Specifications:

  • 2 wire plug with round pin terminals
  • Mounts INTO front axle housing
  • Durable construction shift actuator
  • Direct bolt in replacement
  • Built to strict quality control standards
  • Improved gas filled heating element type activation

Installation

The 4 wheel Drive Actuator actually installs quite easily. Locate it on the front axle. Unplug it. Use a large adjustable or correct size wrench and remove the actuator. Reverse to install a new one.

How this four wheel drive actuator works

When you press the button in your vehicle an electrical current passes through the actuator. The actuator is filled with a gas. This gas expands when heated. The electrical current heats the gas the gas builds pressure and forces the plunger out which engages the front axle.

The Problem

There are a number of things that can go wrong to cause you not to be able to engage four wheel drive. Age, damage, and lack of consistent use are the most common reasons for these actuators to go bad. These actuators work in an unfriendly environment. Underneath the car attached to the drivetrain, they are subject to extreme temperature change as well as physical damage from dirt, debris, rocks, etc. The gas inside the actuator can leak out over time and/or from a fracture caused by road debris. There is a mechanical mechanism that can start to stick as time goes on. Sometimes these actuator just plain don't work in extreme cold weather as the gas actually does not get hot enough to expand. Many times these actuators are not used for 9-10 months or more during warm weather. A little moisture penetrating can quickly cause a malfunction. Any one, or combination of these can result in your 4WD system not engaging or not staying engaged.

Diagnosis

A VERY telling symptom that this particular part is your problem is if your 4WD engages when the weather is warm but either does not engage or takes a lot longer to engage when the weather is colder. On most vehicles you push a button for 4WD and an indicator light blinks until the actuator engages. While the light is blinking the electric current is heating the gasses. If you light continues to blink but does not engage or takes a long time to engage (more than 10 seconds) then this actuator is the problem.
Our manufacturer changed the mixture of gas in this new actuator so it is more sensitive at lower temperatures. This has solved the cold temperature problem. We suggest engaging your four wheel drive periodically even during good weather just to "work out" the part and make sure it does not stick.

WARNING:  This product can expose you to chemicals including Lead and Lead Compounds, which are known to the State of California to cause cancer, and birth defects or other reproductive harm.  For more information, go to www.P65Warnings.ca.gov.

Lifetime Warranty

This item is backed by a Limited Lifetime Warranty. In the event this item should fail due to manufacturing defects during intended use, we will exchange the part free of charge (excludes shipping charges) for the original purchaser.

  1. step : Removing the Four Wheel Drive Actuator (0:39)
    • Pull the four wheel drive actuator wiring harness of its bracket
    • Disconnect the wiring harness
    • Pull the wire out of its bracket
    • Twist the actuator loose with an adjustable wrench
    • Twist the actuator out by hand
  2. step : Installing the New Four Wheel Drive Actuator (1:11)
    • Twist in the new actuator by hand
    • Tighten the actuator with the adjustable wrench
    • Clip the wire back into its bracket
    • Reconnect the actuator wiring harness
    • Clip the harness back into its bracket

Tools needed for replacement:

    Pliers, Cutters & misc Wrenches

  • Adjustable Wrench

5.0 / 5.0
10 Reviews
5 Stars
4 Stars
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1 Star
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Fixed my 4 Wheel Drive
A1 Auto shipped out the part quickly and I had no problem installing the actuator after watching the A1 Auto video. Great replacement part!
August 14, 2018
Purchased
3 weeks ago
Quickly shipped, perfect fit - easy install.
I ordered this part and had it 2 days later. It was a perfect fit. It was very easy to install using the online video. It took about ten minutes to remove the old one and install the new one. Fired up the truck and it engaged the 4 wheel drive instantly. Problem solved. 1A Auto is the best. I get all my parts from them!!!
January 21, 2018
Purchased
7 months ago
What is important, it works! It has my 4wd working again in time for winter. Everything I have bought from 1aauto has been very satisfactory.
December 25, 2017
Purchased
8 months ago
Fast delivery, Perfect fit and connection.
Unit took about 2 minutes from the time opening the package til complete.
November 7, 2017
Purchased
10 months ago
As usual service and parts outstanding
The instructional video made repairing my 4x4 a snap. The part was an exact fit and now all four wheels can get me out of trouble (sometimes all four get me in trouble).
August 13, 2017
Purchased
1 year ago
Right on !
Right on price , right on shipping , right on time. Excellent value and works very well. Thank you .
August 1, 2017
Purchased
1 year ago
Easy as pie
Removed old part and installed new part in less than one minute. Took longer to crawl under the truck.
July 18, 2017
Purchased
1 year ago
4 Wheeling it!
Fast shipping, Very reasonable price. Write application for my vehicle. Very Happy to be 4 wheeling again ! Thank You
June 19, 2017
Purchased
1 year ago
4 wheel drive actuator
Exact fit, unit works great and back in business! Easy install with great instructions.
January 22, 2017
Purchased
1 year ago
I am very pleased with the overall purchasing experience with 1A Auto. My payment was processed immediately and accurately, and I received the part 7 days after I ordered it, which is really commendable because it had to be shipped to Canada and cross the border. I received the part, and installation was pretty easy. The only snag I ran into was that the 2 terminal connector had the wrong terminal and would not fit into my factory wiring harness. All it took though, was to take my old harness and wire it to the new shift actuator. Even with that snag, I would still rate it overall as excellent. The part is fully operational and my 4x4 is back in perfect working order. Thanks 1A Auto
January 25, 2010
Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 2 questions Browse 2 questions and 4 answers
My 95 Silverado has a floor shifter for the 4x4 could this still be an issue or are the 4x4 actuator's only needed for the truck with a push button shifter?
Spencer B on Mar 19, 2018
BEST ANSWER: The actuator is wired by the way of the floor shifter. I want to recommend the ALL ELECTRIC actuator (comes as a kit with instructions) it is an upgrade from the gas type. I had 2 of the gas type go out before I upgraded mine to the all electric actuator. A little extra work to install the extra wire but well worth the effort.
I bought mine from 1A Auto and never a problem sense. My truck is a 93 Silverado 4x4,
Replaced the actuator but still no 4 wheel drive?
Reggie on Jan 8, 2017
BEST ANSWER: We are unable to diagnose your problem, because there could be multiple reasons why you're experiencing this particular difficulty. We suggest you take your vehicle to a reputable shop close to you to identify the problem. Once you know the cause of your problem please feel free to call us toll free at 888-844-3393. We'll be happy to see if we carry the parts needed for the repair.

