Ecoboost Performance Forum

Ecoboost Performance => Troubleshooting, Maintenance, TSB Articles => Troubleshooting => Topic started by: sub_ETCS_ret on December 04, 2018, 06:59:48 PM

Title: PTU Failing??
Post by: sub_ETCS_ret on December 04, 2018, 06:59:48 PM
I'm getting a weird noise from the front right side of the car. It's mainly when the car is cold and turning left under acceleration. It sounds like a clicking or something slapping the firewall from the front right side by the passenger's feet. When the wheel gets straightened it stops.

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Title: Re: PTU Failing??
Post by: ZSHO on December 04, 2018, 07:12:18 PM
Right-Half shaft maybe! Check Trans fluid level ASAP!  Z
Title: Re: PTU Failing??
Post by: SHOdded on December 04, 2018, 07:15:01 PM
Either the halfshaft as per the 2013 recall, or the strut mount/bearing are most likely.  Tie rods sometimes fail.  Far less frequently control arms/swaybar links.  So halfshaft/CV joint and strut mount would be my gotos.
Title: Re: PTU Failing??
Post by: sub_ETCS_ret on December 04, 2018, 07:37:54 PM
Thanks! I was thinking half shaft.

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Title: Re: PTU Failing??
Post by: sub_ETCS_ret on December 04, 2018, 07:38:30 PM
Quote from: ZSHO on December 04, 2018, 07:12:18 PM
Right-Half shaft maybe! Check Trans fluid level ASAP!  Z
Are you talking PTU fluid or transmission?

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Title: Re: PTU Failing??
Post by: SHOdded on December 04, 2018, 07:42:57 PM
Trans fluid level.  Does not seem like a PTU problem at all.  Much more likely to be a hub/bearing problem or halfshaft problem.
Title: Re: PTU Failing??
Post by: sub_ETCS_ret on December 04, 2018, 07:45:48 PM
Quote from: SHOdded on December 04, 2018, 07:42:57 PM
Trans fluid level.  Does not seem like a PTU problem at all.  Much more likely to be a hub/bearing problem or halfshaft problem.
Appreciate it.

Why would it only make the noise when it's Cold? Seems like if it were a wheel bearing or half shaft it would make the noise all the time.

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Title: Re: PTU Failing??
Post by: sub_ETCS_ret on December 04, 2018, 07:49:19 PM
Looking for a video or instructions on replacing the half shaft. Is it easy on this car?

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Title: Re: PTU Failing??
Post by: ZSHO on December 04, 2018, 08:01:03 PM
How many miles on your SHO!
The Half Shaft recall is usually a visual inspection IIRC!
Here's a video that should give you some insight.  Z

https://youtu.be/BnbCig-wR1Q
Title: Re: PTU Failing??
Post by: SHOdded on December 04, 2018, 08:09:47 PM
Fluids are thicker when cold and do not flow as easily.  This means less lubrication for components, and more likelihood of improper engagement or metal-to-metal contact.

Same goes for hard parts - due to expansion and contraction, gaps may go out of spec when cold, but be in spec when warmed up.

This is not even accounting for the presence of actual wear, which exacerbates the issues at hand.
Title: Re: PTU Failing??
Post by: sub_ETCS_ret on December 04, 2018, 08:16:40 PM
Quote from: ZSHO on December 04, 2018, 08:01:03 PM
How many miles on your SHO!
The Half Shaft recall is usually a visual inspection IIRC!
Here's a video that should give you some insight.  Z

https://youtu.be/BnbCig-wR1Q
Lol. I think you attached the wrong video.

So even though I have a 2015 you think the recall may apply.

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Title: Re: PTU Failing??
Post by: sub_ETCS_ret on December 04, 2018, 08:17:29 PM
Quote from: SHOdded on December 04, 2018, 08:09:47 PM
Fluids are thicker when cold and do not flow as easily.  This means less lubrication for components, and more likelihood of improper engagement or metal-to-metal contact.

Same goes for hard parts - due to expansion and contraction, gaps may go out of spec when cold, but be in spec when warmed up.

