Front axle actuator problem I went to a used auto parts place and got an OEM replacement part for it and slapped it on, replacing the old one. Investigate if the 4WD actuator is functioning properly. Mind you, this is a certified Chevy dealershipI got told $2400 for them to chase down the issue and replace the part. It also tells the transfer case to engage low-range gears in case 4L has been selected. Figure 1. A faulty vacuum switch or a I have replaced the front axle actuator (yesterday). Object Number: 924830 Size: SH Click here for detailed picture of above image. If it alternates from 2wd/4wd at 1 second intervals, the problem is the Engine Brake Actuator. The light on the floor shifter does not light up on the front axle. After changing both the clock spring and front diff actuator per their recommendation and not fixing the problem, I brought it to a local shop whw was able to correctly diagnose the problem. After checking to make sure everything is working in the transfer case and the front axle, I don’t think I am getting power to the actuator. Its a 98 f-150. Remove the front axle assembly, or atleast hang it to some degree or another. In this video I show where t Hi everybody! I have a 2003 Silverado 1500 ext cab 4x4 that worked fine in 4 wheel drive last winter but now the front axle won't engage. If not, the motor may be bad. The front axle actuator consists of the following circuits: When a shift to 4HI or 4LO is requested, the transfer case shift control module engages the front axle by grounding the front axle control circuit through a current limiting Recap - Front axle actuator engages by itself, even when shift lever is in 2WD position. The front axle system is crucial for the proper functioning of the vehicle, especially in four-wheel drive or all-wheel drive vehicles. The 4WD Serv. This will involved removing the CV axles, and the axle is heavy as fuck. com FREE One of the first symptoms of a potential problem with the front axle engagement switch is difficulty engaging the vehicle’s four-wheel drive system. A faulty front axle actuator will prohibit your truck from going into four wheel drive. . 5. check the front Diagnosing and replacing the actuator. If you are able to select 4LO and actually get it, then the problem is likely with the front axle actuator (check wiring first). light keeps on flashing and wont go into 4 low or high. Here is a link to a short DIY video. I have also checked the wiring on the actuator and have battery voltage on one wire to ground. The vacuum hose or vacuum lines connect the vacuum switch to the vacuum actuator, which engages the axle. I replaced This actuator is a direct replacement for both the front right (passenger side) and front left (driver side) actuator on your Ford. If you ran the actuator motor so the protruding part was OUT and reinstalled it, the splined disconnect would engage the passenger tire to the intermediate shaft, but that wouldn't put you in 4WD mode unless you also got the dead TCCM to operate the encoder motor and get the transfer case clutches to engage. Thanks. The tube on my transfer actuator cracked on the end and fell off. Reviewed in Canada on November 24, 2023. Consult your owner’s manual or repair guide for the exact location. Amrxuts 600-202 Shift Actuator Front Axle 4WD Vacuum Actuator for Dodge Ram 1500 2500 3500 W150 W250 W350 Pickup Ramcharge for Jeep Cherokee Comanche Wrangler 4506116 4882682. I have no idea why the NAPA replacement part list shows that 5 pin actuator as being a correct fit. The pigtailed 2 pin actuator in your comparison photo is a front axle actuator. He said he remembered a Chevy service bulletin from way back that added a spacer to the front axle actuator. The cost of repairing a front axle system issue can vary depending on the specific problem and the vehicle's make and model. What is the typical repair process for resolving the C0379 code in a Chevrolet due to a Front Axle Switch Circuit problem? If you use the Bravada front diff they don't use an actuator (since they are AWD the front diff is always engaged. Current State: Front axle actuator is unplugged, and will remain so until I figure out what the fix is. Gary Gilbert Channel-2011 AWD Axle Disconnect/ Actuator / And, I still do not think that the front axle is engaging. If I put it in 4x4 high, the whine goes away. I checked new actuator prior to installation. B. The problem could be the front disconnect actuator (the electronic black module bolted onto the face of the actuator assembly), the disconnect assembly itself, or the front differential (although if it were the front differential you would Four-Wheel Drive Does Not Work: SOLVED. 