The BD Diesel 1064444SM TowMaster package pairs a rebuilt 4R100 transmission with a matched BD ProForce torque converter for 1999-2003 Ford F-250 and F-350 Super Duty 4WD trucks with the 7.3L Powerstroke. The factory 4R100 was built for stock power, so added fuel and heavy trailers lead to soft shifts, slipping, heat and burned clutches. This package is built to carry that load.

BD fully rollerizes the geartrain, adds clutches to the forward, low reverse, intermediate and overdrive packs, and installs a full shift kit with a line mod valve and recalibrated accumulator body for quicker, firmer shifts. The ProForce converter uses cast aluminum stators and a stamp-forged steel cover, and the pair is dyno tested before it ships with BD's deep aluminum pan and a frame-mounted full flow filter kit. Core required, refundable deposit at checkout.

Key Features & Benefits

• Increased Clutch Count: Forward 5 (+25%), low reverse 7 (+17%), intermediate 4 (+33%) and overdrive 4 (+33%) over stock.
• Full Shift Kit: Line mod valve, recalibrated accumulator body and increased converter pressure for firm, consistent shifts.
• Durability Upgrades: Fully rollerized geartrain, machined center support, upgraded OD snap ring, reworked front pump and added lube to the OD planet and shafts.
• ProForce Converter: Torque multiplying cast aluminum stators and furnace-brazed fins for lower rpm response and less heat.
• Deep Pan and Filter: BD HD pan adds 6 quarts of fluid capacity, plus an auxiliary frame-mounted full flow filter kit.

Technical Specifications

• Manufacturer: BD Diesel Performance
• Part Number / SKU: 1064444SM
• Product Type: Transmission and torque converter package
• Transmission: Ford 4R100 4-speed, 4WD, no PTO provision
• Torque Converter: BD ProForce, street and towing
• Truck Compatibility: 1999-2003 Ford F-250 and F-350 Super Duty
• Engine Platform: 7.3L Powerstroke
• Install Time: About 7 hours
• Core Requirement: Core required, refundable deposit at checkout
• Warranty: 36 months or 150,000 miles on parts, 12 months or 24,000 miles on labor; race use not covered; remote filter required for warranty inspection

Vehicle Fitment & Technical Installation Notes

Fits 1999-2003 Ford F-250 and F-350 Super Duty 4WD trucks with the 7.3L Powerstroke and 4R100 automatic. This transmission has no PTO provision. On an Excursion, the factory style pan must be used because the BD deep pan interferes with the factory crossmember.

Installation Tip: Flush the transmission cooler and lines with a back-flow machine and oil-based cleaner before installing so debris from the old unit cannot reach the new one.