Tire pressures
Over inflated will wear the center, under inflated will wear the edges.
With the cost of comfort obviously, but comfort in the truck is not too great no matter the tire pressure.
I heard from "green forum" that one of Honda car owners put 45 psi in his wheels for fuel savings. The tires are 30 max rated.
With bigger tires that have a higher traction rating, running on less patch may not effect performance over stock tires.
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An old trick is to paint (I used white interior house paint) a stripe about 1" wide across the tires. Drive the truck straight (works best on a Sunday moring is a parking lot) braking and acclerating (an 1/8 mile usually works). At the end of the run get out and check out where the paint has been scrubbed off. In the center, too much air, on the sides, not enough air.
Usually however, never run less then 50% of the max air pressure or excess heat may result.
On my '03 F250 6.0 CC, LB 4x4 with 265/75R16 I'm running 55 psi front and 40 psi rear. Have been doing so for 30K since the tires were new and they look great, nice even tread wear. I also rotate them every 10K. I'm expecting 70K out of them with no problem. (Michelin XTL's M/S - 90% of my running is highway) Just my $0.02.
Ford Trucks for Ford Truck Enthusiasts
TSB
06-22-14 STEERING WHEEL OSCILLATION
Publication Date: October 25, 2006
FORD: 2005-2007 F-Super Duty
This article supersedes TSB 06-15-1 to update the service labor operations.
ISSUE:
Some 2005-2007 F-Super Duty vehicles may exhibit steering wheel oscillation (back and forth motion), immediately following front or rear wheel impacts (i.e. pavement joints, frost heaves, rough roads, etc.). Steering wheel motion is typically in the range of ± 5 degrees, and typically dampens out in fewer than five oscillations. This condition occurs mostly on 4X4 vehicles, and is more evident on trucks equipped with a gas engine.
ACTION:
Refer to the following Service Procedure to minimize the steering wheel oscillations on impacts, however, there may be some remaining minor oscillation which would be considered normal.
SERVICE PROCEDURE SUMMARY
Set tire pressure and road test vehicle to evaluate vehicle before proceeding with further repairs. If issue is resolved, do not proceed with the rest of this TSB
If concern still exists, check steering damper for leaks; torque steering and suspension fasteners per Workshop Manual
If concern still exists, check front alignment and reduce front caster
Replacement of redundant control steering wheel (if equipped and vehicle built prior to 10/8/2004)
VEHICLE INSPECTION - TIRE PRESSURE
Set tire pressures as indicated on the vehicle label (located on driver's door label).
NOTE: SETTING TIRE PRESSURE TO DOOR SPECIFICATION IS ONE OF THE SINGLE MOST IMPORTANT MEASURES IN RESOLVING THIS ISSUE. LOWERING TIRE PRESSURE WILL MAKE THIS ISSUE WORSE.
ROAD TEST
Ask customer what type of road surface and speed generates the steering wheel oscillation.
Road test vehicle on similar road surface and speed, to gain a feel for the customer's issue.
If no issues are identified during the road test, do not proceed with the rest of this TSB.
STEERING DAMPER INSPECTION AND STEERING/SUSPENSION FASTENER TORQUE CHECK
Wipe down and inspect the steering damper. Turn the steering wheel from lock to lock several times to cycle the steering damper and inspect for leaks.
If leaks are present, install a new steering damper.
Check torques on the following steering and suspension fasteners and adjust to specification as required (see following Table).
Torque Specification
Description Lb-ft Nm
Damper nuts (4X2) 59 80
Damper-to-bracket (F-250, F-350 4X4) 26 35
Damper-to-drag link 67 91
Drag link-to-pitman arm nut 148 201
Inner tie-rod end nuts 85 115
Outer tie-rod end nuts 85 115
Track bar bracket-to-frame nuts and bolts 129 175
Track bar-to-track bar bracket bolt 406 550
Track bar-to-axle nut 185 250
Radius arm to axle bolts 222 300
Radius arm to bracket nut 222 300
NOTE: ADJUSTING TORQUE ON STEERING AND SUSPENSION FASTENERS IS VERY IMPORTANT IN RESOLVING THIS ISSUE. FASTENERS THAT ARE IMPROPERLY TORQUED WILL MAKE THIS ISSUE WORSE.
FRONT WHEEL ALIGNMENT AND REDUCE FRONT CASTER
NOTE: OSCILLATION ISSUES RESOLVED BY WHEEL ALIGNMENT ARE WARRANTED FOR 12/12 ONLY, REGARDLESS OF OTHER STEPS PERFORMED.
