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Four-Wheel Drive Adapters

Repairing, restoring and customizing a 4WD vehicle is always easier with the right adapters. If you’re using components that didn’t come stock with a truck or SUV, adapters are necessary to connect them to the OEM parts — or other aftermarket upgrades. Since 1971, Advance Adapters has been developing quality conversion products made in the U.S. Shop hundreds of 4WD adapters for Jeeps, Fords, Chevys and other popular off-road vehicles.

Off-Road Adapter Kits

We offer 4WD adapter kits and parts for almost any DIYU project. Use transmission-to-transfer case adapters and engine-to-transmission adapters to mate a variety of popular components, such as connecting a GM TH350 transmission to a Jeep Dana 300 transfer case. Our team has also put together 4WD conversion packages that include the hardware and accessories needed to install new transmissions. With retrofit kits, you can add an AX15, NV4500, NV3550 and other transmissions to your existing engine while utilizing the available space.

4WD Adapter Hardware

If a part has failed within your current conversion, you don’t need to replace the entire assembly. Individual hardware and accessories are available to fix your custom vehicle at a fraction of the price. Shop spline outputs and inputs, couplers, gears, seals and other components made of premium materials. Some of these parts also can be used to r fine-tune your setup for the right amount of power and torque. Use the search options to find adapters that fit your goals or call to speed with a four-wheel drive expert. We provide leading customer service to support our leading conversion products.

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436 products found.

4L60E HEX PATTERN/NP231 21T UP GRADING TO A 87-95 23 SPL.

1997 to current GM 4L60E / 4L65E 4 speed automatic transmission to the Jeep NP231 transfer case with 21 spline input shaft, adapter kit.
SKU: 50-0431

Starting at $54/mo with . Check your purchasing power

$588.52
excluding shipping

SM465 X TOYOTA L/C 10 SPLINE

GM SM465 4 speed, 4wd manual transmission to the 1964-73 Land Cruiser 10 spline transfer case, adapter kit.
SKU: 50-4601

Starting at $51/mo with . Check your purchasing power

$559.82
excluding shipping

KIT- TH350 TO JEEP DANA 300

GM 2WD TH350 to Jeep Dana 300 Adapter Kit
SKU: 50-6300

Starting at $60/mo with . Check your purchasing power

$655.20
excluding shipping

C4 X JEEP DANA 300 23 SPLINE

Ford C4 to Dana 300 / NP231 Adapter Kit
SKU: 50-8100

Starting at $53/mo with . Check your purchasing power

$578.21
excluding shipping

DODGE H/D 29SPL/TOY L.C.19SPL

Dodge NV4500 4WD with 29 spline output shaft to the 1980-89 Landcruiser 19 spline transfer case,adapter kit.
SKU: 50-0224

Starting at $64/mo with . Check your purchasing power

$709.06
excluding shipping

700R-4 X TOYOTA L/C-16 SPLINE

GM 700R4 / 4L60 to Toyota Land Cruiser 16 spline Adapter Kit
SKU: 50-8902

Starting at $66/mo with . Check your purchasing power

$724.50
excluding shipping

TH350 X TOYOTA 4WD TRK

GM 2wd Th350 to Toyota truck 21 spline Adapter Kit
SKU: 50-5700

Starting at $60/mo with . Check your purchasing power

$661.50
excluding shipping

ADAPTER- DODGE NV4500, CAST IRON

ADAPTER- STOCK NV4500 DODGE CAST IRON
SKU: 51-0205A

Starting at $14/mo with . Check your purchasing power

$148.80
excluding shipping

TOY.L/C.16SP/GM V8 KIT(GM NV)

Adapts GM 32 Spline NV4500 to Chevy V8 small block & Toyota Land Cruiser 1974 - July 1980 16 spline Transfer Case.
SKU: 27-0021G

Starting at $111/mo with . Check your purchasing power

$1,222.77
excluding shipping

ALLISON 1000 (GM) 29 SPL. TO FORD NP205

50-9422 - ALLISON 1000 Automatic Transmission to FORD NP205 Transfer Case Adapter
SKU: 50-9422

Starting at $54/mo with . Check your purchasing power

$589.00
excluding shipping

GM SM465 2WD/JEEP 23T NP231 TC

GM SM465 2WD transmission to Jeep NP231
SKU: 50-9812

Starting at $52/mo with . Check your purchasing power

$574.69
excluding shipping

JEEP T18 TO DANA 20 T/C LG

Jeep T18 to Dana 18/20 Adapter Kit (large index cases)
SKU: 50-8705

Starting at $48/mo with . Check your purchasing power

$529.96
excluding shipping
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