Complete 700R4 lock-up control kit with automatic 4th-gear activation, internal harness, solenoid, filter, gasket, and optional brake switch for smoother drivability The Bowler Performance 700-R4 Lock-Up Control Module gives your transmission smooth, predictable torque converter lock-up without vacuum switches, bulky aftermarket boxes, or wiring headaches. This plug-and-play upgrade delivers better drivability, improved fuel efficiency, and longer transmission life—using a clean, integrated design built to Bowler quality standards. Converter lock-up automatically occurs 8–10 seconds after 4th gear engagement , giving the engine time to gain RPM before locking up.

The result:
stronger performance, smoother transitions, and a more controlled driving feel. Perfect for street cars, hot rods, Pro Touring builds, and restorations running a 700-R4. Key Features Automatic converter lock-up 8–10 seconds after 4th gear No vacuum switch required — works with carb, EFI, boosted, or mild-to-wild engines No bulky external boxes — GM 4-pin connector built directly into the module Epoxy-coated electronics for weather, vibration, and heat protection Simple one-wire hookup — only needs a fused 12V, 2-amp ignition feed Eliminates lock-up shudder, early bogging, and high-gear chugging Improves drivability and fuel economy Complete kit with all wiring, gaskets, and hardware Compatible with all 700-R4 transmissions What’s Included in the Kit Everything needed for a clean, reliable install: Lock-Up Control Module (integrated connector) New Internal Wiring Harness with Lock-Up Solenoid Pressure Switch Pan Gasket New Transmission Filter Brake Light Switch (dual-function)* Brake Switch Details We include a dual-function brake switch by popular demand: Normally closed circuit controls the lock-up module Normally open circuit operates brake lights Allows the driver to tap the brake to unlock the converter instantly Prevents high-gear chugging on inclines or late downshifts Not required for operation, but strongly improves driving experience Why You Need This Lock-Up Module Eliminates converter “chugging” when cruising or climbing hills Prevents early lock-up and bogging with performance cams/engines Helps maintain safe transmission temperatures Enhances fuel economy at highway speeds Cleanest, simplest 700-R4 lock-up solution on the market Installation Information Full installation instructions included and available here: 700-R4 Lock-Up Installation Instructions (PDF link on your Shopify) Instructions 700-R4 Lock-Up Installation Instructions