Vibration above 70mph
Thread Starter
|
Trailering
Joined: Jan 2023
Posts: 24
Likes: 0
Vibration above 70mph
Got a 1997 F350 single rear wheel 2wd. Recently replaced tires, rotors, wheel bearings, shocks, and completely new tie rods and ball joints. Got the thing aligned and balanced plenty of times recently but can't get it to stop shaking and vibrating when above 70mph.
Coasting from 80 down to 70 shakes a ton and feels like the front wheels are almost wobbling. No steering wheel shake but the i know the steering box could be better. Already tightened the little adjuster nut which helped.
Really want to be able to take it screaming down the highway but am worried too much of that vibration will break something else
Coasting from 80 down to 70 shakes a ton and feels like the front wheels are almost wobbling. No steering wheel shake but the i know the steering box could be better. Already tightened the little adjuster nut which helped.
Really want to be able to take it screaming down the highway but am worried too much of that vibration will break something else
Lead Driver
Joined: Apr 2016
Posts: 7,202
Likes: 1,340
From: Bahstun
auto or stick? auto flex plate loose or cracked? if stick do you have DMF?
sometime the vibes might feel like tires but the cab can transmit vibes
when was last time you checked carrier bearing and u joints? need to take off and move em by hand
slip yoke on drive shaft been re lubed?
sometime the vibes might feel like tires but the cab can transmit vibes
when was last time you checked carrier bearing and u joints? need to take off and move em by hand
slip yoke on drive shaft been re lubed?
Thread Starter
|
Trailering
Joined: Jan 2023
Posts: 24
Likes: 0
It's an automatic, not sure about driveshaft balance. U joints aren't new but are in good condition. Carrier bearing looks good as well. Haven't lubricated slip yoke either. Rides at stock height, but the vibration feels like its more steer-wheel centralized. Almost feels like one of the front tires is wobbling but I know they should be spinning straight and true
Differential is a 4.10 and recently been opened and cleaned and re-lubed as well
Differential is a 4.10 and recently been opened and cleaned and re-lubed as well
Lead Driver
Joined: Apr 2016
Posts: 7,202
Likes: 1,340
From: Bahstun
Trending Topics
Tuned
Joined: Jan 2020
Posts: 338
Likes: 112
From: Southern California
I had similar vibrations when switching lanes or turning at speed. I looked underneath and found that my I beam to chassis mount bolt was loose. There was 2 bolts on each side and one was loose and threads were stripped from the movement/play. Had to pull the bolt and install a new one. The vibration was on one side too. Intermittent bouncing/vibration at higher speed. Since then I have rebuilt the front end, ball joints, tie rods, I beam bushings (pain to get to), all bushings including camber and sway bar and new shocks. Only thing left is steering box and new springs which I should of done while apart. Also new u-joints, carrier and extension housing bushings.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
Thread
Thread Starter
Forum
Replies
Last Post