GM 700R4 Overdrive Conversion Packages

Upgrade your classic Chevrolet or GM vehicle with a professionally built 700R4 Overdrive Conversion Package from Twisted Torque. Whether you're replacing a worn TH350 or upgrading to enjoy the benefits of overdrive, our complete conversion packages deliver improved highway performance, lower engine RPM, quieter cruising, and increased fuel efficiency.

The 700R4 transmission has become one of the most popular automatic transmission upgrades for classic GM cars and trucks thanks to its low 3.06:1 first gear for strong acceleration and 0.70:1 overdrive fourth gear for comfortable highway driving. The result is a vehicle that's more enjoyable to drive while reducing engine wear and improving long-distance performance.

Twisted Torque offers complete 700R4 Overdrive Conversion Packages for a wide range of Chevrolet and GM applications. Every package is professionally assembled using premium components and includes everything needed to simplify your TH350 to 700R4 conversion. Whether you're building a daily driver, weekend cruiser, street machine, or high-horsepower muscle car, we have a transmission package designed for your performance goals.

Choose from our three performance levels:

• Twisted™ Street – Ideal for stock and mildly modified engines up to 450 HP.
• Twisted™ Pro – Built for performance street cars producing up to 550 HP with upgraded internal components.
• Twisted™ Punisher – Engineered for serious horsepower applications up to 650 HP using premium heavy-duty components.

Every transmission is built by experienced transmission professionals, thoroughly inspected before shipment, and backed by the quality and customer support that have made Twisted Torque a trusted name in performance automatic transmissions.

Browse our complete selection of 700R4 Overdrive Conversion Packages below to find the perfect transmission for your Chevrolet, GMC, Pontiac, Buick, or Oldsmobile project.