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Have Sumo springs and Bilstien 5100's, and the truck barely drops with the small trailer on. Bringing the truck in to service on Thursday to have the front end checked.
How is it possible to have the truck move once the parking brake is engaged? Trying to hook up either of my trailer, I get the ball under the socket, put in neutral, set the brake and release the service brakes and the truck rolls. I never had that happen with the 14, in fact if I dont use the parking brake the truck will roll back almost 2 inches. So much slop in the drive train.
How is it possible to have the truck move once the parking brake is engaged?
Rear suspension leaf wrap. In other words, the long leaves are still flexing.
Remember, the leaf spring pack is softer than in years past to accommodate a modern ride quality standard, and possibly as well as the lighter weight aluminum body and bed... which is one reason you went with the Sumos to aid your towing efforts.
Rear suspension leaf wrap. In other words, the long leaves are still flexing.
Remember, the leaf spring pack is softer than in years past to accommodate a modern ride quality standard, and possibly as well as the lighter weight aluminum body and bed... which is one reason you went with the Sumos to aid your towing efforts.
First off I would like to say I am no engineer but with the Sumo springs or the active suspension I wonder long term how that is going to effect the springs. It looks like that makes it unevenly load the leaf springs. On my last truck I had a spring shop add a leaf to the pack, they just inserted one in between the original leaves which worked great for the 140,000 miles I owned. That really stabilized the ride, I didn't do it this time because it lifted the truck 2" and these don't have a 2" lift blocks to remove. The other reason even though I didn't notice it stiffening the ride, I think this truck rides a bit stiffer and I was concerned it would stiffen this one.
Your truck shouldn't rock when stopping... Have you tried changing the trailer brake gain?
As for the truck rolling with the park brake, that shouldn't happen! I do exactly what you said (neutral, park brake) when hooking up. My truck doesn't roll at all when I take my foot off the brake, and my driveway is sloped.
First off I would like to say I am no engineer but with the Sumo springs or the active suspension I wonder long term how that is going to effect the springs...
The Sumo, as it appears to me, anyway, is little more than a bigger bumpstop or a soft solid version of an air bag. They're like the Timbren, which is a more expensive and better made version of a bumpstop overload spring.
The Roadmaster doesn't stress the leaf spring pack, it assists it by holding through more of it's travel to it's designed semi-elliptical shape. Granted, the front half (axle forward) of the spring pack is not assisted, but does it need to be? If the lack of assist forward of the axle is at all a determining factor in the overall service life of the leaf spring assembly as a whole, I would think it is so small as to not be a concern.
Your truck shouldn't rock when stopping... Have you tried changing the trailer brake gain?
As for the truck rolling with the park brake, that shouldn't happen! I do exactly what you said (neutral, park brake) when hooking up. My truck doesn't roll at all when I take my foot off the brake, and my driveway is sloped.
Trailer doesn't have brakes, its a 2500# GVWR enclosed cargo trailer with a single axle.
The Sumo springs aren't touching the axle when empty, which is the majority of my drive, and really don't do much of anything until there is a load back there. What I do notice is when I come to a stop and the front end dips, raising the rear, when the rear comes down it will bounce a couple times from the Sumo's.
That being said, the truck did the fore/aft roll prior to adding the Sumo's, so they aren't the cause.
I take it in on Thursday to have the front checked and also mentioned the extra rolling when stopping with the trailer along with the truck rolling after applying the brake.
Sounds sorta normal. Maybe load your weight closer to the front because it seems like the mass is centered too close to the axle which is why it rocks.
Have Sumo springs and Bilstien 5100's, and the truck barely drops with the small trailer on. Bringing the truck in to service on Thursday to have the front end checked.
How is it possible to have the truck move once the parking brake is engaged? Trying to hook up either of my trailer, I get the ball under the socket, put in neutral, set the brake and release the service brakes and the truck rolls. I never had that happen with the 14, in fact if I dont use the parking brake the truck will roll back almost 2 inches. So much slop in the drive train.
This driving me nuts. Rv parking at the side of my house - my trailer is on flat ground but my truck isn't, there's a slight incline so I get the ball dead on, put on the parking brake while pressing the brake, put it in park, take my foot off the brake and...I'm off center ha. I have to take into account the roll back when lining up.
I notice this truck has a LOT more roll than my 14 did. Put it in park and it will roll enough that I need to make sure there is enough clearance between the truck and whatever I park in front of.
Today I was doing some shopping, my dealer sent me a letter saying they will pay 115% of Black book value for my wifes car, so I looked around at 2013-14 F150 and found an FX4 with 7700# GVWR. Where the heck was one of these back in January? Would have snapped it up.
09-16-2017, 04:50 PM
