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Grinding Noise

Tiny
BROKEDOWN1970
  • MEMBER
  • 1994 FORD F-150
  • 4.7L
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 125,000 MILES
I hear a noise like something rubbing once in a while like metal. Then one day it sounds like the exhaust was dragging, but when I stopped to look it wasn't the exhaust. Isn't even close enough to touch anything. After I got home and backed in my driveway it had a slight jerky feeling. I can't afford a repair shop and lost my job because of it.
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Thursday, June 6th, 2019 AT 12:33 PM

27 Replies

Tiny
BROKEDOWN1970
  • MEMBER
  • 4 POSTS
Thank you. Please I need this vehicle my wife just had knee surgery and need to get back to work.
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Thursday, June 6th, 2019 AT 12:37 PM
Tiny
DANNY L
  • MECHANIC
  • 5,648 POSTS
Hello, I'm Danny.

It's hard to diagnose a sound without hearing it in person. We usually ask people to use their cell phone to make a video of sounds/noises and upload it here. Is that a possibility? Hope this helps and thanks for using 2CarPros.
Danny-
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Thursday, June 6th, 2019 AT 2:36 PM
Tiny
BROKEDOWN1970
  • MEMBER
  • 4 POSTS
No, that don't help. It runs fine it's not the motor.
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Thursday, June 6th, 2019 AT 2:52 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,256 POSTS
See if you can tell if the noise is front or back then jack the truck up and spin each wheel to see if you hear the noise here is a guide to help.

https://www.2carpros.com/articles/jack-up-and-lift-your-car-safely

Please run down this guide and report back.

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Saturday, June 8th, 2019 AT 4:15 PM
Tiny
BROKEDOWN1970
  • MEMBER
  • 4 POSTS
I was able to do a video.
Video (Click to make bigger)
Thumb
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Thursday, June 13th, 2019 AT 8:36 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,256 POSTS
The differential is junk you will need a used or rebuilt unit. Thanks for the video take the guessing out of it.
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Friday, June 14th, 2019 AT 11:33 AM
Tiny
DANNY L
  • MECHANIC
  • 5,648 POSTS
Yes, the ring and pinion is destroyed. It's possible the differential can be rebuilt/salvaged and not need an entire replacement. Thanks again for using 2CarPros.
Danny-
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Friday, June 14th, 2019 AT 2:10 PM
Tiny
VSANCI1
  • MEMBER
  • 1 POST
  • 1994 FORD F-150
  • 5.0L
  • V8
  • 2WD
  • AUTOMATIC
  • 184,000 MILES
When driving truck makes grinding noise
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Monday, June 17th, 2019 AT 10:42 AM (Merged)
Tiny
CARADIODOC
  • MECHANIC
  • 33,864 POSTS
With no other details or observations to go on, have the brakes inspected. Ford uses relatively soft metal for their brake rotors to reduce noise, so by the time you hear the brakes grinding, those rotors are usually worn down enough to require replacement.
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Monday, June 17th, 2019 AT 10:42 AM (Merged)
Tiny
SHAWN J1649
  • MEMBER
  • 4 POSTS
  • 1996 FORD F-150
  • 147,555 MILES
My truck will make a grinding noise seem to be driver front or middle sometimes starts when a bump is hit then stops when 4x4 button is pushed inside then if pressed again will stop but usually starts again I have manual lockouts that was changed from auto hubs but sometimes can drive for several miles with no noise any ideas of what the problem is or how to narrow it down
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Monday, June 17th, 2019 AT 10:43 AM (Merged)
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Have your brakes and axles checked
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Monday, June 17th, 2019 AT 10:43 AM (Merged)
Tiny
SHAWN J1649
  • MEMBER
  • 4 POSTS
Thanks a lot for your help. You think it could be a warped rotor and would it be that hard for me to do my self I have some mechanical knowledge but am no mechanic. What would I be looking for signs of wear or damage
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Monday, June 17th, 2019 AT 10:43 AM (Merged)
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
It cold be a warped rotor if you pedal feels like it's going up and down when braking. But it may be the brake pad warning making the noise as well, meaning it's time for a brake job. You can come to the site h ere and look on right hand side under repairs and it has a video on how to replacae front brake pads.
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Monday, June 17th, 2019 AT 10:43 AM (Merged)
Tiny
SHAWN J1649
  • MEMBER
  • 4 POSTS
Well I don't feel any thing in in the pedal while breaking and why would the grinding vibrating noise came and go and stop when I engage the four wheel drive I have looked at pads and there is at least half left. No squealing noise from the brake pad clip either
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Monday, June 17th, 2019 AT 10:43 AM (Merged)
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
We can't see it so we just give suggestions it could be rust hitting the rotor as well as that's quite common so check for that, then check the wheel bearings. Also if you see greas splattered all over by axle boots then replace the shafts as they have lost their lube. Easier to replace shafts than boots and repack them. It cold also be a 4wd problem. Like a transfer case. With cases like this it 's better to have a local pro look at it as they will actually hear what you have going on.
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Monday, June 17th, 2019 AT 10:43 AM (Merged)
Tiny
SHAWN J1649
  • MEMBER
  • 4 POSTS
Thanks for the help
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Monday, June 17th, 2019 AT 10:43 AM (Merged)
Tiny
KRIFFORD
  • MEMBER
  • 2 POSTS
  • 1990 FORD F-150
  • V8
  • 4WD
  • MANUAL
  • 118,875 MILES
No noises whatsoever while gettin up to 4th or overdrive, but when I brake or go round a corner and try to get back into the right gear, any gear, it grinds at me. Clutch doesn't slip or try to move the truck when standing still.
I already replaced the transmission with one out of a donor f 250 my stepdad had layin around. Same situation. Could it be the transfer case? Clutch? Gotta be somethin outside trans right? Improperly bled slave or master cylinder?
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Monday, June 17th, 2019 AT 10:43 AM (Merged)
Tiny
MATHIASO
  • MECHANIC
  • 1,209 POSTS
Noises are more complicated to diagnose.
Take your truck to an empty parking lot.
Drive in full circle( steering turned to full stop) to your right, suddently brake
drive in full circle to you left, and suddent brake
any noise?
Drive straigh and brake suddently
any noise?
Drive straight, change in all gears, any noise
notice for wich gear, you hear the noise. Or the noise in all gear?
Come back to me with what you find.

