The BD Diesel 4R100 Transmission Kit, part number 1064442FPTO, is engineered to significantly enhance the durability and performance of heavy-duty Ford trucks from 1999 to 2003. This comprehensive upgrade features a machined center support, intermediate piston, low/reverse pressure plate, and rear ring gear hub, all designed for maximum strength and reliability. The kit incorporates added lubrication circuits to the output and intermediate shafts, ensuring consistent internal lubrication for high-power applications. All aluminum planetaries are replaced with steel counterparts to withstand increased torque loads, while drilled and tapped feeds prevent leaks at the case, improving overall system integrity.
The full shift kit with line mod valve increases internal pressure, creating positive clutch engagement for quicker, more responsive shifts. Reprogrammed accumulator body and enhanced oil flow through increased cooler pressure and converter pressure optimize transmission operation under severe towing and power demands. The included BD aluminum heavy-duty transmission pan adds six quarts of extra oil capacity, reducing heat buildup and internal wear. The pan’s heat-dissipating fins and magnetic drain plug further aid in maintaining optimal operating temperatures and cleanliness.
Designed for high torque capacity, this transmission upgrade handles up to 300% more power and torque than stock, making it suitable for demanding towing, fleet, and performance applications. The kit features tighter clutch packs, 30-40% more clutch material, and additional steels, resulting in quicker, firmer shifts and enhanced drivetrain longevity. Fully rollerized geartrain, reworked front pump, upgraded supports, and stronger internals ensure long-term reliability. Each transmission is dyno-tested before installation, with OEM-style PTO compatibility and a 36-month/150,000-mile limited warranty. Note that use of third-party or OEM converters may affect warranty coverage.
This upgrade is essential for fleet operators and serious enthusiasts seeking maximum drivetrain durability and performance in heavy-duty Ford trucks. Proper installation, including replacing related components and following break-in procedures, is critical to achieving optimal results.
Features:
- Handles up to 300% more power and torque than stock for heavy-duty towing and fleet applications
- Premium internal friction materials and tighter clutch packs for quicker, firmer shifts
- Enhanced thermal capacity with upgraded oil flow and heat dissipation to prevent slippage under severe loads
- Long-term drivetrain reliability with stronger internals, reworked components, and comprehensive lubrication enhancements
Fitment:
Ford F-250 Super Duty Lariat 1999 to 2003
Ford F-250 Super Duty XL 1999 to 2003
Ford F-250 Super Duty XLT 1999 to 2003
Ford F-350 Super Duty King Ranch 2003
Ford F-350 Super Duty Lariat 1999 to 2003
Ford F-350 Super Duty XL 1999 to 2003
Ford F-350 Super Duty XLT 1999 to 2003





















