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Thread: Propride hitch thump
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11-12-2018, 11:05 AM #21
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I am wondering if Ford made changes to the stock controller between your 2010 and my 2015. I have had a lot of others with Ford trucks that are a little older state they have never had an issue. I think your bump with your exhaust braking is the same thing I experienced in the hills around the Smoky Mountains. The truck was using engine and transmission braking to keep the truck from gaining speed going down hill. Then a truck would blow by me and I would get a bump. I also noticed it if I had to apply the truck brakes to help the transmission. I think the trailer would pivot the head going downhill and cause slack in the system, then the trucks going by would cause the hitch to shift the other direction as the truck blew the trailer sideways. Or, when I applied the truck brakes it would cause the bump as the slack would be taken out. I prevented it on the way home by every now and then I would lightly apply the trailer brakes when I was going down hill just to keep the slack out. It seemed to work because I had no issues on the way home and it was very windy that day.
DaleDale & Tammy
Retired U. S Army and Retired Helicopter Pilot
2021 Ford F-350, 6.7L Diesel, 4x4, Lariat Ultimate
2018 Grand Design Imagine 2670MK (sold)
2022 Grand Design Reflection 337RLS
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11-12-2018, 12:05 PM #22
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Some good reading about the Ford Trailer Brake controller on "newer Ford trucks" here
http://www.fordservicecontent.com/Fo...G1692021&div=f
" If towing a heavier trailer, trailer wheel lock-up may not be attainable even with the maximum gain setting of 10.
AND Points to Remember
Note: Do not attempt removal of the trailer brake controller without consulting the Workshop Manual. Damage to the unit may result.
--Adjust gain setting before using the trailer brake controller.
Adjust gain setting, using the procedure above, whenever road, weather, trailer or vehicle loading conditions change from when the gain was initially set.
--Only use the manual control lever for proper adjustment of the gain during trailer setup. Misuse, such as application during trailer sway, could cause instability of trailer or tow vehicle.
--Avoid towing in adverse weather conditions. The trailer brake controller does not provide anti-lock control of the trailer wheels. Trailer wheels can lock up on slippery surfaces, resulting in reduced stability of trailer and tow vehicle.
--The trailer brake controller is equipped with a feature that reduces output at vehicle speeds below 11 mph (18 km/h) so trailer and vehicle braking is not jerky or harsh. This feature is only active when applying the brakes using your vehicle's brake pedal, not the controller.
--The controller interacts with the brake control system and powertrain control system of your vehicle to provide the best performance on different road conditions.
--Your vehicle's brake system and the trailer brake system work independently of each other. Changing the gain setting on the controller does not affect the operation of your vehicle's brakes.
--When you switch the engine off, the controller output is disabled and the display and module shut down.Jerry & Linda
Emma & Abby our Mini Golden Doodles & JR our Amazon Parrot
2017 Reflection 337RLS, Build Date 01/2017, Titan Disk Brakes, Goodyear G614s 235/85/16 G Rated tires
2022 F-450 King Ranch Ultimate, 4,868 lb Payload, Bedrug Bedliner, Andersen Ultimate II Aluminum 5th wheel hitch
http://visitedstatesmap.com/image/FLGANCSCsm.jpg
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02-05-2019, 01:18 PM #23
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Good afternoon sir,
Did you happen to read this post https://www.mygrandrv.com/fo...239#post178239? Seems to be a similiar issue.U.S. Navy Retired
Haz, Gin, CD, and CE
2020 Ford F450 Platinum
2022 GDRV Solitude 378MBS
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02-05-2019, 01:23 PM #24
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02-05-2019, 01:43 PM #25
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sorta sounds like your trailer brakes aren't activating soon enough or strong enough. They need to create drag so that the PP/HA will be in the pull phase and not the floating forward phase.
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