Rear End Clunk
benswann at comcast.net
benswann at comcast.net
Fri Sep 12 03:11:19 EDT 2003
Right - I speculated similarly, checking/replacing trans. mounts and worrying
about the transmission. Several Type 44's I've had had this same annoying
clunk. If you analyse what I'm saying you'll realize that a small amount of
play/looseness in these bolts holding the subframe to the chassis results in a
lot of movement. The noise was definately induced by cceleration/deceleration
and not bumps, as you say.
It was not easy to find it either as one literally needs to be under the car
while another is bouncing up and down. As the car bounces, the wheels rotate
slightly. If you put your hands on the nuts, you can feel a small amount of
play - it is not noticable to the eye.
Check it out, at least to rule out what may be a simple fix and far less
drastic than you think.
The driveshafts do have some angular play and perhaps 15 deg. is not too far
out, I'd have to check on that, but they all do this in some degree.
If you find you need a new diff. I have one.
> thanks, but I'm pretty sure thats not the problem. I can sit under the
> car, rotate the driveshaft 15 degrees then it will "thunk". the subframe
> and diff housing don't move. The noise doesn't happen over bumps, just
> the transition from power to coasting and vice versa.
> > I'll put my odds on loose rear subframe mounting bolts. Just tighten up
> > all 4 a tad, no need to over do it. You'll know if they are loose.
> > I spent months chasing this problem on '87 5ktqa doing things like new
> > struts, camberlinks, trans mounts control arm/trap bushings, etc. and
> > each time got more frustrated when the noise did not go away. Tore the
> > inside of the car apart, and even in to the gas tank mounting - no,
> > nothing there. Got under the car while freind bounced up and down and
> > that is when the loose bolts were revealed. Easy fix that turns a car
> > that sounds like it is coming apart into one that feels like it came
> > off the factory floor.
> > Too bad the car was totaled a few months later when someone pulled in
> > front of me and now sitting in the driveway with all these new parts.
> > http://www.homestead.com/ben_swann/PearlAvant.html - yes I am trying to
> > find someone who is interested in taking this project off my hands
> > either before or after completion - 2 avants!
> > Ben
> > [My 89 200 makes the same noise. About 270k. I did
> > change the seals and goo at 180k?. My truck does the
> > same only much worse. Tranny also. Do the quat rear
> > diffs break? Anybody break one or know of someone
> > breaking one?
> > Jim Accordino]
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