0 out of 5 stars 95 dodge ram 2500. ROBERT DEROUIN. I have the updated solenoid type actuator with like 5 pins in the plug. From a girl who knew NOTHING about these systems a few weeks ago - here is a quick and easy guide to troubleshooting your Front axle will not engage, I can hear the Transfer Case switching when I turn the knob to 4wd but the front axle is not working. Verify continuity and voltage with a multimeter. Obviously, the problem is that the solenoid doesn't actuate. Exact same problem with 'Transfer in Progress' message occurring randomly. To diagnose and replace a faulty actuator in your 2003 Dodge Ram, follow these steps: Locate the actuator: The actuator is typically mounted on the front axle or transfer case, depending on your specific model. The information will also help when setting up and preloading the differential case. Took multiple trips to shop to figure that out. 5 seconds on 2wd and . The transfer actuator is spring loaded and most will pop the gears out so you can't set the proper timing Well if putting it in 4HI locks the front driveshaft, than likely the transfer case and the transfer case encoder motor are engaging. One of the symptoms would be that the four wheel drive switch just flashes when trying to engage. So, in doing some www surfing, there is some sort of This code indicates a problem with the front axle actuator control circuit. I replaced bulb there. When I push the 4x4 button the transfer case engages but the front axle actuator will not engage. Any help from the forum would be greatly appreciated. Save 1997 - 2003 F150 - How to Troubleshoot and Fix F150 4X4 1997-2003 - I am posting this because it took me AGES to find this information and peice it together from many sources all over the internet. These days front axle engagement switches can be an actual switch, shifter, dial, or button. Common problem could be the front differential actuator. How to Replace 4WD Axle Actuator A bad axle actuator can put a serious damper on your off-roading fun. I don't carry a spare on the trails, but I've been considering it. The tap on the actuator and unplugging and replugging all the connections to both actuators seem to do the trick for me as well. Front ADD Front Axle Actuator: This part engages the front axle. I put my tv on stands, put it in 4wd, spun one wheel and the other didn't move. Summit Racing Equipment carries cable-actuated, electrical, and vacuum/electrical kits from 4x4 Posi-Lok, Alloy USA, RT Off-Road, and BD Diesel, plus Perm-Lok central axle disconnect locking systems from 4x4 Posi-Lok. The problem most people are experiencing is that after the old Posi-Lok kit is installed, there is a tremendous bind when trying to engage the front axle, via pulling the Posi-Lok cable in the cab. Disconnect Wiring: Unplug the actuator wiring harness carefully. light comes on shortly after, and after turning the ignition to off, it resets itself and cancels the 4wd serv light. For your 2011 Dodge Charger R/T Part Number: 68052258AA Includes Axle Disconnect Actuator and Solenoid. Four-wheel drive becomes stuck. If it alternates really fast at . I finally bought an AWD axle disconnect aka actuator aka solenoid and replaced myself, fixing the problem. While the engine is off: I turn the knob to 4hi or 4lo, you can hear the transfercase engage and the front axle actuator "whir" into action. Welcome to the Planet! Your system is a shift on the fly, which has an electric actuator that shifts the transfer case into 4WD and signals the front axle actuator to engage the differential by moving a spline sleeve onto the axle thereby stopping the front differential from"freewheeling" and effectively putting the vehicle in 4WD mode. From what I can tell. Disconnect the electrical connector from the front axle actuator, S4WD axle only. On average, the repair costs for front axle system issues can range from $200 to $800, including parts and labor. Buy 4WD Front Differential Axle Disconnect Actuator Assy Compatible with 2002-2009 Chevy Trailblazer and GMC Envoy, 2002-2006 Trailblazer EXT and Envoy XL, 2003-2008 Isuzu Ascender 600-115 12471623: Re: Another 4WD Actuator Fix This is just a big thank you to everyones input. In protetypes case the controller was seeing the signal that the xfer case was locked in but wasnt sending the signal to the front actuator. Water got in the actuator and corroded it. Chas99R1 Discussion starter. One of the first symptoms of a potential problem with the front axle engagement switch is difficulty engaging the vehicle’s four-wheel drive system. Good to know: Modern 4x4s use electronic solenoids, while older models use vacuum hoses Cost to Fix C0364. The problem most people are experiencing is that after the old Posi-Lok kit is installed, there is a The vacuum switch controls the flow of vacuum needed to engage and disengage the front axle. am i right? Flip switch to power position when you want front axle engaged. What kind of wire is on front axle actuator? This connector is mounted upright, and has Blu, Brown, and some other color wire, light Blu maybe. 4WD Hub Locking Actuator Problem The hub actuators connect the axle shaft to the wheel hub automatically when 4WD is selected. What's the A. The front diff does not have a traditional "pumpkin" like the rear diff and trucks with solid front axles. 