Performance Adapters at US Shift
Ford Small Block 5-Bolt to 6-Bolt / Modular Automatic Transmission Adapter
PerformanceAdapters.com Ford Small Block 5-Bolt (1961-64) V8 engine to Ford Small Block 6-Bolt (AODE) and Modular (4R70W & 6R80) V8 automatic transmission adapter
Kit items included:
CNC-machined Adapter Plate
Crankshaft Spacer
High-Torque Mini Starter
Inspection Cover Plate
Complete hardware set + Instructions
This premium adapter kit is specifically engineered to allow the use of modern and widely available 6-bolt Small Block Ford (SBF) and Modular transmissions with early 5-bolt SBF engines produced between 1961 and early 1964.
These early SBF engines (commonly 221, 260, and early 289 CID) featured a unique 5-bolt bellhousing pattern that is not compatible with later Ford transmission designs—until now. This kit completely overcomes that limitation, expanding your drivetrain options significantly.
Whether you're restoring a classic, building a restomod, or just looking to upgrade drivability and reliability, this adapter kit is a game-changer.
$675
6-Bolt AODE
$675
Modular 4R70W
$675
Modular 6R80
IMPORTANT: If you are planning on purchasing a US Shift controller, don't purchase a transmission adapter here. Please contact us to bundle a controller with a transmission adapter and receive a discount.
Store Policies
Shipping Cost
Shipping is calculated by Shopify at checkout. For controller kits, we ship via UPS.
Shipping Time
Due to delays in the supply chain, expect a delay of 10-14 days for control system orders to ship. An email will be sent to the address you provide during checkout with tracking information once your order ships. Please note that choosing expedited shipping does not reduce the time that it takes for us to ship your order.
Sales Tax
Sales tax will be charged for residents of South Carolina.
Return Policy
All returns must have an RA (Return Authorization) number and will be charged a 15% restocking fee. Shipping is non-refundable unless we shipped you the incorrect item. No refunds will be issued after 30 days past the ship date.
