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10-19-2022, 10:36 AM
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#1
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New Member
Join Date: Oct 2020
Location: Pinckney
Posts: 3
M.O.C. #27231
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Brakes
Have a 3020 3790rd pulling with 2019 ram Laramie 3/4 when backing in drive after a trip brakes go to floor at idle when pulling it they are ok I took to Dodge dealer and explained to dealer they said nothing wrong with brakes? Anybody having this problem?
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10-19-2022, 12:13 PM
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#2
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Montana Master
Join Date: Jan 2022
Location: Shingle Springs
Posts: 2,236
M.O.C. #30417
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If your brake pedal bottoms out trailer or no trailer you have a problem! Find a new mechanic 
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Tony & Donna
2022 Montana HC, 295RL, Solar Flex 400, Onan 3600 LPG, 2K inverter, 200AH Lithium. 2020 GMC Denali 2500 6.6 Duramax, Demco 21K Auto Slide
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10-19-2022, 12:36 PM
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#3
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Montana Fan
Join Date: Jan 2021
Location: Coloma, Wisconsin
Posts: 202
M.O.C. #28036
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Potentially brake booster issue...not safe, agreed on finding a knowledgeable mechanic.
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Chuck
2019 3121RL 35 ft., 2020 3500 Dodge Ram SRW, Cummins 6.7 HO, Air Bags - Air Lift BT Wireless Compressor, Coloma, Wisconsin
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10-19-2022, 01:40 PM
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#4
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Montana Master
Join Date: Dec 2009
Location: Sebring
Posts: 3,659
M.O.C. #9969
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I would check the Brake Fluid first to make sure you have the proper amount of fluid.
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Michelle & Ann
2018 Chevy 3500HD High Country DRW 4X4 Crew Cab w/Duramax/Allison, Formally 2010 Montana 2955RL, Now Loaded 2016 SOB, Mor/ryde IS, Disc Brakes & Pin Box, Comfort Ride Hitch, Sailun 17.5 Tires.
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10-19-2022, 02:18 PM
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#5
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Montana Fan
Join Date: May 2015
Location: fargo
Posts: 185
M.O.C. #17461
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The brake pedal should never go to the floor, definitely something amiss.
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10-20-2022, 04:29 AM
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#6
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Montana Master
Join Date: Oct 2019
Location: Jacksonville
Posts: 2,141
M.O.C. #25165
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That's only one problem. If you're pulling with a 3/4 ton RAM, that's a heavy trailer!
I have a 2019 3791RD and I'm at 15,600 lbs.
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Robert & Diana McNeal
2019 Montana Legacy 3791RD 20th Anniversary Edition
2014 F350 4x4 6.7L SRW
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10-23-2022, 02:59 PM
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#7
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Seasoned Camper
Join Date: Mar 2020
Location: Kingsport
Posts: 55
M.O.C. #25935
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My RAM 2500HD is supposedly rated for 16,400, but the payload cap is 2,950. The 3790 has a pin weight somewhere around 2,700, which only gives you 250 pounds left for passengers gear and fuel.
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Maurice & Patricia & Bella & Tigger & Allana & Maximus
Kingsport, TN
2020 MHC 331RL
2014 RAM 2500HD SLT LB 4x4 6.4L SRW
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10-23-2022, 03:25 PM
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#8
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Montana Master
Join Date: Mar 2020
Location: Lamesa
Posts: 621
M.O.C. #26010
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Quote:
Originally Posted by Moondragon
My RAM 2500HD is supposedly rated for 16,400, but the payload cap is 2,950. The 3790 has a pin weight somewhere around 2,700, which only gives you 250 pounds left for passengers gear and fuel.
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The OP's trailer is 16,600gvw. At 21% pin @ gvw would equal 3652lbs. which will be more than the payload of the 3/4 Laramie. At 23% = 3818. Empty weight which it can't and won't be is 13,950 @ 22% = 3069lbs. Maybe the brakes have finally said "I give" after trying to stop that much?  A trip to the scale would be highly recommended.
As far as the brakes I had a new SUV do that a couple of times at startup - very disconcerting. It never did it again. You said it was after a trip so I assume immediately after. Did it happen only once? Was it a hard trip (braking)? As others mentioned you need to look it all over then have someone very knowledgeable check it out. As I'm sure you know brake failure with that big of a trailer behind you will not be fun.
I take my vehicles to the dealer any more so don't tear into them anymore but I'm wondering if there isn't some sort of computer interaction with the brake pedal/feel that might be affecting it in some way?
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Danny and Susan wife of 55 years
2019 Ram Laramie 3500 6.4 4x4 CC 4.10 SRW
2020 Montana High Country 331RL
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10-23-2022, 09:10 PM
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#9
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Seasoned Camper
Join Date: Jun 2018
Location: Estherville
Posts: 53
M.O.C. #21904
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Doesn’t that Dodge use the steering hyd pump for the brake pressure assist. My 99 gas one ton and 2006 2500 does. Make sure you have adequate steering fluid if that is the case. There was an update on my 2006.
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