Knocking

popsrcrMember

So, something in my drivetrain is knocking, not the engine. So far it doesn't appear to be consistant.
I'm struggling to hear if it increases/decreases with speed, it isn't there at a stop.
It *seems* to go away if I brake firmly.
I had been told that the brake pads needed to be replaced, but I can't see how that would make this noise.

I did a quick look and exhaust doesn't appear to be hitting anything.

The car doesn't feel different.

I know no one can give me an answer off this thin info, but I was wondering
A - does this vaguely sound like any common problem?
B- Where would you start looking?

7/24/076:26 AM

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Original Post

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edmguru (Guest)

I may be way off here but I would check the axel flange bolts at the gearbox. Even slightly loose can cause that.
It's obviously a rotating component since it is not present when stopped and the brakes would load any slack when braking.
Like I said, I may be miles from accurate in the idea.

7/24/076:48 AM

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popsrcrMember

Great idea, thanks. I guess I should start with all the bolts, shouldn't I.

I started doing it after its first long trip.

7/24/077:19 AM

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garth66"When speed is the only thing that counts"

Also check ALL the bolts that secure your half-shafts to the transaxle flanges and the axle flanges.

7/24/0710:39 AM

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popsrcrMember

Another post will be forthcoming, as I have a new issue. However, this one is something else. When you push the car slowly, you can hear a rrrr, rrrrr, like something is binding. So, wheel bearing? Brakes again?

7/24/074:36 PM

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terryMember

Not sure if you cleared the noise issue. At one time I had the same thing happening. It would increase with speed then go away for a time, then come back. Hope your sitting down while reading this. I shot a ring gear bolt out of the bottom of the ZF case. All ten bolts had come out and were in the case when I dropped it. The ring gear didn't come off. But it could have... The noise was each both hitting before dropping to the bottom...

8/12/075:55 PM

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panteradougMember

When the u-joints are on the way out they start to bang a little. Shoot some grease in them and see if it quites down a little.

8/12/076:23 PM

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accobraMember

Pu the car up on a jack in the rear and try to figure this out before you continue driving it ..this could be an expensive problem if some thing comes loose.

My 2 cents.

8/12/077:39 PM

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popsrcrMember

Yeah, the car has been parked and I haven't gotten back to it. Gonna try and fix the electrical first so I can at least start the motor and keep it good.
Then, yeah, I'll jack the car up and and see if I can find where the noise is. Hoping it isn't the tranny, but...

8/13/076:03 PM

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