Should I Use Tow Haul Mode On The Highway?

When It Makes Sense

• Good fit: You are driving a pickup or SUV with a fully loaded trailer on a long, flat highway and need smoother downshifts and additional engine braking to keep speed under control without riding the brakes.
• Good fit: Your vehicle is equipped with a torque‑converter automatic transmission that offers a dedicated Tow/Haul mode, and you are hauling a heavy payload (e.g., construction equipment) where the transmission’s shift schedule can be optimized for torque at low speeds.

When You Should Avoid It

• Warning sign: You are traveling solo with a light‑weight vehicle and no trailer; activating Tow/Haul mode can lead to higher RPMs, reduced fuel economy, and unnecessary strain on the drivetrain.
• Warning sign: You are in stop‑and‑go traffic or navigating steep, twisting mountain roads where frequent gear changes and aggressive braking are required; using Tow/Haul mode may make the vehicle feel less responsive and increase brake wear.

Pros and Cons

Pros

• Provides firmer, lower‑gear shifts that improve engine braking, helping control speed on downhill stretches without overheating the service brakes.
• Optimizes transmission behavior for high‑torque situations, which can reduce transmission wear when regularly hauling heavy loads.

Cons

• Increases engine RPMs in normal driving, leading to higher fuel consumption and louder cabin noise.
• May cause premature wear on clutch plates or torque converter if engaged for extended periods without a load, as the transmission is forced to stay in lower gears.

Decision Checklist

• Am I towing a trailer or carrying a cargo weight that approaches my vehicle’s rated Gross Vehicle Weight Rating (GVWR) or Gross Combined Weight Rating (GCWR)?
• Will I be driving primarily on highways or long, steady‑state roads where reduced gear shifts are beneficial?
• Do I have a clear need for extra engine braking (e.g., steep grades) or is my load light enough that normal transmission settings suffice?

Alternatives to Consider

If you’re uncertain about using Tow/Haul mode, consider manually selecting a lower gear (if your transmission allows) for short downhill sections, using trailer brakes (if equipped), or simply reducing speed and relying on regular service brakes. For light‑load trips, staying in the default transmission mode preserves fuel economy and minimizes wear.

Final Recommendation

Activate Tow/Haul mode on the highway when you are carrying or pulling a substantial load and need extra engine braking or smoother low‑speed shifts. Avoid it for light‑load trips, city driving, or prolonged periods without a trailer. Always refer to your vehicle’s owner manual for specific guidelines, and consult a qualified mechanic or dealer if you are unsure whether your particular situation warrants its use.