2019 IWE noise

[FordTechOne]

I have had a rattle/grinding on hard acceleration since new. 2WD only. My dealer has finally concluded it's a 4WD issue. But that is as far as they can get. They say they check all the vacuum lines. They can't find the problem. They are back to looking for codes.

With all that is going on, I don't want my truck in the shop. I think it's best if I just fix it myself.

My dealer says the 2019 don't have the IWE check valve or solenoid issue. Is that true?

Any ideas where to look?

2019 models received an updated calibration strategy per the SSM below:

SSM 48088 - 2019 F-150/Expedition/Navigator - 4WD - Revised IWE Operation Strategy After Initial Start Up
2019 F-150/Expedition/Navigator vehicles equipped with four-wheel drive (4WD) have a revised transfer case control module (TCCM) strategy that will affect integrated wheel end (IWE) operation after initial start up. The TCCM will not energize the solenoid to supply vacuum to the IWEs after the initial key cycle and a driven gear is selected. The IWEs will remain engaged for 0.8 km (0.5 mi) when the temperature is above 0°C (32°F) and 3 km (2 mi) when below 0°C (32°F). The strategy changes were implemented to improve vacuum supply management and axle warm up in cold temperatures. The engine must run for a minimum of 5 minutes to build sufficient vacuum before performing any vacuum related testing. Refer to the Workshop Manual (WSM) Section, 307-08A - Four-Wheel Drive Systems - System Operation and Component Description for additional information.

There is a LOT more to diagnostics than just "checking the vacuum lines". Ford recently updated the Pinpoint Test specifically to assist dealers with accurately diagnosing and repairing IWE issues. The dealer should have performed Pinpoint Test D in Workshop Manual Section 308-07A. The Pinpoint Test provides a comprehensive diagnosis of the entire IWE system. If the concern can be duplicated during a road test and they can't isolate the issue through the available diagnostic pinpoint testing, find a new dealership.

 

[solsurfr]

I'm continuing to go thru this battle for months now, probably close to 6 months. First replaced the IWE check valve...that helped for about 2 weeks (after 3-4 trips to the dealer who wouldn't work on it because I couldn't replicate it). The the grinding came back with a vengeance and my dealer finally heard it consistently.... they replaced the hub assembly. This lasted for another two weeks and here I am again. The grinding isn't as consistent as it was before but it surfaces every 4-5 drives. Can you kind folks help me craft the summary appropriately so the techs can go right in and diagnose?

 

[FordTechOne]

I'm continuing to go thru this battle for months now, probably close to 6 months. First replaced the IWE check valve...that helped for about 2 weeks (after 3-4 trips to the dealer who wouldn't work on it because I couldn't replicate it). The the grinding came back with a vengeance and my dealer finally heard it consistently.... they replaced the hub assembly. This lasted for another two weeks and here I am again. The grinding isn't as consistent as it was before but it surfaces every 4-5 drives. Can you kind folks help me craft the summary appropriately so the techs can go right in and diagnose?

I am disappointed to hear what you are going through. In my opinion, it is unacceptable for any dealership to fail to diagnose a simple IWE issue with the extensive diagnostics readily available.

As you have a 2017, a TSB was recently released to assist the dealership with diagnostics. TSB 20-2028 was released 2/11/2020; if you haven't been to the dealership since then, go back and ask them to perform the TSB. If you have been to a dealership after that date, they failed to run a Symptom Coded OASIS and properly diagnose and repair your vehicle. At which point I'd recommend calling Ford's Customer Assistance Center and finding a new dealer. If automotive franchise laws didn't exist, we'd all be better off.

 

[solsurfr]

I am disappointed to hear what you are going through. In my opinion, it is unacceptable for any dealership to fail to diagnose a simple IWE issue with the extensive diagnostics readily available.

As you have a 2017, a TSB was recently released to assist the dealership with diagnostics. TSB 20-2028 was released 2/11/2020; if you haven't been to the dealership since then, go back and ask them to perform the TSB. If you have been to a dealership after that date, they failed to run a Symptom Coded OASIS and properly diagnose and repair your vehicle. At which point I'd recommend calling Ford's Customer Assistance Center and finding a new dealer. If automotive franchise laws didn't exist, we'd all be better off.

Appreciate the feedback. I did escalate this issue to the director of service/parts who runs 6 ford dealerships for their family brand. He was completely understanding and wants to get to the bottom of this once and for all. They plan on keeping my truck for however long it takes and will go through that TSB in great detail, as he told me. I'll get a new Ford Ranger as a loaner which helps.

Golly, this forum is worth its weight in gold!! Thank you for your help.

 

[11F150]

I hate to come across this thread but today my 2020 made a rattle sound that made me concerned. I made a left hand turn onto a main road, accelerated normal to 35 mph and then heard a rattling for 3 seconds. My truck has 800 miles on it. Is replacing the $20 tube still working? Crazy a truck this new has something going on with it already.

 

[alphatwox]

I hate to come across this thread but today my 2020 made a rattle sound that made me concerned. I made a left hand turn onto a main road, accelerated normal to 35 mph and then heard a rattling for 3 seconds. My truck has 800 miles on it. Is replacing the $20 tube still working? Crazy a truck this new has something going on with it already.

Like the RJ facebook page, try driving around in 4A for a bit. You won’t do any harm to your truck and if you don’t hear that noise again, you can most likely narrow it down to the check valve/vacuum tube. Buy two to keep one on hand. It’s a common issue with the vacuum system that controls the IWEs in Fords.

But, also, with 800 miles on it, take it to Ford, let them mess around with it first if you want. For me, the quickest, easiest and least hassle free way was changing the valve and calling it a day.