If you're tired of your 4-wheel drive failing, get the only system that puts you in control of your front axle engagement system! 4x4 Posi-Lok is the patented cable activated engagement device designed to replace the failure prone OEM (Original Equipment Manufacturer) vacuum and electric front axle engagement systems. 4x4 Posi-Lok is not a posi-trac or locker. 4x4 Posi-Lok is simple and easy to install and allows you to engage your front axle from inside the cab. After engaging the transfer case, a one-inch pull of the 4x4 Posi-Lok cable ensures the front axles are connected. This system puts the driver in direct control of the 4-wheel drive front axle engagement.

The Posi-Lok Advantage

4x4 Posi-Lok Advantages
PSL900 for Jeep Shown Above
OEM Vacuum Actuator Disadvantages
Jeep, Dodge and S-Series
OEM Thermal Linear Actuator Disadvantages
Chevy/GMC K-Series

Works like hubs with full control from inside the cab without stopping and reduces front differential wear and right axle breakage.

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.

Will not disengage when ignition is turned off or the differential is submerged.

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.

The OEM unit is vacuum controlled. This vacuum system is prone to failure due to frozen diaphram, loss of vacuum, hard or cracked vacuum hoses, or complete loss of vacuum lines.

The OEM unit has demonstrated a high rate of failure, is non-repairable and may cause other problems.

The OEM unit can cause excessive wear on the differential and/or right axle and shift fork breakage due to incomplete engagement or disengagement.

A temperature activated plunger (Thermal Linear Actuator-TLA) connects power from the left front axle to the right front axle after the transfer case is engaged.

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 is electronically controlled and may disengage when the engine is turned off.

The TLA unit can cause excessive wear on internal components in the differential and may cause other electrical problems.

 

Chevrolet/GMC

1500-3500 Pickup 6 & 8-Lug
Suburban, Tahoe and Yukon
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Part No. PSL 600
Call for pricing
With Thermal Linear Actuator (TLA)
1988-1998 1500 & 2500 6-Lug
1992-1998 Suburban, Tahoe & Yukon 6-Lug

Part No. PSL 800
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With Thermal Linear Actuator (TLA)
1988-1998 2500 & 3500 8-Lug
1992-1998 Suburban 8-Lug

Part No. PSL 1000
Call for pricing
Any of the above vehicles.
The Perm-Lok permanently engages the Central Axle Disconnect (CAD) system and couples both front axles. Once installed, the front axles will not pull until the transfer case is engaged. This application is ideal for fleet operators or emergency vehicles. Installation is easy and can be completed in approximately 10 minutes.

S-Series
S-10 and S-15 Pickups, Blazers and Jimmys
Includes ZR2 and Highrider

Part No. PSL500
Call for pricing
1983-2003 S-10/15 Sonoma Pickup, Blazer & Jimmy
(Includes ZR2 and Highrider) With Vacuum Actuator

 

Dodge

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Part No. PSL 400
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1994-2001 Ram 1500-3500 w/ Dana 44-60
Note: With Central Axle Disconnect (CAD)

Part No. PSL 450
Call for pricing
1985-1993 Dodge W-Series Pickup, Ramcharger, Trailduster

Part No. PSL 1100
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The Perm-Lok permanently engages the Central Axle Disconnect (CAD) system and couples both front axles permanently. Once installed, the front axles will not pull until the transfer case in engaged. This is ideal for off-road vehicles or vehicles that never see the road. Installation is easy and can be completed in about 30 min. The kit includes:
  1. New cast aluminum housing with gasket kit.
  2. New machined inner push rod to lock the central axle disconnect in an engaged position.
1994-2001 Ram 1500 w/ Dana 44-60
1994-2002 Ram 2500, 3500 w/ Dana 44-60
1985-1993 W-Series Pickup, Ramcharger, Trailduster
Note: With Dana 30 Axle Central Axle Disconnect (CAD)

 

Jeep

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Part No. PSL 900
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1987-95 Wrangler YJ
1984-91 Cherokee XJ
1986-91 Comanche MJ
Note: With Dana 30 Axle Central Axle Disconnect (CAD)

Part No. PSL 920
(lifted applications over 3")
Call for pricing
1987-95 Wrangler YJ
1984-91 Cherokee XJ
1986-91 Comanche MJ
Note: With Dana 30 Axle Central Axle Disconnect (CAD)

Part No. PSL 100
Call for pricing
This heavy-duty, cast iron fork with pads replaces the old, worn out aluminum fork and pads on Jeep applications.
1987-95 Wrangler YJ
1984-91 Cherokee XJ
1986-91 Comanche MJ
Note: With Dana 30 Axle Central Axle Disconnect (CAD)

Part No. PSL 1100
Call for pricing
The Perm-Lok permanently engages the Central Axle Disconnect (CAD) system and couples both front axles permanently. Once installed, the front axles will not pull until the transfer case in engaged. This is ideal for off-road vehicles or vehicles that never see the road. Installation is easy and can be completed in about 30 min. The kit includes:
  1. New cast aluminum housing with gasket kit.
  2. New machined inner push rod to lock the central axle disconnect in an engaged position.
1987-95 Wrangler YJ
1984-91 Cherokee XJ
1986-91 Comanche MJ
Note: With Dana 30 Axle Central Axle Disconnect (CAD)

 

Ford

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Part No. PSL 750
Call for pricing
1997 - 2003 Ford F150