dull thumping sound

skybopper

Tremor Member
Joined
Mar 9, 2021
Messages
16
Reaction Points
46
Location
oklahoma
Current Ride
2021 F250 CG Platinum Tremor
I have a 21 platty tremor with 11K miles on it now. The truck runs and drives great, no complaints with it except that it has developed a dull thumping sound under the truck in the last couple thousand miles. I only notice it at low speeds while driving over bumps. I think its in the front end but the truck seems to transmit sounds through the frame so its hard to pinpoint exactly where the noise is coming from. I don't hear it at higher speeds but I think it's there but masked by road noise. The dealership did a quick look at the truck (whatever that's worth) at the last oil change and said everything looks good to them in the front end. Anyone else have any experience with this or know where I should look first?
 

PapaRaptor

Tremor Maniac
Joined
Jan 22, 2020
Messages
3,752
Reaction Points
9,583
Location
USA
Current Ride
6.7 F350 Tremor "Velocity" Blue Lariat Sport
Current Ride #2
7.3 F350 Iconic silver THE SILVER FOX
thats odd following.
 

ccw

Founding Member
Joined
Mar 13, 2021
Messages
2,195
Reaction Points
6,725
Location
Washington
Current Ride
2022 F-350 Tremor 7.3L
Current Ride #2
1980 Mazda RX-7
Could it be anything you have in/on the truck, like a hitch moving around?
 

BlueKilla

QAnon Police
Joined
Jun 19, 2021
Messages
1,293
Reaction Points
4,188
Location
Michigan
Current Ride
2022 F250 Lariat Tremor
Check your front end components while the front of the truck is raised for excessive play and make sure the fasteners are tight.
 

PolarBear

Tremor Member
Joined
Aug 27, 2021
Messages
17
Reaction Points
58
Location
Tuktoyaktuk, NT Canada
Current Ride
F250 Lariat with Blackout pkg 7.3L
I have a 21 platty tremor with 11K miles on it now. The truck runs and drives great, no complaints with it except that it has developed a dull thumping sound under the truck in the last couple thousand miles. I only notice it at low speeds while driving over bumps. I think its in the front end but the truck seems to transmit sounds through the frame so its hard to pinpoint exactly where the noise is coming from. I don't hear it at higher speeds but I think it's there but masked by road noise. The dealership did a quick look at the truck (whatever that's worth) at the last oil change and said everything looks good to them in the front end. Anyone else have any experience with this or know where I should look first?
Weird
 

RydVT

Tremor Newbie
Joined
Sep 30, 2021
Messages
3
Reaction Points
3
Location
Atlantic Highlands, NJ
Current Ride
2021 F-250 Tremor PSD Carbonized Gray
Current Ride #2
1984 CJ-7
I have the same “dull thumping sound” on my ‘21 F-250 lariat Powerstroke. I only get it at low speeds, in forward or reverse, usually off pavement at a job site or lumber yard. Cannot figure it out. Removed hitch, tightened down loose driver side battery…still no luck
 

strogg

Watch out for this guy
Joined
Oct 31, 2020
Messages
402
Reaction Points
1,340
Location
North DFW
Current Ride
2020 F250 Lariat Tremor
Current Ride #2
2001 Ford Excursion, 2010 Ford Focus
Can you replicate the sound by jumping on the running board while it's parked? If so, have someone underneath the truck to see what could be making the sound. If it's while driving only, maybe you can borrow a GoPro if you can't find a volunteer to be under the vehicle while it's in motion.
 

RydVT

Tremor Newbie
Joined
Sep 30, 2021
Messages
3
Reaction Points
3
Location
Atlantic Highlands, NJ
Current Ride
2021 F-250 Tremor PSD Carbonized Gray
Current Ride #2
1984 CJ-7
I took these videos a couple days ago, the sound is almost inaudible… reminded me of my 2011 F-350 PSD when the body mounts started to go…
 

Attachments

  • IMG_4678.MOV
    13.2 MB · Views: 0
  • IMG_4677.MOV
    18.7 MB · Views: 0

LT75

Founding Member
Joined
Jan 21, 2021
Messages
669
Reaction Points
1,288
Location
Saint Charles, IL.
Current Ride
2021 F250 Tremor lithium grey
I have the same “dull thumping sound” on my ‘21 F-250 lariat Powerstroke. I only get it at low speeds, in forward or reverse, usually off pavement at a job site or lumber yard. Cannot figure it out. Removed hitch, tightened down loose driver side battery…still no luck
I have the same on my 7.3. It’s frustrating me because I can’t pinpoint it. I only hear it at low speed forward and reverse. Most of the time it’s when turning while on uneven pavement. But sometimes while steering side to side when the truck leans. i went underneath to shake and pull on everything to make sure it’s tight.

