Why is my 4WD still not engaging after changing actuator?

If you put it in 4 low do you feel the gear reduction in the back tires? if so it’s the front actuator. If it doesn’t then it’s likely the solenoid on the transfer case. Mine has a similar issue, and I have narrowed it down to one of the two sensors on the transfer case that detect shift position.

Why is my front axle not working properly?

It is likely your Front Axle Disconnect is not engaging properly. This can be caused by worn bearings or a broken shift fork. You can check for worn bearings by grabbing the inner tripot joint (closest to the Front Axle Disconnect) of the right side axle and trying to wiggle it. Movement indicates worn bearings.

What should I do if my 4WD is not working?

With the ignition on, switch the 4×4 selector switch from 2HI to 4HI. You should hear two distinct mechanical whirring sounds. One from the middle of the truck (under you) and one from the front of the truck. I hear both whirring sounds: Go to Section 3.

What to do if your 4×4 selector switch is not working?

If replacing the 4×4 selector switch doesn’t work for you, try to find a local member with a verified working TCCM to swap in. If the problem goes away, return your friend’s TCCM and buy a replacement for yourself. Search these forums for replacement instructions.

What happens when an axle actuator stops working?

When the actuator stops working, you’ll know because you won’t be able to lock the front axles. This makes for a very ineffective 4WD system, and prevents power from being transmitted to all four wheels. The good news is replacing an axle actuator is simple and can be completed by the average DIY’er.

Where is the 4WD axle actuator located on a truck?

The 4WD axle actuator is located underneath the front end of your truck, and is naturally exposed to dirt, debris, salt, or other road threats. If the actuator’s housing is cracked or damaged, debris can build up and cause the wheel bearings to wear as well as cause lubricant leaks, which can eventually lead to a damaged 4WD system.

What happens when the actuator on a Chevy Silverado stops working?

The axle actuator in Chevy Silverado. When the actuator stops working, you’ll know because you won’t be able to lock the front axles. This makes for a very ineffective 4WD system, and prevents power from being transmitted to all four wheels. The good news is replacing an axle actuator is simple and can be completed by the average DIY’er.

How to replace front axle actuator GMC Sierra?

1A Auto shows you how to replace the 4×4 front axle shift actuator on a 2002 GMC Sierra. This part is the same for many GM 4WD trucks. The procedure is the same for the GMC Sierra and Chevrolet Silverado, years 99, 00, 01, 02, 03, 04, 05, and 06.

What happens when I shift from 2WD to 4WD?

Now my truck, when trying to shift into 4 high, makes a clicking and solenoid movement sound. The three lights on the dash for the 4WD, will blink when you push them, but then go back to 2WD shortly after. This happens for both 4 high and 4 low.

How much is a 4WD actuator switch from Advance Auto Parts?

Advance Auto Parts has 8 different 4WD Actuator Switch for your vehicle, ready for shipping or in-store pick up. The best part is, our Chevrolet K1500 4WD Actuator Switch products start from as little as $64.99. When it comes to your Chevrolet K1500, you want parts and products from only trusted brands.

Is there a 4 wheel drive selector switch?

The selector switch lights do work when first started then go out also the service 4 wheel drive light stays on. Scan test needed on the transfer case module. Anything else is wasting time and money!

Where to buy 4WD actuator switch for k1500?

Shop online, find the best price on the right product, and have it shipped right to your door. If you prefer to shop in person for the right 4WD Actuator Switch products for your K1500, visit one of our local Advance Auto Parts locations and you’ll be back on the road in no time!

What to do if your shift interlock solenoid is not working?

All you have to do is jump your battery, which a mechanic can help you with. If the vehicle does not shift from park to drive after the battery has been jumped, then it is time to look at the shift interlock solenoid. The shift interlock solenoid is an important safety feature on your vehicle.

How do I know if the IWE solenoid is working correctly?

Yes, it sounds like the actuator solenoid is working to control vacuum, but it may have allowed water in over time, damaging the IWE at the hub. You can test the ability of the IWE to hold vacuum by connecting it to a hand held vacuum pump.

What happens when you push the 4×4 button?

When you push the 4×4 button, it flashes, truck stays in 2wd, even though you can hear the clicking and hear the solenoid move. However, if you put the truck in neutral or park and shut the truck off, when you restart it, the truck will be in 4×4, and the indicator shows 4×4 but flashes.

How does an actuator work on a Silverado 4WD?

The way this actuator works, is it is a sealed chamber that gets heated by voltage. When it heats, the pin in the end swells and pushes a shift fork in the front differential. The shift fork engages a spline on the passenger side of the differential, and boom! you have 4WD.

Why is my 4WD not working on my Chevy Silverado?

When shifted out of 4wd, the switch opens up and no voltage goes to the actuator. I would check voltage at the connector for the front actuator (at the front differential – it looks like a large bullet that threads into the front diff.) If it has 12 volts, the actuator is the problem.

Is the front actuator an electric or vacuum?

Try the actuator first…85% of the time it is the fix. On the fullsize, the front actuator is electric, not vacuum.. When in 4wd mode, a switch on top of the transfer case conducts 12 volts out to the actuator. Wire #50 (brown) is the 12v feed, and it conducts to the light blue wire (#900) to the actuator.

What to do if your actuator is not working?

The actuator might be failing and not extending fully. Try jacking up the front end, reach through the actuator fitting hole, depress the actuating “button” with a long screwdriver and turn the driver’s side wheel. You should be able to feel if the axle is engaging. If it doesn’t engage, the problem is inside the front differential.

When did my 95 Chevy 4WD quit working?

95 Chevy 4wd quit working… I’ve got a 1995 Chevy K1500. I used the 4wd back in deer season, then didn’t use it for about 2-3 months. I went to use it the other day, and nothing worked.

What does a GM transfer case motor do?

One is a 1999 model, the other a 2000. Both use the same controls and happen to have stored the same DTC. The basic system consists of a transfer case motor and encoder, front differential actuator, transfer case module, speed sensors, switches and park input and output to the PCM.

How does transfer case switch to 4 wheel drive?

In order for the transfer case to switch into four wheel drive, 4×4 mode a gear must be turned inside the transfer case. The 4WD Transfer Case Shift Encoder motor is the part that turns the gear inside the transfer case, allowing your vehicle to be switched into 4×4 mode.

Is the GMC Suburban 4WD transfer case working?

Oh BTW I have a 99 GMC suburban with the auto 4wd transfer case. Last winter when I would put it in 4wd it was making a bad noise (almost like a wheel bearing roaring) but the 4wd was working then.

How does the transfer case control module work?

“The transfer case shift control module constantly monitors this signal voltage to determine the condition of the mode switch circuit.

Why is my 4 wheel drive not working?

1 Failed 4WD Actuator 2 Damaged Vacuum hoses 3 Failed Vacuum Solenoid 4 Transfer case shift motor

Why are my lights going out and the service 4WD light is coming on?

My lights are going out and the service 4wd light is coming on Have a 2008 Colorado . Replaced actuator when the shaft turns it does not engage the front axle it just makes a grinding sound I had the same problem on my ’04. I had to replace the bearings in the driver’s side axle tube.

What happens when a truck is in 2WD mode?

When the truck is in 2WD mode, which it should be when driving on a high traction surface like pavement or highway roads, the vacuum is active and disengages the front hubs by means of the front actuators sucking.

What to do if your 4 wheel drive won’t engage?

Since 2004+ they’ve been more robust and seldom cause issues. To test if the actuator is meshing and engaging, remove both lines and with the front still raised, the front CV shafts should be engaged and be rotating as well.

Why is my 4WD still not engaging after changing actuator?