Souleyman

When I drives backward with completely turned out steering wheel on my 4x4 cossie the car shivers with the frequency seems like equal to a turn of a wheels.
I did not hear sharp sounds, but not the fact that sounds are not present absolutely in this moment.
During any drive forward there are no problems.
Is that means I have a dead front outer CV joint? Or both of them? Or something else?

COLEYST200

iTrader: (3)

If i was you i would put the car on stands and start it up and do it the same as you have just said and have a good look under the car as its running and track it down that way. Iv done this meny times with my mates escort cosworth ..BUT USE GOOD STANDS AND HAVE SOME ONE TO HELP YOU AS ALL 4 WHEELS WILL BE GOING ROUND

dojj

iTrader: (3)

it'll be the bushes as the car is designed to go round corners forwards ratehr than backwards

our buses used to do the same as everything is geared to the wheels rotating in one direction and not the other

whats happening is that the front wheels are scrubbing as they go round due to them not having the same loads on them as you get when you go forwards

so it's either the track control arm bushes, the bottom ball joints of the anti roll bar that is letting them run out of true

i don't think it's the cv joints winding up as they would probably break after a while and that would be very noticable

dojj

iTrader: (3)

there will be no loading on teh suspension mate, which is probably whats happening here putting it up in the air won't make it easier to spot

Souleyman

I think if I put the car on stands I will not give demanded loading on a suspension and, besides, wheels will sag together with shafts mate.
Or you suggest to prop up the car for levers?

Souleyman

I have a new bushes, arms and other in front suspension mate. And when I use my second RWD Scorpio I never met this. For this reason I have assumed that the problem can be in forward control details, to be exact in front cv-joints.

iansoutham

As Dojj said, it is the front wheels scrubbing against the road surface when on lock. My 4be used to do it getting on the drive. It was only noticable after I put the poly TCA bushes on as they hold the front end just that little bit tighter. All I did was to readjust the tracking slightly (very slight bit extra toe-in if I remember). It is still in spec. and does not do it any more.

Souleyman

Now I have understood, it seems to me. That is, there is no sense to worry about it? Or nevertheless it is better to check up toe-in. Recently to me did toe-in, can it is simple were mistaken at adjustment?

iansoutham

Most definitely. If set as per a 2wd model, it will be completely out, for example.

There is only about 10 minutes (1/6 degree) of adjustment tolerance on the toe alignment, so they have to be pretty precise. Mine is set slightly to the toe-in of the centre of adjustment figure.

an1mal_69

slightly off topic, but i jus got my 1st cossie. Its a 2wd stg3, however its not set-up yet as its a fresh rebuild so its running just over 1bar boost..anyways, in this damp chilly weather its no bother to light the rear wheels up, when this happens i get a judder from the back (axle tramp..??). Is this common or down to worn bushes etc..cheers, Nik

dojj

iTrader: (3)

it may be the diff and teh viscous lsd inside not playing properly, leading to the juddering

if it's coming in and out then that's one option

the others would be the diff mount, beam bushes and then, if they are originals, the rose joints/bushes in the arms

TurboShed

I wouldn't rule out the tyre rubbing on wheel arch or shock.

Souleyman

No, pal, I've checked this. Wheels are not rubbing on any parts.
Early I thought that it's a bad cv-joints but now after ideas of dojj and ianosoutham I think I need to re-check the toe-in.

dojj

iTrader: (3)

get someone to reverse the car on full lock while you watch

you will see that the bottom of the tyers will start to pull outwards and will look "tighter" on the rims than they normally would

and then, when you straighten the wheels, they will look "normal" again

Souleyman

You mean, I have no reason to worry, pal?

dojj

iTrader: (3)

you should have no reason to worry as it's more of an issue with the 4wd cars than the 2wd ones as you have different front end geometry due to the front wheels being driven as opposed to the front wheels just going round

as long as it's ok going forwards then i owuldn't be overly concerened with it doing something funny going backwards

Souleyman

Kindly thanks mate!