Ok, i did not know they were not parallel.
Im still unsure how actor correct arms will affect his steering apart from pulling the axle slightly over due to the pan hard rod. Adjustable was needed on mine to stop vehicle crabbing.
Ok, i did not know they were not parallel.
Im still unsure how actor correct arms will affect his steering apart from pulling the axle slightly over due to the pan hard rod. Adjustable was needed on mine to stop vehicle crabbing.
Carrington224
Well-Known Member
mines lifted 2", i drive it like a sports car
Not wishing to be rude here but I think you are fantacising a little.
jamesmartin
Well-Known Member
caster correction arms will reintroduce the caster angle (3 degree),lost when lifting ie rotating axle so that diff flange point more up,caster correction arms lower diff flange in effect,caster angle gives you self centering steering ,panhard rod length is a separate effect of lifting chassis away from axle ,the higher the lift the longer panhard needs to be to keep axle central ,no connection with caster angle though
jamesmartin
Well-Known Member
lowering the diffflange by correcting creates a greater angle prop has to deal with
Freelaner
Landy Driver
Would this cause premature wear of the tb uj?
DaveM-sport
Active Member
Yep, its easy to see how castor angle is reduced when front end is lifted. The length of the shock and spring height is increased. The axle is then pushed down and due to it being mounted to the chassis at the radius arms, it pivot about this point therefore rotating the axle itself the more it's dropped away from the body.
Not much but a couple of degrees in castor change can make very noticable differences in road manners, especially in turn in, stability under braking and self-centering. On BMW E30s and E36s for example the rear wishbone bush can be changed from a concentric bush to an eccentric bush. This shifts the rear of the wishbone outwards and therefore the front arm from the subframe to the hub is pushed forwards. Only is moved forward maybe an inch or so but the difference is instantly noticeable when driving it.
The castor correction arms as well as the adjustable pan-hard made a big difference to the handling of my 110. It was a little twitchy before and wandered abit under braking.
GINGE is right about castor correction arms only fixing your steering castor issues when lifted. They pull the pinion output flange back down again. This will make your prop bind quicker with the extra travel and whatever lift you have to start with when off-roading.
On the road, it has it's pros and cons.
By tilting the prop back level (or in the case of the 110s or Discoverys etc, to the angle it sits originally), it'll be back in it's correct phasing. This will reduce vibration etc.
But on the other hand, with the lift.. the prop will be rotating at a more acute angle so will be constantly putting more pressure on the UJs.
By having the lift without the correction arms, the prop will run at less of an angle so possibly less stress on UJs in that aspect but it's phasing will be out so it's possibly it'll vibrate unless it's removed and front and rear halfs put together in a different spline to be phased right for the new pinion angle.
Sorry if that's all abit confusing... it sounds right in my head but hard to describe it without a model or diagrams
Not much but a couple of degrees in castor change can make very noticable differences in road manners, especially in turn in, stability under braking and self-centering. On BMW E30s and E36s for example the rear wishbone bush can be changed from a concentric bush to an eccentric bush. This shifts the rear of the wishbone outwards and therefore the front arm from the subframe to the hub is pushed forwards. Only is moved forward maybe an inch or so but the difference is instantly noticeable when driving it.
The castor correction arms as well as the adjustable pan-hard made a big difference to the handling of my 110. It was a little twitchy before and wandered abit under braking.
GINGE is right about castor correction arms only fixing your steering castor issues when lifted. They pull the pinion output flange back down again. This will make your prop bind quicker with the extra travel and whatever lift you have to start with when off-roading.
On the road, it has it's pros and cons.
By tilting the prop back level (or in the case of the 110s or Discoverys etc, to the angle it sits originally), it'll be back in it's correct phasing. This will reduce vibration etc.
But on the other hand, with the lift.. the prop will be rotating at a more acute angle so will be constantly putting more pressure on the UJs.
By having the lift without the correction arms, the prop will run at less of an angle so possibly less stress on UJs in that aspect but it's phasing will be out so it's possibly it'll vibrate unless it's removed and front and rear halfs put together in a different spline to be phased right for the new pinion angle.
Sorry if that's all abit confusing... it sounds right in my head but hard to describe it without a model or diagrams
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I don't doubt your superior knowledge but I've never heard of it before, or rather not been informed.
Never the less, it sounds as if its minimal effect on the steering fitting castor correct arms?
jamesmartin
Well-Known Member
theyd knock to great an angle
jamesmartin
Well-Known Member
this bit ,caster is for steering ,diff flange isnt parallel and if you make it so a std prop couldnt cope
jamesmartin
Well-Known Member
if you remove the 3 degrees you have no self centering youd have to steer back from cornering ,if you ever driven a tractor with full power steering youd know what thats like
DaveM-sport
Active Member
Even most modern tractors have castor too so they even self center to an extent too.
Freelaner
Landy Driver
only reason i ask is my mates fender has eaten another one so he's thinking of fitting a double cardan.
would this be the best option?
jamesmartin
Well-Known Member
of course theyve allways had caster ,often exaggerated along with camber on 2wd, but the full power steering negates the caster and makes self centering greatly reduced at least with any ive driven
jamesmartin
Well-Known Member
yes ,cv would be even better but im not aware of an off the shelf replacement
Freelaner
Landy Driver
jamesmartin
Well-Known Member
obviously never like car ,but if maintained properly should handle quite well