Measure wheel alignment. Verify that Front Caster, Camber, and Total Toe are within specification. Adjust as required. Refer to the Workshop Manual, Section 204-00 for complete alignment specifications.
REDUCE FRONT CASTER
Note the current front caster
Use alignment adjustment bushings to reduce front caster by 0.5 to 0.75 degrees. The caster setting may be at the lower end of the specification as long as the vehicle drives smoothly. Do not put caster setting below the lower specification limit. Use alignment adjustment bushings
F-250/350 4X4:
5C3Z-3B440-CCC (0.5 degree bushing)
5C3Z-3B440-DDD (0.75 degree bushing)
5C3Z-3B440-EEE (1.0 degree bushing)
F-450/550 4X4 and 4X2:
5C3Z-3B440-HHH (0.5 degree bushing)
5C3Z-3B440-JJJ (0.75 degree bushing)
5C3Z-3B440-KKK (1.0 degree bushing)
F-250/350 4X2:
5C3Z-3B440-C (0.5 degree busing)
5C3Z-3B440-D (0.75 degree bushing)
5C3Z-3B440-E (1.0 degree bushing)
For All 4X4 and for F-450/550 4X2:
Rotate the alignment adjustment bushing so that the bushing hole is in the 45 degree forward and inboard position (See Figure 1)
Figure 1 - Article 06-22-14
This should lower the caster, while keeping the camber within the specification range. If the camber is not in the specification range than rotate the alignment adjustment bushing as needed
The final caster and camber settings must be within the specification limits
Maintain the current front camber, cross-camber and cross-caster settings as close as you possibly can
Adding weight behind the rear axle lowers the rear of the vehicle, which decreases the frame angle, which in effect increases caster
For All F-250/350 4X2:
Observe the camber position of the alignment bushing that is currently in the truck and attempt to maintain that position while moving the caster position forward in the truck
The final caster and camber settings must be within the specification limits
NOTE: CASTER SETTING IS VERY IMPORTANT IN RESOLVING THIS ISSUE. INCREASING THE CASTER SETTING WILL MAKE THIS ISSUE WORSE.
REPLACEMENT OF REDUNDANT CONTROL STEERING WHEEL - Vehicles Built Prior To 10/8/2004 Only
NOTE: THE REPLACEMENT STEERING WHEEL WILL CONTAIN THE REDUNDANT CONTROLS.
Remove driver air bag assembly. Refer to Workshop Manual, Section 211-04 for complete instructions.
Remove the steering wheel.
Install new steering wheel.
Reinstall driver air bag assembly.
Re-set clear vision as required.
NOTE: FOR ADDITIONAL INFORMATION, PLEASE REFER TO SECTION 211-04 OF THE WORKSHOP MANUAL FOR COMPLETE REMOVAL AND INSTALLATION PROCEDURES FOR THE STEERING COLUMN.
PART NUMBER PART NAME
5C7Z-3600-ABA Redundant Control Steering Wheel Assy (King Ranch Tan/Peb)
5c7z-3600-CBA Redundant Control Steering Wheel Assy (Charcoal Black)
5C3Z-3E651-D Steering Damper
5C3Z-3B440-C F-250/350 4X2 (0.5 degree bushing)
5C3Z-3B440-D F-250/350 4X2 (0.75 degree bushing)
5C3Z-3B440-E F-250/350 4X2 (1.0 degree bushing)
5C3Z-3B440-CCC F-250/350 4X4 (0.5 degree bushing)
5C3Z-3B440-DDD F-250/350 4X4 (0.75 degree bushing)
5C3Z-3B440-EEE F-250/350 4X4 (1.0 degree bushing)
5C3Z-3B440-HHH F-450/550 4X4 and 4X2 (0.5 degree bushing)
5C3Z-3B440-JJJ F-450/550 4X4 and 4X2 (0.75 degree bushing)
5C3Z-3B440-KKK F-450/550 4x4 and 4x2 (1.0 degree bushing)
NOTE: LABOR OPERATIONS IN THIS TSB CAN BE CLAIMED TOGETHER.
NOTE: OSCILLATION ISSUES RESOLVED BY WHEEL ALIGNMENT ARE WARRANTED FOR 12/12 ONLY, REGARDLESS OF OTHER STEPS PERFORMED.