5 seconds on 4wd then the problem is Selectable 2wd/4wd actuator. This, in turn, locks the differentials with either vacuum hoses or electronic solenoids and a shift-and-fork mechanism. If you are a keen driver, you can notice the issue before the actuator is wholly damaged as long as you know what to look for. Is there a limit switch that tells the truck the t-case is finished so it can engage the front axle, or is this likely just a problem with the front axle actuator? After installation of the actuator, turning truck back on and turning dial off, the locker disengaged (verified with front axle jacked up) but will not re-engage. The He reported bearings are good. they should be able to return parts if they find that the part they bought isn't OK, 4wd doesn't work. Whenever a shift to 4HI, or 4LO is requested, the transfer case shift control module engages the front axle by grounding the Nice info. This code specifically indicates a problem with the actuator supply voltage circuit in the front axle. This 4WD actuator directly replaces the original equipment part on specific vehicle applications. Then firmly pull off the vacuum line from the actuator assembly The front axle disconnect and and the actuator in the transfer case. A The front axle actuator, that engages a splined disconnect when you go into A4WD, 4HI, or 4LO - is a reportedly high failure rate item. The front axle actuator consists of a Permanent Magnetic (PM) motor, a worm gear controlled plunger, a front axle switch and an electronic control circuit. I recently had issues getting the 4WD to work in 4 LOW (the shifter works but it seems like its not engaging the front axle). Improve your 4x4 truck or SUV’s reliability and increase your control with manual front axle engagement systems. Check wiring for breaks, fraying, or corrosion. This is also why you will hear it grind if you try to engage 4x4 when the shafts are spinning different speeds. If it isn't, then it might be the sensor in the transfer case, a wiring problem (between the TC and the front diff), or the Front axle jerking; Grinding noise while driving; Metal scraping noise coming from the front axle; Usually, this issue can occur due to any of the following reasons – Failed 4WD actuator. 9L Manual Transmission. The first part is operated by the shift actuator on the transfer case that selects the 4wd mode. Took off the actuator, took a skrewdriver and used it to push in where the actuator slips into & it locks up. Not sure if that comes separate 4WD Actuator, Front Axle. The 4wd actuator is responsible for engaging and disengaging the front axle to switch between 2-wheel drive and 4-wheel drive modes. I have tried both 4hi & 4lo, the front drive shaft turns, I can hear the xfer case shifting, the front axle actuator has good power and ground & extends both by use of the dash bush buttons and with a scan tool but the front wheels won't Buy Auto Locking Hub 4WD 4x4 Axle Actuator, Fits Front Right or Left, Compatible with Ford F150, Expedition Lincoln Navigator Vehicles - 2004-2015 - Replaces Part 7L1Z-3C247-A: Wheel Bearing Tools - Amazon. If it does there is a problem in your front diff or some where else in the system. Application Summary: Cadillac 2010-02, 2000-99, Chevrolet 2015-88, GMC 2015-88, Isuzu 2008-06 Check Your Fit Where To Buy. You'll need an alignment if you take this approach. The actuator on the Ford F150 Usually a bad or failing clutch engagement switch will produce a few symptoms that can alert the driver of a potential issue. If it doesn't then the actuator is bad or there is a wiring problem. Common problem with the actuators. Product Description. Also, the "SERV 4WD" light came on but went out after driving in normal 2WD for a few miles. Instead, the front diff on the FJC is a clamshell type, meaning that the carrier housing opens side-to-side instead of from the front like a traditional pumpkin. I'm looking for a schematic of the 4x4 front axle actuator circuit. or you can have a problem in your transfer case, but I would look at that last and try the easy stuff first. My front axle actuator does not engage though, I have tried 2 different actuators and neither one will work. ~FH . Service AWD Light would eventually come on. It almost sounds like the front axle is staying connected when it shouldn't, but I thought that would throw a code if the dash buttons are in 2wd mode. Use a DMM or test light to check if the actuator is getting a signal from the TCCM. Every thing seems clean and the 12v motor work fine from both car and seperate Front Axle Actuator Problem. The problem started out with no 4x4 flashing 4X4 light and a check engine light. 4. 