Intermittent grinding noise
10-30-2019, 04:44 PM
#1
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Intermittent grinding noise
2018 F150 XLT w/3.5 Ecoboost
I have a very intermittent issue. It doesn't happen in the summer but now that its getting cooler outside,(I'm in PA) I'm starting to notice it again.
I'll start the truck up with the remote starter and let it run 10 minutes before leaving. I jump in, back out of the driveway, put in in drive and hit the gas.
I'll hear a terrible grinding noise. For some reason, it makes me think its trying to go into 4wd. It doesn't sound internal to the motor or transmission.
If I keep on the gas, the noise will continue.
If I let off the throttle, the noise stops instantly. If I keep off the throttle for a few seconds, the noise will not return until the next time the truck sits long enough to get cold.
Any clues on what this may be?
I have a very intermittent issue. It doesn't happen in the summer but now that its getting cooler outside,(I'm in PA) I'm starting to notice it again.
I'll start the truck up with the remote starter and let it run 10 minutes before leaving. I jump in, back out of the driveway, put in in drive and hit the gas.
I'll hear a terrible grinding noise. For some reason, it makes me think its trying to go into 4wd. It doesn't sound internal to the motor or transmission.
If I keep on the gas, the noise will continue.
If I let off the throttle, the noise stops instantly. If I keep off the throttle for a few seconds, the noise will not return until the next time the truck sits long enough to get cold.
Any clues on what this may be?
10-30-2019, 05:22 PM
#2
Sounds like the IWE check valve issue. Just search its a common issue... dont keep driving it like that put a new check valve on asap. You can ruin the integrated wheel ends.
https://www.google.com/url?sa=t&source=web&rct=j&url=https://static.nhtsa.gov/odi/tsbs/2018/MC-10149748-9999.pdf&ved=2ahUKEwjvl_j69sTlAhXCmuAKHVEsBdAQFjAP egQIBRAB&usg=AOvVaw2yuZUbHGW4aW-pMJKa_8S5&cshid=1572471022526
https://www.google.com/url?sa=t&source=web&rct=j&url=https://static.nhtsa.gov/odi/tsbs/2018/MC-10149748-9999.pdf&ved=2ahUKEwjvl_j69sTlAhXCmuAKHVEsBdAQFjAP egQIBRAB&usg=AOvVaw2yuZUbHGW4aW-pMJKa_8S5&cshid=1572471022526
Last edited by RJ06FX4; 10-30-2019 at 05:32 PM.
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rbird2 (10-31-2019)
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RJ06FX4 (10-30-2019)
10-30-2019, 06:30 PM
#4
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I agree, identical thing happened to me with a new '17, 2 years ago. Something you can do before you tear up an IWE, is pull the electrical connector on the IWE solenoid. This will engage your IWEs, but not the transfer case. Won't hurt a thing to drive like that. In fact, from'17 on up, the 4X4 system is programmed to engage the IWEs for a short time, to warmup front diff. There's been a couple revisions to this since '17, but it's all for the same purpose.
Then get a new checkvalve.
Tube Assembly - Ford (FL3Z-3A788-B) TascaParts.com (1)
Then get a new checkvalve.
Tube Assembly - Ford (FL3Z-3A788-B) TascaParts.com (1)
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tbroberts (11-07-2019)
10-30-2019, 08:11 PM
#5
It's my first day
Part number is Motocraft YG360.
It takes less than 2 minutes to change with no tools required.
10-31-2019, 04:40 AM
#6
..
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10-31-2019, 07:21 AM
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10-31-2019, 07:38 AM
#8
Pay close attention to step 11 of TSB 19-2252:
Is the vehicle a 2017 or 2018 built on or before 17-Sept-2018?
Yes - reprogram the TCCM using the latest version of the appropriate Ford scan tool.
• Note: The new TCCM calibration changes IWE operation at start up. When ambient temperature is above 0°C
(32°F) the IWEs stay engaged regardless of a 4WD mode change for approximately 0.8 km (0.5 miles).
Engagement only occurs once per key cycle and is not reset when shifting between PARK and DRIVE. The
TCCM uses this strategy to delay vacuum use until vacuum-intensive engine startup has completed and
sufficient vacuum is available to fully disengage IWEs.
---------------------------------------------------------------------------------------------------------------------------------------------
This is new for 2017/18s. The new strategy updates these vehicles to the same strategy as the 2019s:
Is the vehicle a 2017 or 2018 built on or before 17-Sept-2018?
Yes - reprogram the TCCM using the latest version of the appropriate Ford scan tool.
• Note: The new TCCM calibration changes IWE operation at start up. When ambient temperature is above 0°C
(32°F) the IWEs stay engaged regardless of a 4WD mode change for approximately 0.8 km (0.5 miles).
Engagement only occurs once per key cycle and is not reset when shifting between PARK and DRIVE. The
TCCM uses this strategy to delay vacuum use until vacuum-intensive engine startup has completed and
sufficient vacuum is available to fully disengage IWEs.
---------------------------------------------------------------------------------------------------------------------------------------------
This is new for 2017/18s. The new strategy updates these vehicles to the same strategy as the 2019s:
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.
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.
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10-31-2019, 07:46 AM
#9
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Thanks again.
Looks like there will be more than a few guys requesting the reflash. I guess it's up to the dealer to do this unless the vehicle is having problems?
Looks like there will be more than a few guys requesting the reflash. I guess it's up to the dealer to do this unless the vehicle is having problems?
10-31-2019, 07:49 AM
#10
I have proactively replaced the IWE check valves on all 2015-18s and updated the calibration on all 2017-18s.
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johnday in BFE (10-31-2019)