Thread: Caster question caster was out -2.7

Originally Posted by Blknight.aus

Ok to sum it up in "explain it to the boss" lingo.

your problem is that with your lift the front axle has been tilted too far forwards in turn tilting the steering pins and its playing merry hell with your steering geometry...

the concept of the fix is simple you need to tilt the steering pins of the front axle back until they are back where they were.

you have 5 options

1. cut the flanges off that mount the swivels then weld them back on in the correct place.
2. remove the mounting hardware for the axle itself and roll the whole axle back to the right position then weld it all up again
3. use a special bush in the locating arms that will tilt the axle back in about the same way as option 2
4. bend the locating arms so that they hold the axle housing in the correct orientation
5. cut off and lower the chassis side mount for the locating arms and weld them back on in a lower position

option 1 requires extensive welding skill and alignement jigs to prevent additional wear, as you dont want cutting or welding this is way out.

option 2 requires welding skill and jigs but is not quite as critical as option 1, also out as you dont want welding or cutting (and saying its not quite as critical is like saying hitting the wall at 105kph instead of 110 is better, both these options are risky for the same reasons)

option 3 is about as simple as replacing your locating arm bushes but the bushes have the center pins off center so when you put them in they cant the axle in the locating arms the trick is getting the offsets the same. This is the easiest, most reliable and repairable if you stuff it option, If you get it wrong just press the bush out and have another go, theres also bushes that have adjustable cams on the bolts.

option 4 achieves the same as option 3 but by bending the arms, easier to deal with when it comes time to replace the bushes but its got legal issues. You can get arms that are manufactured with the correct bend in them but AFAIK you still require engineer reports to fit them

option 5 is just a case of dropping the pivot point of the locating arm down by the same amount as your lift returning all the suspension geometry to the same relative starting point. this is out due to the no cutting and welding thing and you wont believe the amount of work to get the approvals for it.

that any help?

absolutely thanks mate what a great explanation

the two options that appeal to me are arms and the bushes

now arms are straight forward 3 degree or 6 degree or what ever your after QT will make them that's straight forward

but the bushes I can see them being a pain you press them in get a wheel alignment if it wrong punch them out press them in again get another wheel alignment mmmmmmm

I think the arms more appealing

Read this considering your still driving the thing and the only thing stopping you will be a major accident, a major fine and a defect notice or any other act of god


http://www.rta.nsw.gov.au/registrati...s_nov_2007.pdf


Find out if the cranked arms are legal to fit on a road going car in NSW, I may be wrong however I don't think they are, therefore the bushes may be your only feasible option.

If you haven't allready FFS, TALK TO AN ENGINEER, and remember just 1 kid, 1 cat, dog, 1 idiot cutting in front of you or braking suddenly is all it takes, you hit them, roll your (insurance and rego voided due to uncertified modifications vehicle) and you are in a whole world of hurt.

I can seriously see you spending a lot more money on your car to legally keep your lift. Like I stated to you I hope you do it, properly, there is a lot of knowledgable folk on this forum, you have chosen to ignore all the bad points all have told you and done all of the good and easy things.

Just a thought have you been through an RBT unit in your car? A cluey cop could cause a lot of crap for you if he asks to see your engineers report and notices you haven't got a modified vehicle prefix on your rego papers.

Sorry to nag, it's just you are acting like a kid ATM still driving it around and I don't think you are aware of the severity of the situation this lift you had to have has got you into, legally your car is uninsured and unregistered without a piece of paper and a signature.


And for the record yes my car has a piece of paper and an expensive rego sticker.

he did say he didnt care if it had to be trailered to where it was going.....and it would wourk out cheaper for him to do so......

what you say about legalities is correct......but i think he is simply building an off road weapon....come comp truck......

i dont think it will be on the road much longer with all the mods unless it gets engineered......

Originally Posted by DEFENDERZOOK

he did say he didnt care if it had to be trailered to where it was going.....and it would wourk out cheaper for him to do so......

what you say about legalities is correct......but i think he is simply building an off road weapon....come comp truck......

i dont think it will be on the road much longer with all the mods unless it gets engineered......

This may well be true, but Rovernit needs to be aware that most dirt tracks (such as those travelled in Twitchy's run, yesterday, require road-registered vehicles.

Maybe the PO thought he would add a sand filter to the inline filter.
Perhaps you could fill them with diatomaceous earth instead.

Regards Philip A

Originally Posted by Bushwanderer

This may well be true, but Rovernit needs to be aware that most dirt tracks (such as those travelled in Twitchy's run, yesterday, require road-registered vehicles.

FFS I can't even take my sIII or RRC upto Stockton or any of my local jaunts due to rego restrictions. Rangers work with police,as well as police patrolling bush tracks as well. Is there anywhere within a 3hr drive of Sydney (apart from private properties) that will allow the 4wding of unregoed cars? I don't think so.

If its getting trailered, who cares about caster?

Maybe the PO thought he would add a sand filter to the inline filter.
Perhaps you could fill them with diatomaceous earth instead.

whoops wrong post.
Maybe I went to sleep looking at this one.
What is it about?
You mean he didn't EXPECT to have neg caster when he lifted 4 inches?
You mean he didn't read ANYTHING about the topic before doing it?

If the axle is turned, I suggest he invests in a vastly expensive front propellor shaft with wide angle UJs, and maybe a scattershield if he retains the double cardan.
Regards Philip A