The B&M® Shift Improver kits™ offer two distinct options for recalibrating your 1965-1987 GM TH400, TH375, and TH475 automatic transmissions. The first option is the HEAVY DUTY setup, ensuring firm positive shifts without sacrificing driver comfort, enhancing performance in all street vehicles. This is an excellent choice for those engaged in performance street driving or towing. The second option is our STREET/STRIP setup. Be prepared for firm positive shifts that are distinctly perceptible, capable of effortlessly chirping the tires during more assertive shifts. This setting is recommended for high-performance street/strip applications or competitive events when you demand the most robust and quickest shifts achievable from a shift improver kit.
Features:
- Ideal for Towing or Street/Strip Use
- Eliminates Soft and Sluggish Shifts
- Recalibrates Stock Transmissions
- Over 65 Years of B&M Quality
- Eliminates Shift Overlap
- Provides Crisp Shifts
- Local Pickup Available:
- No
- Local Delivery Available:
- No
- Additional Handling:
- No
