Mysterious Brake Lock-Up Solved: 1997 Toyota 4Runner Leak Repair

Diagnosing the Brake Lock-Up

• 💡 A 1997 Toyota 4Runner experienced rear brakes locking up unexpectedly when parked, eventually freeing up.
• 🔍 Upon inspection, the brake shoes were found to be saturated with fluid, causing them to swell and lock the brakes.
• ⚠️ The source of the fluid leak was identified as a faulty wheel cylinder, not the axle seal.

Repairing the Brake System

• 🛠️ The wheel cylinder and saturated brake shoes were replaced.
• ⚙️ As a preventative measure, the axle seal was also replaced while the axle was removed.
• 💧 The differential fluid was drained, and the differential cover gasket and magnet were cleaned and reinstalled with a new gasket.

Axle and Seal Replacement

• 🔩 The axle was removed after disconnecting the brake line and unbolting the axle housing.
• 🎛️ The ABS sensor and tone ring were noted, with the tone ring being the component the sensor reads for speed.
• 🗜️ The old axle seal was removed using a seal puller and a new seal was lubricated and driven into place.

Reassembling the Brakes

• 🔧 New brake shoes and hardware were installed, including springs and the parking brake lever.
• 🔩 The brake line was reconnected to the new wheel cylinder, taking care to avoid cross-threading.
• 🥁 New Toyota drums were installed, as the old ones had deep grooves and were deemed unsuitable for machining.

Addressing the Antenna Issue

• 📡 The automatic antenna, bent from a previous car wash incident, was replaced.
• 🔌 The process involved removing the base, operating the radio to extend the mast, and carefully pulling out the old cable.
• ✅ A new OEM antenna mast and cable were installed, and the system was tested to ensure proper operation.

Third Generation 4Runner Appreciation

• 👍 Third-generation 4Runners are highlighted as unique, dependable, and entering collector status, especially those without rust.
• 🔧 They are noted for being DIY-friendly, with available parts and a large character.
• ❓ The video ends with a question to viewers about a specific, rare color seen on the 1997 4Runner.