This is not even accounting for the presence of actual wear, which exacerbates the issues at hand.
Gotcha! I was thinking external pieces and not the pieces going into the transmission.

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Title: Re: PTU Failing??
Post by: SHOdded on December 04, 2018, 09:00:10 PM
It is the correct video in that it explains the reason we think the axle might be involved :)
Title: Re: PTU Failing??
Post by: Macgyver on December 04, 2018, 10:55:48 PM
Half shaft or hub bearing
Title: Re: PTU Failing??
Post by: sub_ETCS_ret on December 05, 2018, 11:12:15 AM
Quote from: SHOdded on December 04, 2018, 09:00:10 PM
It is the correct video in that it explains the reason we think the axle might be involved :)
Yesterday it was a video of the uniden radar detector. I believe it was corrected with the right video.

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Title: Re: PTU Failing??
Post by: sub_ETCS_ret on December 05, 2018, 11:22:02 AM
So it doesn't really sound like that but I still think you may be right. It sounds more like a piece of hard plastic slapping the firewall and not such a click like in the video. As a mater of fact I can probably count the number of clicks during the turn. I have a turn I make everyday and in that turn I think it clicks 4 times. It could also be described as slightly muffled. I'm going to open my window today and see if I can here it. I tried driving in circles and it doesn't do what the video shows. It only seems to happen on a more severe turn under acceleration. I even took it to a parking lot and tried hard turns under acceleration and couldn't make it happen. The car has 38k on it.

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Title: Re: PTU Failing??
Post by: ZSHO on December 05, 2018, 11:31:41 AM
Quote from: sub_ETCS_ret on December 05, 2018, 11:12:15 AM
Quote from: SHOdded on December 04, 2018, 09:00:10 PM
It is the correct video in that it explains the reason we think the axle might be involved :)
Yesterday it was a video of the uniden radar detector. I believe it was corrected with the right video.

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Glad it wasn't a naughty video!  Z :D
Title: Re: PTU Failing??
Post by: SHOdded on December 05, 2018, 11:37:13 AM
Could be a loose shield then.  The underbody shield has to be removed for servicing, perhaps one or more corners are loose enough to make a sound during the turn.  Or could be a brake dust shield but that would be metallic sounding.  Fender splash shield possibly.
Title: Re: PTU Failing??
Post by: sub_ETCS_ret on December 05, 2018, 11:55:00 AM
Quote from: ZSHO on December 05, 2018, 11:31:41 AM
Quote from: sub_ETCS_ret on December 05, 2018, 11:12:15 AM
Quote from: SHOdded on December 04, 2018, 09:00:10 PM
It is the correct video in that it explains the reason we think the axle might be involved :)
Yesterday it was a video of the uniden radar detector. I believe it was corrected with the right video.

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Glad it wasn't a naughty video!  Z :D


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Title: Re: PTU Failing??
Post by: sub_ETCS_ret on December 05, 2018, 11:59:34 AM
Quote from: SHOdded on December 05, 2018, 11:37:13 AM
Could be a loose shield then.  The underbody shield has to be removed for servicing, perhaps one or more corners are loose enough to make a sound during the turn.  Or could be a brake dust shield but that would be metallic sounding.  Fender splash shield possibly.
I don't think it's the splash shield (that was my first thought when this happened). It sounded like an axle turning and the splash shield hitting it. But I'll check the underbody and the brake shield. I'll recheck the fender splash shield.

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Title: Re: PTU Failing??
Post by: ZSHO on December 05, 2018, 12:06:17 PM
Check the front wheels for any play while moving it side to side and check for any signs of leaks under the vehicle...
Did you happen to check for any Codes! 

BTW It could be the Spline axle shaft your hearing! If that's the case need to make sure you get a set of updated (metal) thrust Washers.  Z


(http://i64.tinypic.com/huqgkg.jpg)(http://i66.tinypic.com/1r4vw7.jpg)

(https://i.imgur.com/EoUZonUh.jpg)
Title: Re: PTU Failing??
Post by: sub_ETCS_ret on December 05, 2018, 05:59:11 PM
Quote from: ZSHO on December 05, 2018, 12:06:17 PM
Check the front wheels for any play while moving it side to side and check for any signs of leaks under the vehicle...
Did you happen to check for any Codes! 

