Skid Plates

What skid plates protect

The parts most exposed on a trail are rarely the strongest. Skid plates shield the components that cost the most to replace or that leave you stranded when damaged. Common targets include the oil pan, transmission, transfer case, fuel tank, differential covers, steering box and the axle ends of lower control arms. Some plates are single-purpose, while others bolt together as a full underbody set.

Steel, aluminum or stainless

• Steel is strong, repairable and usually the most affordable, though heavy and prone to rust if the coating is scratched.
• Aluminum weighs much less, which helps unsprung weight and handling, but gouges more easily and is harder to weld in the field.
• Stainless resists corrosion and slides over rock well but is generally priced higher.

Plate thickness matters. A thicker gauge resists denting but adds weight, so match the thickness to the terrain. Rock crawling calls for more protection than forest roads.

Design points to compare

• Coverage: does it protect the part and its surrounding mounts and linkages?
• Mounting: bolt-on plates use existing holes, and some require drilling or welding.
• Shape: sloped, smooth bottoms let rocks slide; flat ones can catch.
• Access: drain plugs, fill ports and filter access should remain usable.
• Finish: powder coat, bare or stainless.

Fitment and clearance

Skid plates are vehicle-specific. Differences in model year, engine, transfer case or wheelbase change the mounting points, so confirm fitment for your exact year, make, model and drivetrain. Note whether the part is for the front or rear, two-door or four-door versions, or a specific component like a control arm skid. Plates add thickness underneath, so check that they do not lower ground clearance more than expected.

Installation notes

Most bolt-on plates install with hand tools and a jack or lift. Use thread locker where the instructions call for it and torque bolts to the specified values. Recheck bolts after the first trail run, because vibration and impacts can loosen them. Heavy plates are awkward to hold overhead, so a transmission jack or a helper makes the job safer.

Maintenance and mistakes to avoid

After each trail outing, inspect plates for bent edges, cracked welds and sheared bolts. A dented plate that now touches the component it protects can transmit impacts into it, so straighten or replace it. Rinse mud from around the mounts, because trapped dirt holds moisture against the frame and speeds up rust.

• Do not tighten bolts beyond the instructions, as stripped threads in frame brackets are hard to repair.
• Do not block airflow to a transmission or transfer case in hot climates. Some designs include vents or open sections for that reason.
• Skid plates are not a substitute for recovery points or sound driving. Pick a line that avoids hard strikes whenever you can.
• Check your drain plug access before buying, since a plate that needs removal for every oil change becomes a chore.

Pairs of components are often protected together. For example, many owners pair a transfer case plate with rock sliders and control arm skids so one hit does not undo the other protection.