1. Brake Drums/Rotors Rust and Corrosion:
* Problem: Rust and corrosion on the brake drum (if rear drums) or rotor (if disc brakes in the front) surfaces create uneven friction, leading to grabbing and sticking when wet. Water gets into the microscopic pits and pores of the rusted metal, further exacerbating the effect.
* Solution: This is the most likely culprit. You'll need to have the drums/rotors machined (turned) to remove the rust and imperfections. If they're too worn, replacement is necessary. While you're at it, replace the brake shoes or pads at the same time for best results.
2. Leaking Wheel Cylinders (Rear Drums):
* Problem: If you have rear drum brakes, leaking wheel cylinders can allow brake fluid to seep onto the brake shoes. This fluid attracts and retains moisture, making the problem worse.
* Solution: Inspect the wheel cylinders for leaks. Replace any leaking cylinders and ensure the brake shoes are properly adjusted. A thorough brake fluid flush might also be needed.
3. Leaking Caliper Pistons (Front Discs):
* Problem: Similar to leaking wheel cylinders, leaking caliper pistons on front disc brakes allow brake fluid to contaminate the brake pads, leading to sticking and grabbing when wet.
* Solution: Inspect the caliper pistons for leaks and damage. Replace any leaking or damaged calipers. A thorough brake fluid flush might also be needed.
4. Brake Lines and Hoses:
* Problem: While less likely to be the *direct* cause of wet brakes grabbing, corroded or damaged brake lines/hoses can introduce moisture into the brake system, contributing to the overall problem.
* Solution: Inspect all brake lines and hoses for damage, corrosion, or leaks. Replace any that are questionable.
5. Brake System Contamination:
* Problem: Moisture or other contaminants (e.g., dirt, air) in the brake fluid can compromise its effectiveness and contribute to brake sticking.
* Solution: A complete brake fluid flush and bleed is recommended. Make sure to use fresh, DOT 3 brake fluid (or the type specified for your Ranger in your owner's manual).
What to do:
1. Safety First: Don't drive the truck until this is fixed. Wet brakes are a serious safety hazard.
2. Visual Inspection: Start with a thorough visual inspection of the brake system. Look for any obvious leaks, corrosion, or damage to the drums/rotors, calipers, wheel cylinders, brake lines, and hoses.
3. Professional Help: Unless you're experienced with brake repair, it's strongly recommended to take your 1996 Ranger to a qualified mechanic. Brake work is critical for safety, and an incorrect repair could be dangerous. They have the tools and expertise to properly diagnose and fix the problem.
Don't underestimate the importance of fixing this issue. Wet brakes are dangerous and could lead to an accident. Get it checked out by a professional as soon as possible.
