![]() ![]() Hey, just wanted to point out a couple things i didn't see in the comments. If I ended up replacing everything you did on your truck do you have an idea of price and hours to do the job? I'm out of warranty and tend to fix most of my vehicle problems on my own vs paying an arm and a leg to have a repair shop do it. First thing I will check is the hoses and connection and hopefully I can get lucky with it being an easy fix. After the brake pads didn't make it better I engaged in in 4wd and it goes away. After reading your post I'm sure this is exactly my problem. Although the pads were almost to the point of replacing, so it needed to be done anyways. The problem didn't go away, as I was sure it wouldn't because I've never had brakes make that kind of noise and the rotors are decent no pulsating feeling in the brake pedal upon stopping. I thought it was a brake issue so I replaced my brake shoes and made sure the rotors were in good shape. This just started becoming more noticeable over the last 2 weeks. I'm having the same grinding in 2wd on acceleration and slowing down during low speeds. While this generally results in a decrease in fuel economy and some extra wear and tear on the front driveline (though not by a significant amount), at least your grinding will be gone. If all else fails and you're desperate to make the grinding stop, check out the 2004-2020 F150 RCV IWE Eliminators, which delete your truck's IWE actuators and permanently lock your CVs to the front hubs. I'm not sure if there's a model year or submodel split, but make sure you check before reassembling your hub and and knuckles. I had to swap over my stock ABS wiring in order to get it to fit. One other quick note: the Moog 515119 hubs that I used DID NOT have the correct connector for my truck's ABS body harness. In all honestly, this was probably the beginning of this truck's IWE problems, but given that it's a work truck and the IWE system isn't easy to diagnose, it probably went for awhile without anyone really caring.Īnyway, the moral of the story is that if you're getting intermittent grinding from your IWE system, check your lines first so that a $30 part doesn't turn into a couple hundred bucks worth of hubs and IWE actuators. ![]() It was almost impossible to see, since it was on the side facing toward the frame, but with the IWE line being that only remaining culprit, I replaced it. That's the driver's side IWE actuator vacuum line with a nice tear in it near the push clip that holds it to the frame near the ABS line. Not knowing how long it had been doing that, I assumed that both the actuators and the hubs were toast, which turned out to be a pretty good assumption. With the truck grinding pretty consistently under part throttle and while turning in 2WD (but not 4WD), I knew something was up with the IWEs. The grinding is generally caused by the actuators not getting enough vacuum to disengage completely with the hub, and while that sounds simple, there could be several causes. When the IWE system starts to fail, the first tell-tale sign is a grinding sound in 2WD, usually only under certain conditions when it first starts, but gets progressively worse as you go along. ![]() Which brings us to our 174,000 mile XL, which did spend most of its life working outdoors. Your front wheel hubs (I used Moog part# 515119), though not technically part of the IWE system, they play a role and can suffer during an IWE failure. The IWE actuators (I used the 2011-2015 F150 Dorman IWE kit for this guide, OEM part# is 7L1Z3C247A, I believe). The IWE Solenoid/Valve Assembly (part# 7L1Z-9H465-B), which controls the flow of vacuum when you change drives. The IWE system is made up of four basic parts: 1). While actually a pretty clever way of doing things, anything vacuum-operated is prone to problems, and the IWE system isn't an uncommon point of issues on any 4WD F150, regardless of engine option. The system works off of vacuum and functions a little counter-intuitively in that it uses vacuum to keep the hubs unlocked for 2WD and shuts off the vacuum to lock the front hubs for 4WD. In what should come as no surprise to anyone is that a 2011 F150 with 174,000 miles has its fair share of problems, one of the most egregious for our 2011 F150 XL Project Truck was a broken IWE system that caused pretty horrendous grinding and sounds of suffering when first taking off and when turning.įor the uninitiated, Ford's Integrated Wheel End (IWE) system is what locks and unlocks the front hubs when you change back and forth from 2WD and 4WD. ![]()
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