TH400/TH350/700R4 Transmission Shift Improver Kit by B&M®
Choose Heavy Duty or Street/Strip calibration with the kit matched to your transmission.
This B&M® Shift Improver Kit changes the internal automatic-transmission calibration for firmer, more positive shifts; it does not rebuild the floor shifter. Select the version for 1965-87 TH400, 1968-81 TH350 or 1982-93 700R4/4L60. Each provides Heavy Duty and Street/Strip calibration choices. The TH350 kit excludes the lockup TH350C, and the 700R4/4L60 kit does not fit electronic 4L60E transmissions. The 700R4/4L60 version reuses the original separator plate. Follow the instructions for the exact transmission and chosen calibration.
• 1965-87 TH400; 1968-81 TH350; 1982-93 700R4/4L60 options
• Heavy Duty or Street/Strip calibration
• Internal transmission shift-calibration kit
• TH350C lockup and electronic 4L60E excluded
• 700R4/4L60 version reuses original separator plate
Notes
- This item is not eligible for any further discounts or promotional pricing.
WARNING: This product can expose you to chemicals including lead, sulfur, nickel, chromium, vanadium, titanium, polyvinyl chloride, and 4,4’-methylenebis (2-chloroaniline), which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
