3degree castor bushes or 5degree castor plates?

Submitted: Tuesday, Sep 27, 2005 at 20:37

ThreadID: 26815 Views:4247 Replies:4 FollowUps:4

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udm

Hi, I lifted the 80series by 4", so now I have to find out how far the castor is... I got it checked at JAX (tyre shop), and the new castor values are -4.35degree... then I went to a 4x4 suspension place and was told to fit 5degree castor plates, and then at another 4x4 suspension place was told that 5degree plates is to much and should use 3degree bushes, I personally prefer the plates. Plates and bushes nearly cost the same, it[s only up to deciding what to use.
To the question, what are you guys using and how do you find the drivability of the cars?

Ulises

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Reply By: BenSpoon - Tuesday, Sep 27, 2005 at 20:44

Tuesday, Sep 27, 2005 at 20:44

I need to do the same myself and have been looking at getting plates. I recall they can be drilled out again, meaning if you do go for a bigger lift you dont have to fork your cash all over again.
When comparing the two, It think the plates gave slightly higher clearance, but I didnt see them on side by side so cant say for sure. I'll be keen to see what comes up here.

AnswerID: 132049

Follow Up By: gqpat - Tuesday, Sep 27, 2005 at 22:35

Tuesday, Sep 27, 2005 at 22:35

i would think if you had -4.3 caster you would want 5 deg plates .Even if you over compensated with caster the vehicle will only want to centre itself easier .
Most vehicles these days run up to 4 deg + caster this stops them jumping all over the road over bumps etc.

FollowupID: 386381

Reply By: Rock Crawler - Wednesday, Sep 28, 2005 at 06:01

Wednesday, Sep 28, 2005 at 06:01

I have a 5" lift im my cruiser and with 3 deg correction bushes she drives straight as.

Ironman have a new adjustable set up , but not sure if its on the market , you will have to ask ads about that one

AnswerID: 132111

Reply By: Member - DOZER- Wednesday, Sep 28, 2005 at 09:10

Wednesday, Sep 28, 2005 at 09:10

Ulisies
Plates are the go. You end up with better articulation keeping the rubber bushes, the bushes are neoprene and have been known to crack diff mounts.
Having said all this...if you put 5 degree plates on yours, you will end up with -1/2 which doesnt leave much sagging before you end up with 0 and 0 is what you need to stay away from.
Thats probably why others have suggested 3 degree bushes... Try the plates and see...you can always put spacers under the springs if it sags :-)))
Now, you will need to go part time or get a double Cardon front shaft...when you correct the caster, the front shaft will start vibrating....even if you dont have the hubs in.......
Andrew

AnswerID: 132130

Follow Up By: udm - Wednesday, Sep 28, 2005 at 16:13

Wednesday, Sep 28, 2005 at 16:13

Andrew, I[ve already got the driveshaft vibration, wasn[t sure if it was front or rear shaft though.
Ulises

FollowupID: 386442

Follow Up By: udm - Wednesday, Sep 28, 2005 at 20:48

Wednesday, Sep 28, 2005 at 20:48

Yep, just got the front driveshaft off, and... no vibrations anymore. I still haven[t corrected castor, will the vibration still be there after been corrected?
Ulises

FollowupID: 386485

Follow Up By: Member - DOZER- Friday, Sep 30, 2005 at 16:27

Friday, Sep 30, 2005 at 16:27

It wll get alot worserer...enought to make you leave the shaft at home...if you have a look at the shaft in situ now, the diff uni will be dead straight after the correction....You will also have some problems with the springs hitting the bumpstops as they move....another way to mod the fromt is to flip the control arms to the top of the diff....have a search through outerlimits for this mod....new plates can be bought pre fabbed, this mod moves the diff forward to where it would be if it were standard height, so big tyres dont rip the mudflaps off anymore :-))
Andrew

FollowupID: 386841