Sound's Like a Sledge hammer!
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Lead Driver
Joined: Oct 2009
Posts: 5,406
Likes: 229
From: Pa
Sound's Like a Sledge hammer!
Hi folk's,
For about 2 weeks my truck sound's like someone is wailing it with a sledge hammer when turning left. Sound is coming from the back.
I jacked the rear axle up, and tried wiggling the wheels, but they are tight.
Checked the Exhaust system, tight. Checked the ball joint's, and front wheel bearings...,tight. Checked leaf springs, shocks, and bushings, they are tight.
I did find a loose U joint on the front right axle, Could that be it?
I am leaning towards a rear wheel bearing, but.....
2006 F250 Crew Cab, Short Bed, PSD.
Trac bar seems tight, steering seems tight.
I have been (not since I heard the noise) cutting and hauling firewood, and admittedly, load it good. But no worse than I ever loaded my F150's, so these loads should be child's play for this truck.
Any Idea's? Anyone else have this problem? Any Idea's what I should look at, or maybe something off the wall?
For about 2 weeks my truck sound's like someone is wailing it with a sledge hammer when turning left. Sound is coming from the back.
I jacked the rear axle up, and tried wiggling the wheels, but they are tight.
Checked the Exhaust system, tight. Checked the ball joint's, and front wheel bearings...,tight. Checked leaf springs, shocks, and bushings, they are tight.
I did find a loose U joint on the front right axle, Could that be it?
I am leaning towards a rear wheel bearing, but.....
2006 F250 Crew Cab, Short Bed, PSD.
Trac bar seems tight, steering seems tight.
I have been (not since I heard the noise) cutting and hauling firewood, and admittedly, load it good. But no worse than I ever loaded my F150's, so these loads should be child's play for this truck.
Any Idea's? Anyone else have this problem? Any Idea's what I should look at, or maybe something off the wall?
Fleet Mechanic
Joined: Jul 2005
Posts: 1,800
Likes: 52
From: Southern Colorado
Try locking the front hubs (manually) and doing u-turns on dry pavement (in 2WD) and see how bad your front u-joints really are. Also, if the noise happens at slow speeds, have someone else drive it while you stand outside and listen (in whatever 2wd/4wd mode it happens in)
Cargo Master
Joined: Feb 2011
Posts: 3,450
Likes: 13
From: Forest lake minnesota
I would see if you can pinpoint it by riding in the box and listening, if it sounds like its coming from the differential I would add some more the stuff is fairly cheap so you wont be out much to try it. Worse case scenario is your already basically worthless limited slip is a little more worthless..
Thread Starter
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Lead Driver
Joined: Oct 2009
Posts: 5,406
Likes: 229
From: Pa
Your welcome.......lol
I will buy a bottle tomorrow, and see what happens. The limited slip is pretty useless.
I will buy a bottle tomorrow, and see what happens. The limited slip is pretty useless.
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Cargo Master
Joined: Feb 2011
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From: Forest lake minnesota
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Cargo Master
Joined: Feb 2011
Posts: 3,450
Likes: 13
From: Forest lake minnesota
When you are going straight the wheels are turning at the same speed so you wouldnt notice if the clutches were locked or sticking, when you turn a corner the wheels have to turn at different speeds so the clutches need to slip. If you are sticking you will get a thumbing noise as they release and relock.
Posting Guru
Joined: Jan 2003
Posts: 2,181
Likes: 3
From: Eastern CT.
Have you changed the ATF fluid in the Transfere-case ?
Could be an issue in it,,changing the fluid is cheap ins,,,like 2 qts of atf,,and also get a look at the fluid that comes out,,,hopefully no chunks, chips and metal shavings come out !!
Could be an issue in it,,changing the fluid is cheap ins,,,like 2 qts of atf,,and also get a look at the fluid that comes out,,,hopefully no chunks, chips and metal shavings come out !!
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Lead Driver
Joined: Oct 2009
Posts: 5,406
Likes: 229
From: Pa
Well I think the rear end is dickered. Added another jug of fluid and added 10 oz of diff slip, the hammering sound calmed down a little, but there is a grinding noise yet.
When I changed it last year, I put 4 bottles in (I think they are a quart) and 8 oz of limited slip stuff. I swear I filled it till it ran out the hole. Today I added 10 oz of friction modifier, and another quart of gear lube.
How much diff fluid does it take?
It has a tiny bit of seepage on the top bolts of the cover, but not wet, and no drip's.
Think the Pig bearings are shot, or just the wheel bearings?
I will get the Transfer case tomorrow.
When I changed it last year, I put 4 bottles in (I think they are a quart) and 8 oz of limited slip stuff. I swear I filled it till it ran out the hole. Today I added 10 oz of friction modifier, and another quart of gear lube.
How much diff fluid does it take?
It has a tiny bit of seepage on the top bolts of the cover, but not wet, and no drip's.
Think the Pig bearings are shot, or just the wheel bearings?
I will get the Transfer case tomorrow.
