Front end vibrations at various speeds and while turning.

Brit's Bronco · Jun 11, 2017

I've got 90 ford bronco xlt. I rotated my tires recently and torqued them down to specification. Ever since then I've had a vibration while turning left and right in somewhat sharp curves. Now it's gotten louder when just driving in a straight line at speeds between 10 and 60 mph. Had the front wheel bearing replaced 2 years back. Wheels didn't have any play in them when I checked them, during rotating the tires. I will be replacing the brake pads and rotors soon. Just figure I'd get some advice on places to look. Any response appreciated!

-Brit.

miesk5 · Jun 12, 2017

Yo Brit,

Welcome!

Are all four tires the same brand, model, size and wear pattern?

If they are; some possible vibration perpetrators;

Tires/wheels. Any wheel balance weights missing?

Loose or misadjusted wheel bearings. Spin tires by hand to check for wheel bearing roughness. Check wheel bearing end play.

Wheel Bearings, Front

Raise the vehicle until the tire clears the floor.

Grasp each front tire at the top and bottom and push the wheel (1007) inward and outward while lifting the weight of the tire off the front wheel bearings.

Make sure the wheel rotates freely and the brake pads are retracted sufficiently to allow movement of the wheel assembly.

If the wheel/hub-rotor is loose on the front wheel spindle (3105) or does not rotate freely, adjust the front wheel bearings

Brake rotors/drums — brake imbalance.

Suspension/steering linkage.

...

Noise or Vibration, 4-Wheel Drive Vehicles

Verify the condition by road testing.

For 4-wheel drive vehicles, verify concern with known quality conventional tires. If symptom still exists, perform the following:

Shift transfer case into two-wheel drive.

Unlock front hub locks (or remove front driveshaft (4602)).

If condition disappears, concern is in front axle or driveshaft.

If condition persists, remove rear driveshaft and road test using front drive.

If condition disappears, concern is in rear driveline or axle.

If condition persists, refer to Symptom Charts in the Diagnosis and Testing portion of this section or other sources.

Above is from 96 Bronco-F-Series Workshop Manual (PARTIAL) by FORD via

http://www.diesel-da...stj/stjleft.htm

96 is same as most earlier years especially 92-96, except for:
92 through 95 uses the Electronic Engine Control, version Four (EEC-IV, aka On Board Diagnostics (OBD-I)) engine management computer
96 uses the OBD-II (EEC-V) engine management computer;
4WABS (93-96);
RABS (87-92);
Air Bag (94-96);
3 ***** Automatic Locking Hubs (Built from May 95 through 96); Spark Plug Wire Routing & Firing Order (The firing order for 1987-1993 5.0Ls is 1-5-4-2-6-3-7-8. The firing order for 1994- 96 5.0Ls & all 5.8Ls is 1-3-7-2-6-5-4-8.);
R134a in 94-96;
2-piece Spindle Rolling Diaphragm Seal (RDS) used on 5/95 to 96 Broncos & F Series 1/2-ton 4WD;
Mass Air Flow in 95 5.8 California models and in all 96s, other years used Manifold Absolute Pressure Sensor (MAP).
96 5.8 do not have the Air Injection (AIR), Secondary Air Injection; Pump (Smog Pump), Thermactor Air Bypass (TAB) & Thermactor Air Diverter (TAD) Solenoids; Diverter, Check & Bypass Valves, Cross-Over Tube, etc. But 96 5.0 does have the system.
The 96, Vapor Management Valve (VMV) replaces the canister purge valve (CanP valve) used in EEC IV. But manual still shows CanP valve probably because it was a late addition to the 96 production line.
The Speed Control Deactivation Switch (SCDS) in a 93 Bronco is located on the driver side frame rail, but in 94 through 96 it is on the master cylinder.
Still researching other differences.

Next time, please fill out your Signature with year, engine size, transmission type, transfer case type (manual or electric shift), locking hub type (automatic or manual) info & major mods such as a Lift, etc. for better responses.

Click your name in right black panel in upper right;
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Click, My Profile
Click, Edit My Profile in right side black panel
In left panel, Click, Edit Signature
Enter info
Click, Save Changes
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Keep each post limited to one issue.
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Our sponsor, Jeff at the Bronco Graveyard has offered a 2% discount to members of The BroncoZone for on line orders. To get your discount, enter the discount code BZMEMBER. Also you must include your BroncoZone User Name with the order.
http://broncograveyard.com

Here are some wiring diagrams (partial, 86 through 96) and Technical Service Bulletins, (80 through 96) @ http://www.revbase.com/BBBMotor/Wd

GL!

Al

Front end vibrations at various speeds and while turning.

Brit's Bronco

New member

miesk5

96 Bronco 5.0

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