82-93 TH700/R4 Shift Imp

The 82-93 TH700/R4 Shift Improver Kit from B and M Automotive is a direct-bolt upgrade designed to sharpen shift response and eliminate hesitation in the legendary TH700-R4 three-speed automatic transmission. Whether you're running a carbureted small-block or fuel-injected platform from the 1980s through early 1990s, this shift improvement kit addresses a common complaint among enthusiasts: sluggish throttle transitions and delayed power delivery during acceleration. If you've felt a noticeable lag between flooring the pedal and actual transmission engagement, this B and M solution delivers measurable improvement in drivability and feel.

This shift improver works by recalibrating the transmission's shift pressure curve and throttle valve relationship, reducing the time required for the transmission to transition between gears. The kit modifies internal hydraulic logic, allowing quicker response to throttle input without compromising reliability or transmission longevity. At just 0.76 pounds and designed to fit within the compact dimensions of TH700-R4 transmission cases, the components integrate seamlessly into stock or lightly modified transmissions. The engineering behind B and M's approach ensures that shift firmness increases proportionally with throttle application, delivering crisp 1-2 and 2-3 transitions while maintaining smooth, controlled engagement during light driving.

This upgrade is essential for vehicle owners who've installed performance cam profiles, fuel injection conversions, or increased displacement modifications and want their transmission to keep pace with engine improvements. Installation requires basic transmission disassembly knowledge or professional service, making it a cost-effective alternative to complete transmission replacement or expensive custom tuning. TH700-R4 equipped Chevrolet, GMC, and other GM platforms from 1982–1993 will see immediate gains in responsiveness and driving satisfaction, particularly in stop-and-go traffic and spirited acceleration runs.