Vehicle Fit

Year Make Model Description
1992-1994Chevy Blazer Full Size Chevy Blazer Full Size 4 Wheel Drive Front Axle Shift Actuator
1988-1995Chevy K1500 Truck Chevy K1500 Truck Front Axle Shift Actuator
1996Chevy K1500 Truck Chevy K1500 Truck Front with 2 Pin Style Connector Axle Shift Actuator (Built Before 1/96 Production Date)
1988-1995Chevy K2500 Truck Chevy K2500 Truck Front Axle Shift Actuator
1996Chevy K2500 Truck Chevy K2500 Truck Front with 2 Pin Style Connector Axle Shift Actuator (Built Before 1/96 Production Date)
1988-1995Chevy K3500 Truck Chevy K3500 Truck Front Axle Shift Actuator
1996Chevy K3500 Truck Chevy K3500 Truck Front with 2 Pin Style Connector Axle Shift Actuator (Built Before 1/96 Production Date)
1992-1995Chevy Suburban K1500 Chevy Suburban K1500 Front Axle Shift Actuator
1996Chevy Suburban K1500 Chevy Suburban K1500 Front with 2 Pin Style Connector Axle Shift Actuator (Built Before 1/96 Production Date)
1992-1995Chevy Suburban K2500 Chevy Suburban K2500 Front Axle Shift Actuator
1996Chevy Suburban K2500 Chevy Suburban K2500 Front with 2 Pin Style Connector Axle Shift Actuator (Built Before 1/96 Production Date)
1995Chevy Tahoe Chevy Tahoe 4 Wheel Drive Front Axle Shift Actuator
1996Chevy Tahoe Chevy Tahoe 4 Wheel Drive Front with 2 Pin Style Connector Axle Shift Actuator (Built Before 1/96 Production Date)
1988-1995GMC K1500 Truck GMC K1500 Truck Front Axle Shift Actuator
1996GMC K1500 Truck GMC K1500 Truck Front with 2 Pin Style Connector Axle Shift Actuator (Built Before 1/96 Production Date)
1988-1995GMC K2500 Truck GMC K2500 Truck Front Axle Shift Actuator
1996GMC K2500 Truck GMC K2500 Truck Front with 2 Pin Style Connector Axle Shift Actuator (Built Before 1/96 Production Date)
1988-1995GMC K3500 Truck GMC K3500 Truck Front Axle Shift Actuator
1996GMC K3500 Truck GMC K3500 Truck Front with 2 Pin Style Connector Axle Shift Actuator (Built Before 1/96 Production Date)
1992-1995GMC Suburban K1500 GMC Suburban K1500 Front Axle Shift Actuator
1996GMC Suburban K1500 GMC Suburban K1500 Front with 2 Pin Style Connector Axle Shift Actuator (Built Before 1/96 Production Date)
1992-1995GMC Suburban K2500 GMC Suburban K2500 Front Axle Shift Actuator
1996GMC Suburban K2500 GMC Suburban K2500 Front with 2 Pin Style Connector Axle Shift Actuator (Built Before 1/96 Production Date)
1992-1995GMC Yukon GMC Yukon 4 Wheel Drive Front Axle Shift Actuator
1996GMC Yukon GMC Yukon 4 Wheel Drive Front with 2 Pin Style Connector Axle Shift Actuator (Built Before 1/96 Production Date)

This part replaces:

  • Dorman 600-100
  • OE # 26013495
  • Standard Motor Products TCA1T
Part #: 1AFWA00001


Order must be placed by 4pm ET

Get it in: 2 - 4 Business Days

Want it sooner? Choose Next Day Air at Checkout

How-to Video:

(02:23 min)