"Clunk" While Accelerating and Braking
#1
"Clunk" While Accelerating and Braking
So my '99 F350 4x4 is making a clunking sound and there is a distinct jolt in the truck while this is occurring.
Symptoms:
From a stop while accelerating, there is a distinct jolt and clunk. The best way I can describe the feeling is like something isn't tightened down all the way so there is a split second while inertia is generated and the "looseness" catches up to the acceleration.
When stopping, the clunk and jolt is generated when the truck comes to a complete stop. When the truck rebounds backwards a bit because of the suspension pulls it backwards after stopping, you will hear the clunk again.
I replaced the ball joints a week ago an a wheel hub bearing on the right side. I don't recall this before these repairs, but it may have been making this noise. I was more focused on the grinding from the wheel bearing so I may not have noticed the clunk and jolt then.
Any thoughts on where I should start looking for the problem?
Symptoms:
From a stop while accelerating, there is a distinct jolt and clunk. The best way I can describe the feeling is like something isn't tightened down all the way so there is a split second while inertia is generated and the "looseness" catches up to the acceleration.
When stopping, the clunk and jolt is generated when the truck comes to a complete stop. When the truck rebounds backwards a bit because of the suspension pulls it backwards after stopping, you will hear the clunk again.
I replaced the ball joints a week ago an a wheel hub bearing on the right side. I don't recall this before these repairs, but it may have been making this noise. I was more focused on the grinding from the wheel bearing so I may not have noticed the clunk and jolt then.
Any thoughts on where I should start looking for the problem?
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#9
If you're still having issues, I've had the same issue before. Started after doing work on the hubs.
Go back under the truck and retighten the caliper bolts. It seems I have to do this about 50 miles after I get the truck back on the road every time I pull the brakes.
That is why you are hearing it as the weight shifts back too, it is rotating the caliper just a hair around the hub, and it produces a thunk that you can hear and feel.
Try that, couldnt hurt to check it anyways, it takes about 2 minutes to do all 4 corners.
Go back under the truck and retighten the caliper bolts. It seems I have to do this about 50 miles after I get the truck back on the road every time I pull the brakes.
That is why you are hearing it as the weight shifts back too, it is rotating the caliper just a hair around the hub, and it produces a thunk that you can hear and feel.
Try that, couldnt hurt to check it anyways, it takes about 2 minutes to do all 4 corners.
#11
Heres the thread:
https://www.ford-trucks.com/forums/11...=droldsmorland
Some other bits of useful info here too. Scroll down to the bottom of page 1. Then the grease PN is on page 2. Yes only use the FOMOCO grease! I learned this the hard way.
https://www.ford-trucks.com/forums/11...=droldsmorland
Some other bits of useful info here too. Scroll down to the bottom of page 1. Then the grease PN is on page 2. Yes only use the FOMOCO grease! I learned this the hard way.
#13
#14
try this link or do a search under my name or "mysterious-thump....Some other bits of useful info here too. Scroll down to the bottom of page 1. Then the grease PN is on page 2. Yes only use the FOMOCO grease! I learned this the hard way.
https://www.ford-trucks.com/forums/1...=droldsmorland
https://www.ford-trucks.com/forums/1...=droldsmorland