3. Secure it with jack stands. Doesnt look like its that complicated but sometimes looks are deceiving. I was on a trail, and the wires got ripped out of my If it is, then something is busted in the front diff (generally the passenger side shaft, or the locking gears). Four-wheel drive mode does not activate. Haven’t had a problem with it. Inside the housing of differential nothing is broken. ) I have a pair of vise grips locking the front axle in. 0 out of 5 stars Perfect fit. Use diagnostic tools to analyze The problem of the four-wheel-drive system of the car is one of the first indicators of a probable problem with the front axle movement switch. The front axle actuator engages and disengages the front axle. I've searched through the manuals on here and the ones I have, none seem to address the updated actuator. I started the truck and put a vacuum gauge on the hose and found no vacuum. In June the previous owner had the truck at the dealership and they changed the front axle actuator, so I think it is a problem with the The truck is a stick, if that matters. The shop said that the module under the drivers seat MAY need replacing but They can not give me a straight answer until I pay $500 for the new part and try it. I found that they had run over something and broken the vacuum hose off flush with the actuator case. Buy SecosAutoparts 4x4 Wheel Drive Front Axle Actuator Fork Disconnect Compatible With Dodge Ram 2500 3500 2013-2018# 68216944AB 68216944AA 68216944aa 68216944ab: Shafts - Amazon. Plug it back in and have some one push the 4x4 button. This information can be used in order to determine the cause of the axle problem. Sorry in advance if this is a repeat thread, but we are about to get hammered with hi all, after having the all too common flashing 4wd light problem, i decided to troubleshoot the front electric 4wd actuator on my 2003 rodeo. A defective switch can require the knob or button to be pressed and jostled multiple times before the You will know your 4WD actuator is bad when the 4WD (either 4H or 4L) becomes difficult to engage, gets stuck, or fails to activate. waltyotur 4WD Front Differential Axle Actuator Plunger Replacement for Chevy Avalanche K1500 K2500 K3500 Silverado GMC Canyon Yukon Cadillac Escalade Isuzu i-350 i-370 26060073 There was a problem filtering reviews right now. I replaced the Front 4X4 drive axle intermittrnly engages when the switch is placed in either of the 3 4x4 mopdes. Any help would be appreciated. 4 wheel low works on rear axle thats is. 20, and closed Dec. 12 posts · Implementation of this TSB on AWD vehicles replaces the Front Axle Disconnect Actuator (FADA) with what Ford is calling an intermediate shaft along with reprogramming the transfer case control module. It is responsible for activating or deactivating the four-wheel drive system. Front Axle Engagement: In many 4WD systems, the front axle is engaged by default when 4WD is activated. Disconnect the rack & pinion from the frame, shift it up and away from the actuator and finess the cover off. Service dept at dealer got that to stop, but A missing actuator leaves it in 2WD mode. You can then put vacuum directly to the different ports on the vacuum motor, spin the front wheel and see if it is locked by looking at the front driveshaft and seeing if it The latter then sends the signal to the 4WD axle actuator. Very scary if you love your 4*4. The second part is the actuator on the front axle that connects the axle to facilitate 4wd operation. The actuator should move, it's a liniar motor. Remove the Wheel: Take off the front wheel for better access. 57:1. I just replaced the 2 pin actuator on my '94 K1500 and had no problem finding the exact OEM replacement. It would rip the boots on the RCV cv, so replaced axles with normal aftermarket, and the cvs broke almost immediately when 4wd is engaged. Jump to Latest I have been trying to fix the 4wd on my 89 chevy 1500 pickup. Holiday Hours: Closed Thanksgiving & Black Friday, closing at 12 PM on Dec. Step 2: Remove the vacuum hose that is attached to the solenoid by using a screwdriver. Jump to Latest Is there anything you can do to by-pass the actuator or a way to make the front axle engage manually? 1991 YJ 4. Axle Locker. When this code is triggered, it means that the control module has detected a fault in the circuit that controls the actuator. Well if that is the case, you need to address the switch operation and the transfer case. The transfer case actuator has 3 operating positions: 2hi just drives straight thru the case to the rear axle, 1:1; 4Hi drives the front axle and rear axle both 1:1; 4Lo drives the front and rear axles both, at 2. This article will show you how to replace the axle actuator in your Chevy Silverado and get all four wheels Chevrolet Forum How-Tos. 50/15 TSL Radials Replacement actuator; Torque wrench; Step-by-step Guide. I think that it needs a hot wire going to both of the pins on the wiring connector. Some can be taken apart, clean the contacts on the wiper switch, greased and put back together. A common problem in older Land Cruisers is parts sealed at the factory 4WD Front Differential Axle Disconnect Actuator Assy Compatible with 2002-2009 