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