This is following up from an earlier thread, I was experiencing a vibration at around 80km/h and upwards from around 95km/h in my 2001 HSE.
I finally got time to get the road wheels balanced today and it has made a noticeable difference.
The vibration has mostly disappeared up to around 95km/h, but I am still getting a lesser vibration from 95 km/h upwards.
The wheel balance has definitely made things better, but I would love to get it vibration free.
So my question is, what is a logical sequence of things to check when hunting for the culprit?
Thanks, Cheers Pete.
your half way there,had same prob in holden .
can be the tyres ,change your frounts to back n back to frount
see what does then,if tyres will notice less or more shake then through steering /than take it from there .
ps can be dented rim as well.
Thanks for the suggestions, I try swapping the front and rear wheels over on the weekend and see what happens.
I'll be very interested to know what is causing it!
I've heard of people removing the front or rear drive shaft to try and isolate a vibration, is this safe to do? The vibration only really kicks in over 95km/h.
Cheers, Pete.
I suspect that the viscous coupling can also contribute if the F/R tyre pressures are not as per LR recommendations. It's to do with wind up and proper preload on the VC.
I've recently replaced mine (totally seized) and at the same time replaced the front shaft UJs. The 95-110kmh vibration was still there, albeit significantly diminished . As I gradually increased the rear tyre pressures, left the front ones at 30 psi (cold) the vibration decreased further when I got to 38 psi (cold) for the rear...
This isn't a total answer, just adding to the "collective experience"
Thanks Hoges and Tombie2, I'll see what increasing the rear tyre pressure does.
I have no idea how old the shocks are, have not had the car that long, so it is possible they are on the way out.
They seem ok, but I also thought the shockers on my classic rangie were ok until I started getting uneven tyre wear on the front, which caused scalloping and had to replace the front tyres in the end.
Are these pics ok Tombie2?
Cheers, Pete.
Hi Pete
yep, changed it myself...see Dec19 2009 post in this (P38) section titled "Viscous coupling...vicious price"...and scroll down...details of where I bought it (4 days from UK @ less than 1/3 price locally), plus details on how I fitted it...
pm me if you want further details
OK, an update, I tried the tyre pressure adjustment suggested by Hoges and it has made a difference to the vibration, it has lessened the effect of the vibration.
I do feel it is only masking the problem though, as the vibration is still there, just less noticeable.
I have never been able to tell when shocks are worn, unless they are completely cactused, what is a good way to tell if the shocks are on the way out?
I pushed down on all 4 corners of the vehicle and the car does spring back up, then slightly down and up again.
I did the same on my classic Rangie (shocks only about a year old) and that one springs back up and stops there.
The Classic is on coils though, where the P38 is on air bags.
Any suggestions?
Thanks, Pete.
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