Adapters

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Bellhousing Adapter Kits

Transfer Case Adapter Kits

Drivetrain Conversion Packages

NV4500 Adapter Packages

AX15 Adapter Packages

GM Vortec Engine Adapters (GEN III, IV & V)

OEM ADAPTERS

Adapter Plates & Castings

NV3550 Retrofit Adapter Packages

Bellhousing Index Reducers

Four-Wheel Drive Adapters

Repairing, restoring, and customizing a 4WD vehicle is always easier with the right adapters. When you’re installing components that didn’t come stock with your truck or SUV, 4WD adapter kits ensure a precise fit by connecting aftermarket upgrades to OEM parts—or linking different modifications together.

Since 1971, Advance Adapters has been producing high-quality conversion and adapter solutions designed, engineered, and manufactured in the U.S. Our off-road adapter kits are built for strength and reliability, making them an essential upgrade for anyone looking to maximize performance on and off the trail.

Explore hundreds of 4WD adapter kits built for popular vehicles including Jeep, Ford, Chevy, and other off-road models. Whether you’re tackling a major drivetrain conversion or simply enhancing your rig’s durability, Advance Adapters delivers the products you need to do the job right the first time.

Off-Road Adapter Kits

We offer 4WD adapter kits and parts for almost any DIY project. Whether you’re repairing, upgrading, or completing a full drivetrain swap, our adapter kits make it possible to connect popular components with ease. Use transmission-to-transfer case adapters and engine-to-transmission adapters to join combinations like a GM TH350 transmission with a Jeep Dana 300 transfer case.

For larger upgrades, our 4WD conversion packages include the hardware and accessories needed to install new transmissions, saving you time sourcing individual parts. We also provide retrofit kits designed for popular manual transmissions—including the AX15, NV4500, and NV3550—so you can pair them with your existing engine while making the most of your available space.

With Advance Adapters, you’ll find the right off-road adapter kits to keep your Jeep, Ford, Chevy, or other 4WD vehicle running at peak performance.

4WD Adapter Hardware

If a part has failed within your current conversion, you don’t need to replace the entire assembly. Advance Adapters offers individual hardware and accessories that let you restore your custom vehicle at a fraction of the cost. Shop spline outputs and inputs, couplers, gears, seals, and other premium components engineered for strength and reliability.

These parts not only keep your conversion running smoothly but also give you the ability to fine-tune your setup for the ideal balance of power and torque. Use our convenient search options to quickly find adapters that match your vehicle and project goals, or speak directly with one of our four-wheel drive experts for personalized guidance. Backed by exceptional customer service and decades of experience, we provide the support you need to get the most out of your 4WD conversion.

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