Band / TH400 / 3L80 / Th375 / 3l80-hd / 4L80E / Th475 / Th425. Front Flex (1.00") / 64-up (oem# 8629531 / 8623123 / 8675578)

Front Flex Band 1.00" for TH400, 3L80, 4L80E Transmissions | Chevrolet/GM 1964+

Restore smooth, reliable shifting in your GM transmission with this front flex band, engineered to fit TH400, 3L80, and 4L80E units from 1964 and up. Manufactured by Atk, this 1.00-inch band is a direct replacement for OEM part numbers 8629531, 8623123, and 8675578. Whether you are rebuilding a classic muscle car or servicing a heavy-duty truck, this band delivers the durability and performance you expect.

Key Features

• 1.00" front flex band design for precise fit and function
• Direct replacement for OEM# 8629531, 8623123, 8675578
• Compatible with TH400, TH375, TH425, TH475, 3L80, 3L80-HD, and 4L80E transmissions
• Manufactured by Atk for consistent quality and long service life
• Ideal for rebuilds, repairs, and performance upgrades

Compatibility

This front flex band is compatible with Chevrolet/GM vehicles equipped with TH400, TH375, TH425, TH475, 3L80, 3L80-HD, and 4L80E transmissions from 1964 and later. It is not manufactured by Chevrolet/GM; the manufacturer is Atk.

Why Choose This Part?

When you need a dependable band for your GM transmission rebuild, this Atk front flex band offers the exact fit and rugged construction required for lasting performance. Don't settle for less—order now and get your transmission shifting like it should.