WARRANTY STATUS:
Eligible Under Provisions Of New Vehicle Limited Warranty Coverage
OPERATION DESCRIPTION TIME
062214A 2005-2007 F-Super Duty: Check Tire Pressure, Road Test To Verify Repair, Concern Resolved, Return To Customer (Do Not Use With 1007D, 3001A, 3001A1, 3001A6, 3600A) 0.4 Hr.
062214B 2005-2007 F-Super Duty: Check Tire Pressure, Road Test To Verify Repair, Concern Not Resolved, Check Steering Damper Replace If Necessary, Verify Proper Torque On Steering Components, Road Test If Concern Is Resolved Return To Customer (Do Not Use With 1007D, 3001A, 3001A1, 3001A6, 3600A) 1.4 Hrs.
062214C 2005-2007 F-Super Duty 250/350 4X2 SINGLE REAR WHEEL: Check And Adjust Front Wheel Alignment, This Labor Operation Can Be Claimed With Operation B Only (Do Not Use With 1007D, 3001A, 3001A1, 3001A6, 3600A) 1.5 Hrs.
062214C 2005-2007 F-Super Duty 250/350 4X4 SINGLE REAR WHEEL: Check And Adjust Front Wheel Alignment, This Labor Operation Can Be Claimed With Operation B Only (Do Not Use With 1007D, 3001A, 3001A1, 3001A6, 3600A) 1.8 Hrs.
062214D 2005-2007 F-Super Duty 250/350 4X2 DUAL REAR WHEEL: Check And Adjust Front Wheel Alignment, This Labor Operation Can Be Claimed With Operation B Only (Do Not Use With 1007D, 3001A, 3001A1, 3001A6, 3600A) 1.9 Hrs.
062214D 2005-2007 F-Super Duty 250/350 4X4 DUAL REAR WHEEL: Check And Adjust Front Wheel Alignment, This Labor Operation Can Be Claimed With Operation B Only (Do Not Use With 1007D, 3001A, 3001A1, 3001A6, 3600A) 2.1 Hrs.
062214D 2005-2007 F-Super Duty F450/550 4X2/4X4 DUAL REAR WHEEL: Check And Adjust Front Wheel Alignment, This Labor Operation Can Be Claimed With Operation B Only (Do Not Use With 1007D, 3001A, 3001A1, 3001A6, 3600A) 2.3 Hrs.
062214E 2005-2007 F-Super Duty With Redundant Steering Control Built Prior To 10-8-2004: Replace Steering Wheel, Includes Time To Depower And Repower The Supplemental Restraints System Can Be Claimed With Operation A Or B (Do Not Use With 1007D, 3001A, 3001A1, 3001A6, 3600A) 0.7 Hr.
DEALER CODING
BASIC PART NO. CONDITION CODE
(Operation A) NPF 82
(Operation B) 3E651 42
(Operation C) FRONT W6
(Operation D) Front W6
(Operation E) 3600 42
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NOTE: The information in Technical Service Bulletins is intended for use by trained, professional technicians with the knowledge, tools, and equipment to do the job properly and safely. It informs these technicians of conditions that may occur on some vehicles, or provides information that could assist in proper vehicle service. The procedures should not be performed by "do-it-yourselfers". Do not assume that a condition described affects your car or truck. Contact a Ford, Lincoln, or Mercury dealership to determine whether the Bulletin applies to your vehicle. Warranty Policy and Extended Service Plan documentation determine Warranty and/or Extended Service Plan coverage unless stated otherwise in the TSB article. The information in this Technical Service Bulletin (TSB) was current at the time of printing. Ford Motor Company reserves the right to supercede this information with updates. The most recent information is available through Ford Motor Company's on-line technical resources.
Copyright © 2006 Ford Motor Company
For example, the door sticker on my wife's SUV states it should be run at 35 psi. But I noticed the sides were wearing faster, so I bumped 'em up to 40. It rides a tiny bit rougher but the tires are wearing properly. My truck is having an alignment issue, so I'm not counting it yet.
For example, the door sticker on my wife's SUV states it should be run at 35 psi. But I noticed the sides were wearing faster, so I bumped 'em up to 40. It rides a tiny bit rougher but the tires are wearing properly. My truck is having an alignment issue, so I'm not counting it yet.
I know, I dont ever look a the door sticker, I just run the tire pressure that gives me the performance I want, better MPG,towing,M+S, etc.











