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Tech Tip: Ford F-150 Uneven Rear Brake Inboard/Outboard Pad Wear Fresno CA

The problem is the knuckle area on the rear of these trucks has a U-shaped shim that covers the knuckle where the disc brake pads make contact. The design of these shims is highly resistive to rust, corrosion and the build up of scale. These shims fit tightly onto the knuckle and may actually require a tap to seat them in place.
Triple A Automotive
(559) 321-7103
906 Barstow
Clovis, CA
Blackstone Brake & Auto Repair
(559) 264-7863
1558 N Effie Street%2C %23 102
Fresno, CA
Goodguys Tire Center
(559) 221-1438
4140 N Blackstone Avenue
Fresno, CA
A & J Auto Repair
(559) 222-3912
4323 N Blackstone Avenue %23 B
Fresno, CA
D & R Automotive of Fresno Inc
(559) 266-6060
901 M Street
Fresno, CA
Belmont Tire & Automotive
(559) 485-8970
1449 E Belmont Avenue
Fresno, CA
Cars
(559) 485-7296
2229 E McKinley Avenue
Fresno, CA
Brownie Muffler Service
(559) 237-2081
3316 E Ventura Avenue
Fresno, CA
Rick's Tire & Service
(559) 485-7970, 001-2004
1501 Fulton Street
Fresno, CA
Goodguys Tire Center
(559) 237-9383
2530 N Weber Avenue
Fresno, CA
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Tech Tip: Ford F-150 Uneven Rear Brake Inboard/Outboard Pad Wear

The following condition can be present in both non-rust belt states and rust belt states. It may be found noticeably earlier in rust belt areas but can occur in any driving environment where moisture is present.

The problem is the knuckle area on the rear of these trucks has a U-shaped shim that covers the knuckle where the disc brake pads make contact. The design of these shims is highly resistive to rust, corrosion and the build up of scale. These shims fit tightly onto the knuckle and may actually require a tap to seat them in place. The problem is that rust and scale will build up between the knuckle and the shim. Obviously, the rust and scale build up will occur faster if salt is also present. A slight lifting of the shim, from the knuckle, may occur because of the amount of rust and scale that forms between the shim and knuckle.

This shim lifting issue can cause a restrictive movement problem of the disc brake pad(s).

The pads must slide freely, or they will not engage as designed. They may also hang up or stay partially engaged after application if rust has lifted the shim. Recently a two-year-old F-150 was inspected. The amount of rust under the rear disc brake pad shim lifted the shim upward 0.025 of an inch. This may not seem like much movement, but since the pads lightly contact the shim, any lift of the shim may create a binding condition with a resulting uneven inner/outer pad wear problem.

An immediate question would be “why is rust present ...

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Ford F-150 Recall
from: NHTSA - Auto Recalls
1997 Ford F-150
Unique Recall ID#
24610000215099000000000
Vehicle/Equipment Year/Make/Model
1997 Ford F-150
Recalled Component Description:
Equipment: Electrical
Defect Summary:
Certain Cequent 90 Degree 7-Way Right Angle Adaptors Sold By Distributors In Tow Packages For Aftermarket Sales To Tow 5Th Wheel Rv Travel Trailers. Due To Incorrect Wiring Of The Harness, The Trailer Lights May Not Operate Properly.
Consequence Summary:
If The Trailer Lights Are Not Working Properly, A Vehicle Crash Can Occur.
Corrective Summary:
All Of The Defective Tow Packages Are Still At The Distributor Level And Have Not Been Sold To Any Consumers.
Source: NHTSA’s Office of Defects Investigation (ODI)