Advice on front shackle inversion problem. (1 Viewer)

[Josie'sLandCruiser]

Hi All:

I typically post in the 40/45/55 Section, but lurk here in Hardcore.

My trail rig is a "parts rig" FJ40 registered as a '74, but with parts from other 40 Series, from 1968 through 1978, as well as some GM parts.

The front suspension is OME 1.5 inch lift springs with stock-length shackles in the factory location. When the suspension gets really twisted-up, especially when in an off-camber situation, the front shackles may invert - most often the right-side one.

Any suggestions for a "fix" to this problem?

I've posted here in "Hardcore" because many of you folks have experience with putting these rigs through more extreme stuff then the typical owner.

Thanks in advance for any help!

Regards,

Alan

 

[bustanutley]

anti-inversion shackles are the simplest solution. A better solution would be to move the shackle hangers back a bit, a longer shackle may be needed depending on how much you move em.

 

[Josie'sLandCruiser]

Hi All:

"Nutley,"

Thanks for the response!

The rig already sports OME so-called "anti-inversion" shackles . . . . .

I've considered longer front shackles, but thought they would just make the front shackle angle worse than what is already there.

Instead of moving the shackle hangers back a bit, I was thinking of using longer springs under the front of the rig. Like, 60/62 Series rear springs under the front. How does one correct the front caster, and other steering geometry after installing longer front leaf springs?

Thanks for any advice!

Regards,

Alan

 

[bustanutley]

I think your caster should stay the same, but you won't know untill you get em under the truck. Use steel caster shims to correct the issues if they arrive.