SKU: ADV50-6902
MPN: 50-6902
The 700R4 to NP205 Adapter Kit from ADVANCE ADAPTERS is engineered for serious off-road and vintage truck enthusiasts looking to upgrade their transmission and transfer case combination. This adapter kit enables the installation of a Turbo 350 (700R4) transmission in place of a TH400, while maintaining compatibility with the bulletproof NP205 transfer case—a combination prized by 4x4 builders for reliability and parts availability. Whether you're restoring a classic Chevy truck, building a rock-crawling rig, or modernizing an older powertrain, this kit bridges the gap between contemporary transmission technology and proven transfer case engineering.
This adapter kit handles the mechanical interface challenge created by the 700R4's different bolt pattern and shaft configuration compared to the original TH400 it replaces. ADVANCE ADAPTERS engineered this solution to maintain proper driveline angles, transfer case input shaft engagement, and structural integrity under load—critical factors when moving power from a modern overdrive transmission through a transfer case that may see heavy off-road duty. The kit accounts for length differences and coupling geometry, ensuring the transmission and transfer case mate with precision while allowing full range of motion in the transfer case shifter and maintaining proper bell housing clearance.
Mechanics and fabricators upgrading vintage Chevy, GMC, and Blazer platforms frequently specify this adapter when clients demand better highway efficiency (the 700R4's overdrive reduces cruising RPMs significantly) without sacrificing the legendary durability of an NP205 transfer case. Installation requires standard transmission removal procedures and basic mechanical skill, though professional installation is recommended to verify driveline balance and transfer case input shaft alignment. This kit is not a retrofit for vehicles originally equipped with automatic transmissions other than TH400—verify your current configuration before ordering to ensure compatibility with your specific year, make, and model platform.
WARNING ⚠️ You must be 18 or older to purchase shotgun or rifle ammunition and 21 or older to purchase handgun ammunition and firearms. Please reference our requirements for ammunition orders to "restricted" states HERE. Always make sure you use the correct ammunition for your firearms. Ammo cannot be shipped to a PO Box. Please reference state & local laws before making a firearm or ammunition purchase.