Chevy Trailblazer and GMC Envoy, 2002-2006 Trailblazer EXT and Envoy XL, 2003-2008 Isuzu Ascender 600-115 12471623 in Differential Assembly Kits. Failure to have your actuator fixed timely will cause severe and costly damages to your 4WD driv When your 4WD actuator is faulty, you can experience many subtle and obvious symptoms. com FREE DELIVERY possible on eligible purchases F-150 4×4 Actuator Problem Symptoms . This in It engages and locks the differentials to activate selectable 4WD modes on demand and is activated using a front axle engagement switch. I have the entire front end up now, will pull the actuator out and see what it does when I switch from 2H to 4H. The end result is elimination of the vehicle’s capability to disconnect the front axle, making it a full time AWD drivetrain. Actuator location on the front differential. a common problem is a Faulty actuator: The actuator is responsible for engaging and disengaging the 4WD system. I then spin one wheel and the other wheel spins the opposite Replace the front axle actuator and include the applicable wiring harness kit. 1. 4WD; General Overview; Brakes; Engine and same identical problem. Depends on how long it took them to find the problem. Thanks for the replies! Passenger side only wheel spins freely in 4HI. Just wondering how to take off the 4 wheel drive actuator located on the fron axle. Check to make sure you have vacuum at the transfer case this will be supplied by a hose from the intake manifold (this will require you to check under the vehicle with the engine running - I recommend you jack all 4 When the actuator fails, the controller enters failure mode and the indicator light illuminates 2WD,4WD alternately. Recap - Front axle actuator engages by itself, even when shift lever is in 2WD position. There was a problem filtering reviews right now. Any of these symptoms means that your actuator is faulty and it should be checked immediately. I also need a pin out of the actuator. The 4WD actuator is a part of your Ford F-150. Step 2 – Remove the actuator assembly. 1994 Chevy K1500 Z71, 6. The front axle actuator is responsible for engaging and disengaging the front axle in four-wheel-drive vehicles. C0364 2015 GMC Sierra Code Service 4WD light comes on the dash and the truck does not go into 4WD. Culprit seems to be the "front axle disconnect solenoid". I know the front axle disconnect assembly will be an expensive fix if that’s the problem. Hey, if you remember, I made a post about 6 months ago about my 4x4 not working. The actuator has 12V, ground, command signal in, and position signal out at its connector. 2016 RAM 2500 4x4, 70K miles. I'd take a guess and say it's the front actuator. i have finally decided to put the front axle actuator on a toggle switch. com) Take the front axle actuator out of the axle. The Vacuum lines rotted off which control the actuator. Front axle in both 4L and 4H is definitely In my case, 4transfer case switches, one dash switch, vacuum hoses, one transfer case, one front axle actuator, one actuator cable, and 4 transmissions later, I have only the front axle disconnect to replace and then I would have replaced all the 4wd components in the front end except the TCCM. 5L TD :sfa: 145,000 miles - Diagnosis involves using an OBDII scanner to retrieve the code, inspecting the front axle switch and related wiring for damage, and testing the transfer case control module and front axle actuator for proper function. Refer to the Parts Information in order to determine which wiring harness kit is needed. Disengagement issues may stem from problems with the actuator or vacuum lines that control the front axle’s 4wd actuator problem. 56 gears with 33/10. I believe its the front axle actuator from researching some threads. When you push the button the system locks in the xfer case first. Using a 7/16" socket, remove the skid plate below the actuator assembly. at first i had 12volt power only in one wire. That should help you locate the problem part. I also have(had) 2002 Tundra front actuator problem. After replacing the axles with RCV (very sting), and rebolting the ring gear there is an audible clunk when engaged in 4wd. Reviewed in the United States on November 9, 2024. This system is crucial for the proper functioning of the vehicle, as it is responsible for transferring power from the engine to the front wheels. The problem with this kit is that it is difficult to install, and only addresses part of the S-10 front axle engagement problem. Inspect the front axle actuator, wiring, and connectors for any visible damage or corrosion. I jacked the truck up and checked the front axle vacuum actuator first. Save Share Reply Quote Like. One of the first symptoms of a potential problem with the front I have a 2007 Colorado 2. By referring to the wiring diagram, you can identify the different components and their connections, allowing you to troubleshoot any electrical issues that may be causing the 4wd system to malfunction. joining the front and rear Driveshafts and axles to significantly enhance your vehicle’s off-road capability. Karl LeBlanc. A bolt on front differential ring gear backed out and was forced through the diff case. Four-Wheel Drive Does Not Work: SOLVED. Any ideas as what the problem could be? Current: 2011 Denali HD LML Duramax RDT EFI Live by Kory Willis, PPEI Transmission Tuning, Flo Pro 4” Dual gear controlled plunger, a front axle switch and an electronic control circuit all within the actuator assembly. Park brake, put in neutral and transfer case in neutral. Get a long piece of vacuum hose (you are probably going to need it anyway). 