Personal 📍

Big Red had a stock gear ratio of 3.43 with the 35s and it was a dog both climbing up the hills and strained the brakes going down the hills. I don’t think this will be an issue with the F-350 with the 3.73 gear ratio on 33s – and the bigger 6.8L engine with 10 speeds that automatically downshift when going down long downgrades without going into tow-haul mode. I won’t use eco-mode, though honestly, I haven’t used it much after initial use as it only just makes the truck a dog on the hills, without saving much. Should be fun when I get out to hills of Schoharie County and the Finger Lakes.

Here is a comparison of the two trucks in how they’ll handle the mountains according to Google Gemini …

Acceleration Performance

2011 Chevy Silverado 1500

• Severe Mechanical Disadvantage: Upgrading to 35-inch tires on a 3.42 factory axle ratio drastically lowers the effective gear ratio (dropping it to an effective ratio of roughly 3.13). This takes the engine completely out of its optimal power band.
• Torque Deficiency: The 2011 5.3L V8 (Vortec) relies on higher RPMs to make power (326 hp / 348 lb-ft of torque). Combined with the massive rotational mass of heavy 35-inch tires, climbing hills will feel exceptionally sluggish.
• Gear Hunting: The 6-speed automatic transmission will constantly downshift and upshift (“hunt” for gears) to maintain highway speeds on hills, generating excessive transmission fluid heat.

2026 Ford F-350

• Optimized Power Transfer: Running 33-inch tires with a 3.73 axle ratio keeps the truck perfectly paired to maximize torque transfer to the ground.
• Massive Engine Output: Whether equipped with the 6.8L MiniZilla V8 gas engine, the F-350 produces vastly superior horsepower and torque compared to an older half-ton Chevy.
• Seamless Gearing: The modern 10-speed automatic transmission features tightly spaced gear ratios, allowing the truck to find and hold the perfect gear for any incline without losing momentum.

Braking and Control

2011 Chevy Silverado 1500

• Brake Fade Risk: Half-ton brakes from 2011 are not engineered to handle the leverage and increased rolling inertia of heavy 35-inch all-terrain tires.
• Downhill Strain: When descending long, steep grades, the mechanical disadvantage works against you. The brakes will have to work significantly harder, leading to rapid heat buildup and dangerous brake fade.

2026 Ford F-350

• Commercial-Grade Hardware: As a one-ton heavy-duty truck, the F-350 is equipped with massive, heavy-duty brake calipers and oversized ventilated rotors designed to stop gross vehicle weights exceeding 10,000 lbs.
• Advanced Descent Control: The F-350 utilizes advanced electronics, aggressive automated engine braking.