Thread: knocking sound front suspension

Same here , just picked up d3 with new bushes , WOW what a difference
Got rid of rattle in the back it must have transmitted through the car .

Originally Posted by LiamO

Ended up with a knocking sound coming from the right front suspension (D4) toward the end of the D3/D4/RRS 4WD Weekend in Lithgow on Sunday. No issues when back on the tarmac on the run home but knocks again when driving over small bumps/potholes.I?€™ve jacked it up but there?€™s no visible damage to the suspension/ball joints/control arm etc ?€“ any ideas?
BTW ?€“ Thank you TerryO and George for a great day around Lake Lyell

Just had mine inspected under used car warranty,,NSW,,requires both lower wishbones replaced for that same low speed knock,usually over speed humps or gutters at low speed10>15k's,,also had loose sway bar mounts,,will have some video taken by the mechanic on Monday. inner control arm bushes almost completely gone.very interesting video.
also has a knock in rear end like the diff is winding up,then a clunk noise,,,very much like the CV joints in the old Mini's.

I just had the "Hydra Bushes" done under warranty,35000km,started making noises in extended height at 27000km.
Easy way to check,put it in off-road height in a carpark and drive slowly over the larger speed humps at a 45deg angle.The short sharp speed humps didn't seen to set mine off.
I would be doing this on a monthly basis if you have warranty
Andrew

I'm booked in for inspection by the dealer in one week. Same knocking as has been reported by many and exactly as described by Andrew. Mine's at 52000km / 2yr but I started hearing the knock a bit before 50000km.

Much more noticeable at off-road height and over rough terrain.

Cheers,
Scott

Originally Posted by LRD414

I'm booked in for inspection by the dealer in one week.
Same knocking as has been reported by many and exactly as described by Andrew.

Well that was a good surprise .... both front LCA hydrolastic bushes not only diagnosed but also replaced and wheel alignment same day.
Under warranty at just over 2 years and 54,000km.
Dealer servicing often cops a lot of flak but in this case they have gone the extra mile. I was expecting a return visit for the work to be completed.

I also discussed future options with the service manager, who indicated that there are OEM sourcing alternatives he can access to bring the cost down.
I will be investigating the home bush pressing versus 2nd set of LCAs as a spare set to rotate onto the vehicle when the time comes.

And for reference, this thread has good details regarding these bushes that helped me to be well informed for this:
http://www.aulro.com/afvb/l319-disco...trol-arms.html


It might be my imagination but the vehicle feels tighter/sharper over small bumps.

Cheers,
Scott

I'm starting to wonder if they aren't strong enough,too many failing at low KM,and I know mine has done no ROUGH off-road work.
I do admit to using the accsess height on every stop,mostly whilst on the move.
Andrew

Mine lasted well over 100,000km before needing replacement. Maybe I drive like an old granny (my brake rotors and original disc pads also lasted over 100,000km).

The dealers in Perth told me that there was some movement in the LCA bushes before I went to Tassie earlier this year, but said that they would be OK until after I got back. At that time, I had not noticed any knocking / movement. In fact, the only time that I picked up on anything unusual in the front end was when driving onto the Spirit in Devonport on the way home (the ramp onto the boat is very corrugated).

After getting home, I did notice the occasional clunking over the speed humps in Bunnings car park that were not usual. I had used the vehicle with raised suspension a bit in Tassie, but no unusual noises or movement. Anyway, I had the complete lower arms replaced by the dealer at the next service after we got home (and had an oil leak from the transmission repaired at the same time) - and the only problem I've had since has been a minor coolant leak, which I fixed myself at home.

Originally Posted by BMKal

Mine lasted well over 100,000km before needing replacement.
Maybe I drive like an old granny (my brake rotors and original disc pads also lasted over 100,000km).

Have you done a lot of corrugated roads Brian? And towing?

There does seem to be a wide variance of km's achieved looking at the reports on here over many threads.
But I don't think there's a design issue. These bushes can be expected to do a lot.

Cheers,
Scott