Clunking at 10 MPH

[BigRedWeather]

My 1997 F350 PSD 4X4 4 door 147,000 miles has run well since I got it (for 10,000 miles.) This weekend all of a sudden I hear a clunking in the area of the left front tire when the truck under no load. Sounds like you hit a heavy piece of steel with a large rubber mallet, 2-3 times per second. I replaced the mid-Shaft dirve shaft bearing because it had too much play but that didn't get rid of the noise.

I put the truck on four blocks so the wheels could spin. I could only make it make one clunk sound if I popped the clutch when it was idling. Any ways to diagnose what the problem is? Could it be the Dual Mass flywheel going bad? How can I diagnose that?

Advice would be appreciated.


BigRedWeather

 

[MPLAYER]

I don't think it is your flywheel. I have an auto and mine does it also. I'm thinking it is in the hub or wheelbearings. I would like to know if someone has figured this out too.

Mark

 

[Russ]

Frt CV joints? Does it change with the hubs locked it?

 

[Dieselpwrdredneck]

mine had a weird clunking noise, my brake caliper was loose, the pins were wearing out and it had movement up and down between the 2 brakets.

Neal

 

[MPLAYER]

I'll bet that is what it is. I'll check it out. Thanks!

 

[action4478]

Does the noise go away when you put on the brakes, or does it start when you put on the brakes?

 

[MPLAYER]

Goes away when you put on the brakes.

 

[action4478]

My guess would be brake caliper . It sounds like there may be a problem with the rotor also. If they are warped enough or enough spots where the shoes make rust spots on them, there may not be enough clearance for the pads to pass by the high spots on the rotor. Prob wore out the pins.

 

[Russ]

Ok I second the brake caliper pins. loose or worn.

 

[MUDWHISTLE]

does the rig shake when the brakes are applied at higher speeds? say 30+?