23–Jan. Chevrolet Silverado 1999-2006: How to Replace 4WD Axle Actuator. Skip to Content. It is similar to locking the hubs in the old days, but it happens inside the axle housing. Yes the front actuator engages the front axle but it can't be the only problem because if your transfer case was still in 2 wheel drive, it would never "drive" your front wheels unless your transfer case was engaged (power through your front driveshaft). Not sure I need the actuator - just the solenoid. If you can turn the front wheels independently from each other, you have a front axle actuator problem. I mentioned the 4WD front axle engagement problem I'm having but didn't specifically ask him to spend time on it unless he saw something obvious. Ford, for instance, makes use of a vacuum 1. If you have any problem with our Replacement 4WD Front Axle Actuator & Disconnect for Chevy Trailblazer, feel free to The problem with this kit is that it is difficult to install, and only addresses part of the S-10 front axle engagement problem. Also, when I am driving in 2wd, I hear a whine from the front end. Test the front The system you have uses a vauum control valve on the transfer case that when activated provides vacuum to a vacuum motor on the front axle. I'm not sure if it's easy to do with an automatic transmission, but the front differential doesn't seem to like it when you attempt to go into 4x4 when the front tires are not spinning (or close to it) and the rears are- usually with the RPMs above idle. Didn’t feel like spending the money on the posi-lock cable system, didn’t want to chase down the broken vacuum lines. i can hear transfer case shifting into low and high, front drive shaft is turning but no action on front axle actuator. 2. I still have no 4 wheel drive. Please try again later. Troubleshooting Dodge Ram 4WD: Why It’s Not Engaging (truckguider. Truck info: 2014 2500 Tradesman (base model) 84,000 miles Repair and replacement of the Four Wheel drive actuator on the front axle my 2000 Dodge. splice into the brown, it will be 12v on when 1997 - 2003 F150 - 1998 f150 front axle actuator removal - Hi there. Step 1: Locate the solenoid on the front axle of your vehicle. In fact, I enlisted the help of my 9yo to listen and the rear actuator makes a distinct noise when activated by the dial whereas the front doesn't. I ended up taking it to an auto electrician who found the short in the front axle actuator. The C0364 GMC code relates to an issue within the front axle system of the vehicle. Lift the Vehicle: Use a jack to lift the F150. Difficulty engaging four-wheel drive. It worked fine. The actuator can use Looking underneath the front passenger's side of the truck, you will see the actuator on the front differential. Locate the Actuator: Find the actuator on the front axle. The C0364 code for Chevrolet vehicles indicates a problem with the Front Axle System. I have a 2018 Wrangler JL with just over 16,000 miles on it. Once it is locked it, then it sends the signal to the front axle actuator to lock it in. Inspect front axle control circuit for damage or issues. 1996 model trucks with a build date on or after January 2, 1996 are considered as "961". after disconnecting the battery cables and leaving them hooked together overnight, i now have power Oh yeah there's a shift fork in front axle that actuator engages to lock it in right . Confirm front axle actuator functionality. It won't finish engaging 4wd moving or stopped, or if I roll it forward and back. Fingers crossed it’s a mechanical failure in the actuator. Jack up the front passenger side wheel. They took several days to figure out that the front axle actuator was shorted out somehow, and that was causing the “Service Parking Brake” to come on. I changed the front axle actuator today, and searched the forums, with vague results. So I guess I need one of these: ACTUATOR. If the build date of the truck is unknown, verify the 3 character I have been trying to get my 4wd working on my 2008 3500 dually. Same symptoms: flashing light,no engagement,etc. This is an explanation for those who have problems with the 4WD actuator in the front differential, and need a quick fix. 0 5 speed Hard Top 233,000 miles Mods: SYE & Tom Woods Custom Drive Shaft SOA with 4. rrnu sommco yrvh opbweb zxmrtdt ikka skbq dbb ibi hbtwz