BD DIESEL 1600411 ON/OFF LOCKUP KIT 1999–2003 FORD 7.3L POWER STROKE 4R100

Product Description

The BD DIESEL 1600411 On/Off Lockup Kit is engineered for improved torque converter control in 1999–2003 Ford 7.3L Power Stroke trucks equipped with the 4R100 automatic transmission. The factory lockup strategy can lead to suboptimal lockup under load, heat buildup, and reduced drivability. This kit provides a simple on/off lockup control harness and module to help manage torque converter behavior for better performance and reduced heat.

BD Diesel 1600411, On/Off Lockup Kit, Ford 7.3L Power Stroke 4R100, transmission lockup control, torque converter lockup kit, improved 4R100 lockup, BD Diesel lockup harness

This On/Off Lockup Kit includes a dedicated wiring harness and lockup control module designed to interface with the factory transmission harness. By providing firmer torque converter engagement and a simplified lockup control logic, it helps reduce heat and slippage during sustained load conditions like towing or highway driving. It’s a popular choice for 7.3L trucks used in heavy-duty or strenuous applications seeking improved transmission feel and reduced converter heat.

Fitment

• 1999 Ford F-250 – 7.3L Power Stroke – 4R100 Automatic
• 2000 Ford F-250 – 7.3L Power Stroke – 4R100 Automatic
• 2001 Ford F-250 – 7.3L Power Stroke – 4R100 Automatic
• 2002 Ford F-250 – 7.3L Power Stroke – 4R100 Automatic
• 2003 Ford F-250 – 7.3L Power Stroke – 4R100 Automatic
• 1999 Ford F-350 – 7.3L Power Stroke – 4R100 Automatic
• 2000 Ford F-350 – 7.3L Power Stroke – 4R100 Automatic
• 2001 Ford F-350 – 7.3L Power Stroke – 4R100 Automatic
• 2002 Ford F-350 – 7.3L Power Stroke – 4R100 Automatic
• 2003 Ford F-350 – 7.3L Power Stroke – 4R100 Automatic

Fitment Note: This kit is intended for 4R100 automatic transmissions paired with the 7.3L Power Stroke engines in Ford Super Duty trucks. Confirm transmission type before ordering.

Cross-Reference / Compatible BD DIESEL Products

• BD DIESEL 1600412 4R100 ON/OFF LOCKUP KIT WITH PROTECTX
• BD DIESEL 1062114-2 BUILD-IT FORD E4OD STAGE 4 TRANS KIT – 94–97 7.3L

FAQ

What does an On/Off Lockup Kit do?

It provides firm torque converter lockup engagement and control logic that can improve drivability and reduce heat/slippage in the transmission under load conditions.

Is this kit compatible with all 7.3L trucks?

This kit is compatible with 1999–2003 Ford F-250 and F-350 trucks equipped with the 4R100 transmission and 7.3L Power Stroke engine.

Does this affect emissions or require special tuning?

No — this On/Off Lockup Kit is a hardware logic control solution that does not affect emissions hardware or require ECM tuning.

Specifications for BD DIESEL PRODUCTS 1600411