Uncontrolable front shudder

[coke]

Like I said, I was fully expecting it to be a pig and drive stupid. Probably the only thing that I have left to sort out is that the shock or something is making the front end bounce occasionally. But this is nothing like shudder or the death wobbles. It is a suspension issue, not sterring related.

It might make a difference when I get the himount on the front, for a bit more weight.

Andrew

[bazzle]

Try winding the Ranchos up tight and repeat your test.

Bazzle

[coke]

I have tried the Ranchos on all settings from 1 thru 5, and it is definately stiffer on 5 (so I know the shocks are at least doing something) but I still get bounce.

Being second hand gear also, I dunno what rate the springs are but I know that the GU bar is about twice if not more heavier than my TJM steel bar. This suspension gear came off a GU remember.

i wonder if anyone knows a place that can test poundage and spring rates...

Andrew

[bazzle]

Dont need to test just post number of coils and wire and spring diameter. Easy to calculate.

Bazzle

[Fathillbilly]

through my experience

on HT to MT type tires (unless they are full of mud )

75-90 Km/h wobble vibration = bad balance

front end (steering) darting from side to side = Panard Bushes

excessive vibration from 40Km/h-up = swivel hub bearings

sloppy steering = wheel bearing, slack in steering box

a dampener is just that a dampener. it will just hide the real problem

Stu

[Robbo]

Have fitted genuine nissan panard bushes to my big balls rod & now much improved, hopfully these will last longer than previous items.

[bogged]

Have fitted genuine nissan panard bushes to my big balls rod & now much improved, hopfully these will last longer than previous items.

Have done the same, the old ones were really fubar, and the wobble at 50-60 has gone.

[tanky]

Hi,
Had the same problems, shaking around 70, after I passed the 70 it was gonne. Went to Bob J Tmart at Bondi Junction, never again, couldn't go over 60. Today I went to Chalmers tyres, they told me they have some special method to balance big tyres, they are using some kinda stud. Haven't done much of testing yet but it seems to me that shaking is gone.

[Robbo]

Goodnews is that since fitting the genuine bushes back in sept 04 & now running 36" centerpieds the only shake eyc now is only when i loose a wheel weight or 2 which after a quick static balance on the trailer hub is easy fixed. At least 5 or 6 comps since sept & steering is fine.

[Bingham]

Bloody hell shorty 40 I have never heard it happening in a stock vehicle before, that indicates to me that its not so much the mods but ware & tare on the front end. When modified all the weak points realy start to show, ie;panard bushes,cv & wheel brg adjustment,wheel bal,old steer shock,play in steer box,cruiser offset on nissans & 4 tie rod ends.
Andrew at on track has got some nissan bushes for my big balls panard rod so will try them next. One things for sure the bigger diametre tyres we us the worse it gets, fit the old outa balance 33's back on & its gone.(also looks poxy).

yes apparantly at a local mechanic they see one a week doing this and supprise supprise mine did it last week and was radius arm bushes on raddius arm where it joins the diff....... and something about pulling shims out of bearings near swivel hubs simply due to wear......
a guru who wants to make sense of my paragraph here please do....
bingham

[YankeeDave]

I've got teh wobbles too, and it's got progressivly worse over the years. Havn't tried anything to fix it yet, but getting to the point where i'm sick of gripping the streering wheel to keep the car in control.

Going to try panhard bushes and then make some drop brackets for the radius arms, and maybe rebalance my 35"s.

see if that works

[YankeeDave]

do I need any special tools to take bushes out and put in new ones?

can this be done at home, or should i use fly press at work?

[dumbdunce]

do I need any special tools to take bushes out and put in new ones?

can this be done at home, or should i use fly press at work?

the leading arm bushes need about 5 ton force to push them out, so you need a press or a big vice and a lot of patience. the panhard bushes can be done in a vice or arbor press.


the "taking the shim out" is a VERY temporary solution for wear in the knuckle trunnion bearings; the right way to fix that particular slop is to replace the knuckle bearings and re-set the preload.

[PJ]

I had a REAL BAD problem on my hands when I first hopped into my newly aquired MQ - someone had backed off almost every bolt, nut, and whatever in sight. 15 mins with a set of sockets and a couple of spanners fixed it for good.

[Cossie]

My near stock mav on 31's has had the death wobble for a while now at about 90-100, a quick peek under it the other day revealed that the radius arm bushes are shafted so hopefully thats the main cause on mine.