The BD Diesel 1064444F TowMaster is a rebuilt 4R100 automatic for 1999-2003 Ford F-250 and F-350 Super Duty 4WD trucks with the 7.3L Powerstroke. This version has no PTO provision. The factory 4R100 was built for stock power, so added fuel and heavy trailers lead to soft shifts, slipping, heat and burned clutches. This transmission adds clutch capacity and line pressure 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. Each unit is dyno tested and ships with BD's deep aluminum pan and an auxiliary frame-mounted full flow filter kit. This is the transmission only; a BD torque converter must be installed with it to keep the warranty. 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 quicker, firmer 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.
• Deep Pan: BD HD aluminum pan adds 6 quarts of fluid capacity.
• Full Flow Filter Kit: Auxiliary frame-mounted filter kit included for added protection.

Technical Specifications

• Manufacturer: BD Diesel Performance
• Part Number / SKU: 1064444F
• Product Type: Performance automatic transmission (transmission only, no converter)
• Transmission: Ford 4R100 4-speed, 4WD, no PTO provision
• Includes: Transmission, BD deep pan, auxiliary full flow filter kit
• 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; requires a BD torque converter; 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. 2WD trucks with a driveline-mounted brake assembly also use this 4WD model. 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.