B&M TH400 Shift Improver Kit — Fits TH400 / TH375 / M40 1965-1987 Transmissions

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Transform Your TH400 with B&M Shift Improver KitUnleash the full ...Read More

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Car Wheel Size Chart

Wheel Diameter (inches) Tire Width (mm) Aspect Ratio Rim Width (inches)
14185655.5
15195606.0
16205556.5
17215507.0
18225457.5
19235408.0
20245358.5

Note: Wheel and tire sizes vary by car make and model. Always consult your vehicle’s manufacturer for exact specifications.

How to Read Tire Size

Example: 225/45R17 means:

  • 225 = Tire width in mm
  • 45 = Aspect ratio (height as % of width)
  • R17 = Rim diameter in inches

Product Details

Product Description
Part Numbers
Sizing & Fit

Transform Your TH400 with B&M Shift Improver Kit

Unleash the full potential of your classic automatic transmission with the B&M TH400 Shift Improver Kit. Designed for TH400, TH375, and M40 transmissions manufactured between 1965 and 1987, this kit delivers a noticeable improvement in shift quality and performance. Say goodbye to sluggish, soft shifts and experience the crisp, firm gear changes that B&M is famous for, enhancing both street driving and track performance.

Engineered for Enhanced Performance and Durability

The B&M Shift Improver Kit is not just about firmer shifts; it's about improving the overall durability and responsiveness of your transmission. By optimizing hydraulic pressures and shift timing, this kit reduces clutch and band slippage, which is a primary cause of transmission wear and heat buildup. The result is a more efficient power transfer, quicker acceleration, and a longer lifespan for your valuable transmission.

  • Application: Automatic Transmission Shift Kit
  • Compatibility: TH400, TH375, M40 Transmissions (1965-1987)
  • Benefit: Firmer, faster, and more positive shifts
  • Enhances: Transmission durability and performance
  • Installation: Kit includes all necessary components and detailed instructions
  • Type: Shift Improver

Experience the B&M Difference

Whether you're restoring a classic muscle car, building a drag racer, or simply want a more engaging driving experience, the B&M TH400 Shift Improver Kit is an excellent investment. It provides a significant upgrade without requiring a complete transmission overhaul, making it a cost-effective solution for enthusiasts. Trust B&M's legendary expertise to bring out the best in your automatic transmission. Find this and more performance drivetrain solutions at GGCRACING.

Product Details

Product Description
Part Numbers
Sizing & Fit

Transform Your TH400 with B&M Shift Improver Kit

Unleash the full potential of your classic automatic transmission with the B&M TH400 Shift Improver Kit. Designed for TH400, TH375, and M40 transmissions manufactured between 1965 and 1987, this kit delivers a noticeable improvement in shift quality and performance. Say goodbye to sluggish, soft shifts and experience the crisp, firm gear changes that B&M is famous for, enhancing both street driving and track performance.

Engineered for Enhanced Performance and Durability

The B&M Shift Improver Kit is not just about firmer shifts; it's about improving the overall durability and responsiveness of your transmission. By optimizing hydraulic pressures and shift timing, this kit reduces clutch and band slippage, which is a primary cause of transmission wear and heat buildup. The result is a more efficient power transfer, quicker acceleration, and a longer lifespan for your valuable transmission.

  • Application: Automatic Transmission Shift Kit
  • Compatibility: TH400, TH375, M40 Transmissions (1965-1987)
  • Benefit: Firmer, faster, and more positive shifts
  • Enhances: Transmission durability and performance
  • Installation: Kit includes all necessary components and detailed instructions
  • Type: Shift Improver

Experience the B&M Difference

Whether you're restoring a classic muscle car, building a drag racer, or simply want a more engaging driving experience, the B&M TH400 Shift Improver Kit is an excellent investment. It provides a significant upgrade without requiring a complete transmission overhaul, making it a cost-effective solution for enthusiasts. Trust B&M's legendary expertise to bring out the best in your automatic transmission. Find this and more performance drivetrain solutions at GGCRACING.

Product Details

Product Description

Transform Your TH400 with B&M Shift Improver Kit

Unleash the full potential of your classic automatic transmission with the B&M TH400 Shift Improver Kit. Designed for TH400, TH375, and M40 transmissions manufactured between 1965 and 1987, this kit delivers a noticeable improvement in shift quality and performance. Say goodbye to sluggish, soft shifts and experience the crisp, firm gear changes that B&M is famous for, enhancing both street driving and track performance.

Engineered for Enhanced Performance and Durability

The B&M Shift Improver Kit is not just about firmer shifts; it's about improving the overall durability and responsiveness of your transmission. By optimizing hydraulic pressures and shift timing, this kit reduces clutch and band slippage, which is a primary cause of transmission wear and heat buildup. The result is a more efficient power transfer, quicker acceleration, and a longer lifespan for your valuable transmission.

  • Application: Automatic Transmission Shift Kit
  • Compatibility: TH400, TH375, M40 Transmissions (1965-1987)
  • Benefit: Firmer, faster, and more positive shifts
  • Enhances: Transmission durability and performance
  • Installation: Kit includes all necessary components and detailed instructions
  • Type: Shift Improver

Experience the B&M Difference

Whether you're restoring a classic muscle car, building a drag racer, or simply want a more engaging driving experience, the B&M TH400 Shift Improver Kit is an excellent investment. It provides a significant upgrade without requiring a complete transmission overhaul, making it a cost-effective solution for enthusiasts. Trust B&M's legendary expertise to bring out the best in your automatic transmission. Find this and more performance drivetrain solutions at GGCRACING.

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