What do you mean by" clutch doesn't move the truck when standing still. "?
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Monday, June 17th, 2019 AT 10:43 AM (Merged)
Tiny
KRIFFORD
  • MEMBER
  • 2 POSTS
My truck was makin grumbly noises in 1st and 2nd. Upon inspection I found it had been leaking fluid from the concentric slave cylinder. After changing it out and bleeding the clutch, the grumbling stopped, but I started noticing that the truck didn't want to go into 3rd without grinding. I thought maybe the slave might not have been the only problem after all. But had no idea what to do about it. I drove it the way it was and it got steadily worse. By worse I mean that it started grinding whenever I tried to shift into a lower gear and it would also grind if I was traveling down hill and didn't take it out of gear. If I revved the motor the downhill grinding would stop.
Eventually the tranny gave up the ghost and just wouldn't back out of the driveway. I swapped it out with one out of my stepdads 88 f-250 which we know for a fact worked perfectly. Now that it's all swapped out and ready for the road, it's back to doin the grinding thing when I try to shift into a lower gear. Which obviously leads me to believe that it isn't the tranny, but something causing the tranny to grind.
Brake noise? Your kidding right? You just misunderstood my post?
I'm thinking misadjusted clutch pedal or faulty clutch master. But you're the experts. By "clutch doesn't move the truck when standing still" I mean that when I'm at a dead stop with the truck in gear and the clutch depressed, the clutch isn't slipping (enough?) To move the truck whatsoever.
It's been parked for a good while now and I need to get it going pretty soon cuz of the snow and hills and all.
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Monday, June 17th, 2019 AT 10:43 AM (Merged)
Tiny
MATHIASO
  • MECHANIC
  • 1,209 POSTS
Happy thanksgiving and thanks for reminding me the misunderstanding.
You will need to check the whole cluch assembly,
The clutch assembly consists of the flywheel, the clutch disc, the clutch pressure plate, the throwout bearing/clutch release bearing and fork, the hydraulic system and the pedal.
The hydraulic susyem was leaking, but you fixed that.
But sometime, one problem lead to another.
I suspect the trouwout bearing'
it transmits the movement of the clutch linkage and release fork to the pressure plate. It outer race depresses the pressure plate fingers or trust ring and rotate with the pressure plate when the the clutch pedal is depressed. This action causes the pressure plate to release it clamping force on the clutch disc. The inner race of the release bearing is pressed into a collar, wich slides back and forth over the transmission's front bearing retainer.

The clutch release bearing should be checked by turning the bearing while applying force in the direction of rotation.
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Monday, June 17th, 2019 AT 10:43 AM (Merged)

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