Nocking under body

[dfpalyu]

2001 LS V8 with 86000 miles has a knocking noisethat seems to come from under the body when costing. The noise does not occure under acceleration and would go away when braking. Any ideas? I do have access to AllData info which indicates that the center bearing can be changed without to much problem.

 

[02V8Sport]

whet centre baring ar you talkinge abot?

 

[pektel]

That's what I'm wondering too. Are you talking about the joint that links the 2 piece driveshaft? Of course that's not a bearing, but if it's directly under the car... I'm just guessing.

 

[Toph69]

whet centre baring ar you talkinge abot?

Lol thats what I was thinking

 

[LS_Monk]

I have the same problem that I am trying to figure out. My knocking sound like a heavy object rolling around under the console. I only hear it when I am taking off and lasts about 2 seconds. (as if an object was in the trunk rolling around) I don't hear it in reverse. There are no vibrations up to 120mph anyways. It is really bad if I step on it from a dead stop or rolling 1-3mph. I have to replace the transmission control pack this week but I don't think it has anything to do with that. I got a check transmission light about 2 weeks ago and this problem rose about a week ago. If I take off very very slow I don't hear it. Its also no louder with the windows open.

 

[dtangerini]

I had the same problem, it is related to a front brake caliper and or the clips that are part of the assembley. They are worn out, fairly simple replacement.
The sound doe's go away while braking.