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4x4 Posi-Lok Ford

Ford F-150

Application Guide

Part No. 750
1997-2003 F-150 4WD
Find a list of local 4x4 Posi-Lok dealers or purchase online at

Common Problems With The OEM System-Vacuum Actuator

  • The colder the temperature, the longer it will take to engage.
  • If the front differential becomes submerged, the TLA temperature will cool and the 4-wheel drive will disengage.
  • The TLA unit can cause excessive wear on internal components in the differential and may cause other electrical problems.

4x4 Posi-Lok Benefits

  • 4x4 Posi-Lok reduces front differential wear and right axle breakage.
  • 4x4 Posi-Lok provides 2-wheel drive low range, giving the vehicle 4-LO torque at the rear axle with bind free steering only available in 2-HI. This feature is not available with factory systems and is beneficial when maneuvering trailers.
  • 4x4 Posi-Lok will not disengage when ignition is turned off or the differential is submerged.
  • 4x4 Posi-Lok is compatible with manual or electric transfer cases and installation can be completed in one to two hours with basic hand tools. No internal differential work is required.

Part No. 750 Includes:

  • New CNC machined brass cable housing for the central axle disconnect system
  • Dash bracket discretely locates handle to an easy to reach location.
  • Easy to follow instructions make installation easy

4x4 Posi-Lok,
Copyright 2001 4x4 Posi-Lok—Patent No. 5,605,213