BTW It could be the Spline axle shaft your hearing! If that's the case need to make sure you get a set of updated (metal) thrust Washers.  Z


(http://i64.tinypic.com/huqgkg.jpg)(http://i66.tinypic.com/1r4vw7.jpg)

(https://i.imgur.com/EoUZonUh.jpg)
Thanks! Last time I checked there weren't any codes. I'll check again.

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Title: Re: PTU Failing??
Post by: sub_ETCS_ret on December 06, 2018, 11:00:33 AM
Checked the transmission fluid level and it was at the bottom of the cross hatches on the dipstick. Added some fluid and will see how it acts later today.

Going to be completely honest here. I've owned well over 20 different cars in my life, some new and some beaters, and this is the first time I've ever had to add transmission fluid. Is this something common on the SHO? Just curious If it's something I should keep a constant vigil on.

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Title: Re: PTU Failing??
Post by: ZSHO on December 06, 2018, 12:37:51 PM
Need to get the SHO up in the air and inspect for leaks around the Half Shaft plus check for wheel play my friend! I had a feeling the Trans fluid was going to be on the low side as mentioned on my initial post. Z 
Title: Re: PTU Failing??
Post by: sub_ETCS_ret on December 06, 2018, 02:41:10 PM
Quote from: ZSHO on December 06, 2018, 12:37:51 PM
Need to get the SHO up in the air and inspect for leaks around the Half Shaft plus check for wheel play my friend! I had a feeling the Trans fluid was going to be on the low side as mentioned on my initial post. Z
I agree. I'll keep you posted.

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Title: Re: PTU Failing??
Post by: SHOdded on December 06, 2018, 05:22:23 PM
Normally do not need to keep on eye on trans fluid level.  Assuming it is filled correctly to begin with.  On level ground  in park, engine running, normal trans operating temp.

If it leaks, usually it will leak into the PTU then out the vent. 
Title: Re: PTU Failing??
Post by: sub_ETCS_ret on December 07, 2018, 07:30:34 PM
OK, the fluid didn't change the sound.

I'm thinking I'll try the thrust bearing first. If it's not the thrust bearing can anyone point me to the directions to remove the half shaft?

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Title: Re: PTU Failing??
Post by: SHOdded on December 07, 2018, 08:05:57 PM
Dunno if Gen 5 is different from Gen 4 half shaft removal procedure.  Had posted for a 2010 a while back, will post for a 2013 soon.
Title: Re: PTU Failing??
Post by: SHOdded on December 08, 2018, 01:35:34 AM
2014 Taurus Front Shafts Axles R&R
Title: Re: PTU Failing??
Post by: ZSHO on December 08, 2018, 07:53:58 AM
I'm hoping it's something simple as rust buildup around the spline and a faulty thrust washer can lead to your issues due to lack of grease inside the perimeter.  Z

PDF Below...

https://drive.google.com/file/d/0B8JUL90DXgdiQlZKd29scTd0eUU/view?usp=drivesdk
Title: Re: PTU Failing??
Post by: sub_ETCS_ret on December 08, 2018, 10:04:26 AM
Quote from: SHOdded on December 08, 2018, 01:35:34 AM
2014 Taurus Front Shafts Axles R&R
Thanks!

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Title: Re: PTU Failing??
Post by: sub_ETCS_ret on December 08, 2018, 10:05:15 AM
Quote from: ZSHO on December 08, 2018, 07:53:58 AM
I'm hoping it's something simple as rust buildup around the spline and a faulty thrust washer can lead to your issues due to lack of grease inside the perimeter.  Z

PDF Below...

https://drive.google.com/file/d/0B8JUL90DXgdiQlZKd29scTd0eUU/view?usp=drivesdk
Thanks! Me too.

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