Suspension issues with level+35s
Thread Starter
Junior Member
Joined: Jun 2018
Posts: 10
Likes: 1
From: Fallon, NV
Suspension issues with level+35s
So I've come here because I can't find any answers anywhere else. I installed a Rancho quiklift leveling kit (which included the rear RS900 shocks) and now have 35x12.50 Nitto Ridge Grapplers on a 2015 XLT with the max tow package. The truck rides great on smooth roads or while towing, however on rough roads things get pretty hairy. I recently took a road trip to California (worst roads ever!) and over rough roads the truck would start to "walk" into the next lane. This was especially scary when in a curve. Has anyone else had this problem, or am I the only one? Need help with this one as the truck was nearly uncontrollable.
Senior Member
Joined: May 2018
Posts: 167
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From: Off-the-Grid Colorado 8500'
So I've come here because I can't find any answers anywhere else. I installed a Rancho quiklift leveling kit (which included the rear RS900 shocks) and now have 35x12.50 Nitto Ridge Grapplers on a 2015 XLT with the max tow package. The truck rides great on smooth roads or while towing, however on rough roads things get pretty hairy.
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Thread Starter
Junior Member
Joined: Jun 2018
Posts: 10
Likes: 1
From: Fallon, NV
Its way worse than just tracking, the entire back end of the truck goes to one direction. The front seems to be much more stable then the rear.
Senior Member
Joined: Apr 2015
Posts: 300
Likes: 98
From: Louisiana
Tire are 12-ply (aka very hard) and the back of truck is very light. What you’re experiencing is normal for a new F-150 with 35’s. Adding a rear sway will help a little bit but other than that only solution is to slow down on really rough roads.
Well, there is one other thing that might help: add weight to the rear end (sand bags, metal plates, etc) but it’s not an ideal solution.
Well, there is one other thing that might help: add weight to the rear end (sand bags, metal plates, etc) but it’s not an ideal solution.
Thread Starter
Junior Member
Joined: Jun 2018
Posts: 10
Likes: 1
From: Fallon, NV
Thanks MotoMedic. Although not what I wanted to hear, just good to know it's not just my truck. Do you think traction bars would settle the rear down any? I'm also considering putting a cap on the back (I camp a lot) and maybe that extra weight could help?