maybe I’ll disconnect the sway bar to see if the sound is radiating from the rear.
 

gommer

Tremor Fan
Joined
Aug 31, 2021
Messages
40
Reaction Points
151
Location
Rogers, AR
Current Ride
2020 Ram 1500
Slide under your truck and give your driveshaft a good push and yank and see if you've got wobble. Sounds like a joint in there may be loose. It's not uncommon to have a damaged/broken joint that permits some sliding when gravity does it's thing. At a certain point centrifugal force will overcome gravity and the shaft will no longer slip so the noise will go away.

Happens a lot on jeeps with oversized tires that are underaxled/shafted. Not saying I've done that, you can't prove anything.
 

LT75

Founding Member
Joined
Jan 21, 2021
Messages
669
Reaction Points
1,288
Location
Saint Charles, IL.
Current Ride
2021 F250 Tremor lithium grey
So I went to the dealer today for them to look at it. I forced them to do a ride along with me instead of waiting for them to take it by themselves and say they don’t hear anything. I replicated the sound and found out that it rarely happens after 20 mph. They tried to tell me it’s the ball joints from my 1 1/2 inch puck under the springs. I said if that was the case you’d hear it all day long, not just low speed. I can jump up and down on the front end but you hear nothing. I also informed them that they installed the lift.

Then they tried to blame it on my ATS steering stabilizer. I’m gonna go out later and adjust it to make sure the fox ATS reservoir is not hitting anything. I have to bring it back from December 6 and they’re gonna keep for two days to look at it.

I can’t stand it when dealerships try to blame everything else.
 

Vermonster

Founding Member
Joined
Jan 23, 2021
Messages
1,608
Reaction Points
6,671
Location
Vermont
Current Ride
2011 BMW E90 335i XDrive
Current Ride #2
1974 BMW 2002 (building project), 2021 Subaru Ascent (Wife's car), Ducati 899 & Ducati 748 Mono
I had bushings sound like that on a different vehicle (3/4 GM Platform). I added some grease and it stopped. I have no idea if this could be similar, but just to toss an idea out there.
 
  • Like
Reactions: ccw

gommer

Tremor Fan
Joined
Aug 31, 2021
Messages
40
Reaction Points
151
Location
Rogers, AR
Current Ride
2020 Ram 1500
Is it a consistent noise, eg it has a rhythm, or is it more sporadic?

Have you done anything to try and reproduce it by means other than driving it? (EG lifted it and turned the wheels by hand?)
 

LT75

Founding Member
Joined
Jan 21, 2021
Messages
669
Reaction Points
1,288
Location
Saint Charles, IL.
Current Ride
2021 F250 Tremor lithium grey
Is it a consistent noise, eg it has a rhythm, or is it more sporadic?

Have you done anything to try and reproduce it by means other than driving it? (EG lifted it and turned the wheels by hand?)
Sporadic. Something is banging. I can feel it in my foot sometimes. I just rotated the stabilizer reservoir so I’ll test it out. I noticed the one of the front spring perches is rotated 180 degrees the opposite way. Don’t know if that’s right or not. I have to research that.
 
OP
S

skybopper

Tremor Member
Joined
Mar 9, 2021
Messages
16
Reaction Points
46
Location
oklahoma
Current Ride
2021 F250 CG Platinum Tremor
So I went to the dealer today for them to look at it. I forced them to do a ride along with me instead of waiting for them to take it by themselves and say they don’t hear anything. I replicated the sound and found out that it rarely happens after 20 mph. They tried to tell me it’s the ball joints from my 1 1/2 inch puck under the springs. I said if that was the case you’d hear it all day long, not just low speed. I can jump up and down on the front end but you hear nothing. I also informed them that they installed the lift.

Then they tried to blame it on my ATS steering stabilizer. I’m gonna go out later and adjust it to make sure the fox ATS reservoir is not hitting anything. I have to bring it back from December 6 and they’re gonna keep for two days to look at it.

I can’t stand it when dealerships try to blame everything else.
My truck is completely stock and makes the same sound. I hope they get yours figured out!
 
Ford Tremor Supporting Member Badge
Top