I did a shackle reversal on my 1980 Bj40, it's SUA, stock suspension. I also made new 3 inch longer than stock length shackles, do i need to put shims between the axle and the spring pack to correct caster?

Jason M. sent me some 4° shims, but now i'm being told by other people that shimming when you put in longer shackles isn't necessary with rear shackle front suspension?? It's only necessary with front shackle front suspension.

Help me out here, Christof

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I dare you to use the search button and find the answer to my specific question!!!

Before you go YELLING at people do your research!!

Christof

Diesel, Put a degree wheel on your pinion flange. If it is perfectly verticle then you should be okay. I do not think there was any up or downward tilt to the pinion from the factory. If it is off at all, use the shims to correct it :)

I'm sure someone will correct me if I am off on the pinion angle..

Now you can flame me for askin a dumb question!!!

What is a degree wheel, got a picture of one on the net?? Looked for it on the harbor freigth website but couldn' find it.

Sorry for this dumb question but i speak dutch and some technical english i don't understand.

Christof.

Basically it is a circular wheel that a pointer hangs from. That has a flat base. When you put it on a flat surface (like the pinion flange) it will tell you what angle it is...
Here is a picture of an angle finder...

http://www.sears.com/data/product_images/tools/standard/00939830000-dv.jpg

Thanks I'll go looking for one!

Christof

do my research? you are asking the question:rolleyes:

Before you go telling people to use the search button you should be sure that the answer to their specific question can be found that way!!

Christof " bored of being told to use the search button" Matthys

Christof,
They are called angle finders and they have a magnetic base. The caster angle is more important than the pinion angle, but as they come from the factory, the pinion angle is fixed with respect to the caster angle, so getting one right means the other one should be right too. (Unless you have bent something)

Put a straight edge on the flat machined part of the knuckle housing with the wheels straight ahead. Put the angle finder on the straight edge and read the angle. Then put the angle finder on the ground to measure the ambient angle. The knuckle angle should be at least 1 degree greater than the ground angle. Add shims to achieve at least a +1 degree caster where the front of the knuckle is tilted up compared to the back.

Of course you could also take it to an alignment shop and ask them to measure the caster.

Drink a de Konink for me :beer:
I like that Antwerp ale.

Of course you could also take it to an alignment shop and ask them to measure the caster.
HAHAHA !! that would be too easy.

Thanks for your answer, as for the konick, consider it done!!:beer: :nuke: :beer:

Christof

yes, shims, or roatating of perches, or spacers on the front of the frame are nedded, also id recommend against running shackles with any more than an inch or 2 of lift at the front, even with a shackle reversal, as this tips your pinion more and more downward, but gives better caster.....