loose.
Either of these options will keep the fender attached where the stock method is just a ticking time bomb.
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Ditto on good advice
__________________
James & Irene Wilson
Bee Branch, AR.
2017 Ram 1 ton diesel duallyCrew Cab/Long Bed
2018 Montana High Country 381TH Garage Full of Toys
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03-28-2018, 07:17 PM
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#8
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Montana Fan
Join Date: Sep 2017
Location: ALAMEDA
Posts: 227
M.O.C. #20448
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I had a similar problem with my trailer. Only half of the screws had pulled out and the fender had bent at a 90 degree angle. I noticed it and pulled over. Went to a hardware store and put nuts and bolts where sheet metal screws had been no more problem. btw sheet matal screws on 1 slideout had backed out installed larger sheet metal screws so far so good.
__________________
2017 Montana High Country 310RE
2017 Ram 2500 Diesel, 4 wd crew cab, slr, pulrite super glide, short bed, 2 ea 100 Ah LiFePO4 12 volt Deep Cycle Battery
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03-28-2018, 07:25 PM
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#9
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Established Member
Join Date: Feb 2017
Location: Owasso
Posts: 14
M.O.C. #19486
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we in the aircraft industry call the rubber nuting it
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03-28-2018, 08:25 PM
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#10
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Site Team
Join Date: Jun 2011
Location: Wilsey
Posts: 18,799
M.O.C. #11455
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Used speed nuts on the old rig and they held for 7 years and a lot of miles on bad or dirt roads. When we picked up the new rig I showed up at the dealer with speednuts and put them on before we drove off the lot.
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03-28-2018, 08:53 PM
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#11
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Seasoned Camper
Join Date: Jan 2018
Location: Caldwell
Posts: 72
M.O.C. #21136
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Quote:
Originally Posted by DQDick
Used speed nuts on the old rig and they held for 7 years and a lot of miles on bad or dirt roads. When we picked up the new rig I showed up at the dealer with speednuts and put them on before we drove off the lot.
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Ok, I'm not real bright, do the speed nuts work on the sheet metal screws?...
Just got my new 3130, and missing 2 of the screws already..Tempted to go to machine screws with nyloc nuts
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03-28-2018, 09:06 PM
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#12
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Montana Master
Join Date: Mar 2016
Location: Catoosa
Posts: 778
M.O.C. #18384
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Stainless nuts and bolts for me! Sheet metal, sheet metal screws, screw gun....one of the three doesn't belong.
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03-28-2018, 09:49 PM
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#13
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Montana Master
Join Date: Oct 2012
Location: Box Elder
Posts: 4,690
M.O.C. #12947
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Even though the speed nut may indicate it's for a machine screw, it will do the job when using a sheet metal screw. https://www.amazon.com/dp/B00HYK9FIM...a-308831890488
__________________
Bob & Becky
2012 3402RL
2012 Chevy 2500HD D/A CC 4WD
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03-28-2018, 10:04 PM
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#14
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Montana Master
Join Date: May 2017
Location: South East NC
Posts: 1,768
M.O.C. #19865
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Quote:
Originally Posted by gordo
Ok, I'm not real bright, do the speed nuts work on the sheet metal screws?...
Just got my new 3130, and missing 2 of the screws already..Tempted to go to machine screws with nyloc nuts
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8x32 and a washer on at least the front side. Where open due to a cut for the slide to open I put auto door weather strip as it keeps the air from getting behind and lifting. A lot of pressure in an air scoop at 65 mph.
__________________
John & Patty
2022 3855 BR
2019 Lariat F350 4X4 Dually
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03-29-2018, 05:22 AM
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#15
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Seasoned Camper
Join Date: Jan 2018
Location: Caldwell
Posts: 72
M.O.C. #21136
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speed nuts
Thanks to all for the great info...
Told the wife I was gonna get speed nuts, she just gave me "that" look. I wonder if I should tell her....
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03-29-2018, 05:36 AM
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#16
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Montana Master
Join Date: May 2017
Location: South East NC
Posts: 1,768
M.O.C. #19865
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Quote:
Originally Posted by gordo
Thanks to all for the great info...
Told the wife I was gonna get speed nuts, she just gave me "that" look. I wonder if I should tell her....
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Just give her a sly smile and say they will make her very happy.
They really will.
If a fender fell off you would be cranky and.she would not like your mood.
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03-29-2018, 08:32 AM
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#17
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Montana Master
Join Date: Jul 2014
Location: Upstate NY
Posts: 1,788
M.O.C. #14547
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An easy 30 minute and 10 buck or so permanent fix.
After our first trip. I installed some 8-24 or 32 x 3/4 SS machine screws and SS Nyloc nuts (from McMaster-Carr) with a flat washer under that nut. Our HW heater is directly over one of the fenders and two of those holes got SS #10 sheet metal screws. 15,000 miles and 3 years later, none have 'disappeared' or for that matter, even loosened.
__________________
Dave W
2014 Montana High Country 343RL (Sold!)
2011 Ford 6.7 Lariat CCLB (Went to PU Heaven)
2019 F150SC XLT SE Sport,w/full tow package
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03-29-2018, 08:51 AM
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#18
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Montana Master
Join Date: Jun 2014
Location: Vancouver Island
Posts: 894
M.O.C. #14417
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Thanks to gordo and CaptnJohn for a good morning laugh.
__________________
Lenny and Ros
2012 Montana 3400RL,680 Watts Solar,4xT-105 Trojans,GP-ISW2000-12 Inverter,Trimetric 2020, EMSHW50C
2009 Chevy Silverado 3500 LTZ Duramax 4x4 CC Dually, Banks Speed Brake
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03-29-2018, 09:45 AM
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#19
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New Member
Join Date: Jun 2017
Location: New Braunfels
Posts: 2
M.O.C. #19943
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Thanks to everyone.
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03-31-2018, 06:10 PM
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#20
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Montana Master
Join Date: Sep 2017
Location: Willis
Posts: 896
M.O.C. #20587
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Quote:
Originally Posted by CaptnJohn
8x32 and a washer on at least the front side. Where open due to a cut for the slide to open I put auto door weather strip as it keeps the air from getting behind and lifting. A lot of pressure in an air scoop at 65 mph.
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That's what I've done. When I got home after the 3 mile trip from the dealer found most screws loose. Used #8 ss and nylon insert nuts like on our boat after finding the issue on the forums.
__________________
2018 Montana 3791RD (SOLD)
2017 Ram 3500 DRW 6.7 Cummins Aisin, B&W RVK3600 (SOLD)
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