Outer Limits 4x4 Board

I currently have a GUIV with 4" spring lift.
I had castor bushes fitted but it still wanders too much for my liking.

I am thinking now about going drop boxes, but dont want to spend extra to remove the castor bushes and refit std ones.

What problems will there be if I fit the drop boxes and leave the castor bushes in there. ie too much castor correction..

The extra castor would just mean heavier steering and more self centering???

factory jeeps run about 7°, i don't think you'll have a drama.

Do it and then get some measurements done.

It could be within limits.

If its not, you're best to put OEM slotted bushings back in.

you will have issues with the front uni joint

too much caster lead.

(draw a line through the top & bottom king pin or ball joint and then project it down to the ground. The distance from that point to where the tire actually touches the ground is called caster lead.) This is directly caused by caster angle.

If castor angle is to high it will cause death wobbles.

1.5 - 4 (max) degrees of castor we've found to be OK. but more could be bad!!

You could get the rear offset bushes rotated 180' so they don't give caster correction. The arms will sit a little bit lower but wont hurt any thing..

did caster bushes, and caster plates later on ,and left the bushes in, guess what they shake the same as not enough caster in the front

Excessive caster won't cause death wobbles unless there is another underlying problem, there are other fixable causes for wheel wobble.
It will make the steering heavy at low speeds and may put extra stress the front uni due to the angles. Don't be concerened about running a little extra, most late model vehicles run high castor for high speed stability. You are better off with stock bushes though as they offer better flexibility as they are a centred bush, they will last longer to if you use genuine ones.

Joel

What Joel said ^^^

rascal75 wrote:I currently have a GUIV with 4" spring lift.
I had castor bushes fitted but it still wanders too much for my liking.

I am thinking now about going drop boxes, but dont want to spend extra to remove the castor bushes and refit std ones.

What problems will there be if I fit the drop boxes and leave the castor bushes in there. ie too much castor correction..

The extra castor would just mean heavier steering and more self centering???

im guessing the castor bushes are the hard poly type?

if so, why the hell would you keep these in a 4x4???

Serg

Just to give an idea the v8 super cars run 20 deg castor and they are very hard to steer at low speeds with no power steer just to give you an idea.

Chad

mavzilla wrote:did caster bushes, and caster plates later on ,and left the bushes in, guess what they shake the same as not enough caster in the front

you got it..

PGS 4WD. Ever see a shoping trolley with carster slap?
I have....

PGS 4wd is right - castor alone will not cause live axle wheel wobbles.

Yom wrote:PGS 4wd is right - castor alone will not cause live axle wheel wobbles.

X3. Caster slap only occurs when the trolley wheels are loose or bent, not on new, tight trolleys.

We have death wobble problems with suzukis and while it can be effected bu caster, caster isn't the cause.

Steve.

rascal75 wrote:I currently have a GUIV with 4" spring lift.
I had castor bushes fitted but it still wanders too much for my liking.

I am thinking now about going drop boxes, but dont want to spend extra to remove the castor bushes and refit std ones.

What problems will there be if I fit the drop boxes and leave the castor bushes in there. ie too much castor correction..

The extra castor would just mean heavier steering and more self centering???

Go heaps of carster and tell us how it goes. you'll have 6-7 degrees IMHO.

bet ya it wobbles...

exV8er wrote:

rascal75 wrote:I currently have a GUIV with 4" spring lift.
I had castor bushes fitted but it still wanders too much for my liking.

I am thinking now about going drop boxes, but dont want to spend extra to remove the castor bushes and refit std ones.

What problems will there be if I fit the drop boxes and leave the castor bushes in there. ie too much castor correction..

The extra castor would just mean heavier steering and more self centering???

Go heaps of carster and tell us how it goes. you'll have 6-7 degrees IMHO.

bet ya it wobbles...

Only because patrols front end is crazy sensitive and requires someone who knows what they're doing when overhauling it and absolutely no wear/movement ANYWHERE in the linkages and bearings which is guaranteed not to exist in a vehicle thats travelled more than 100,000km on our roads IF it hasn't ever been completely overhauled with brand new components