FJ40 Power Steering Conversion - 80 Series Power Steering Box Kit?

[pb4ugo]

@SebBuilt, how did you go about reversing the taper in your steering arms?

 

[SebBuilt]

@SebBuilt, how did you go about reversing the taper in your steering arms?

GM Tie rod end taper insert.

Machined out the steering arm to a straight bore and pressed in the TRE insert.

I believe it was from ballistic fabrication. I'll end up tig welding it in place when all is said and done!

 

[merbesfield]

Is there a difference between a 60 vs 80 series steering box’s? And where do you buy the 80 series pitman arm? I want to do this to my 1982 40 as the power steering is like driving a worn out land yacht, and yes all parts are new, it just sucks. TIA

 

[cruisermatt]

Is there a difference between a 60 vs 80 series steering box’s? And where do you buy the 80 series pitman arm? I want to do this to my 1982 40 as the power steering is like driving a worn out land yacht, and yes all parts are new, it just sucks. TIA

We make everything you need and can even do the conversion if you want @ CruiserMatt’s.. it’s the best thing you can do to one of these in my opinion.

 

[SebBuilt]

I had sag steering for years and didn't care for the "horizontal" angle. I think somewhere i read an angle like that can contribute to bump steer, but it wasn't the reason why i changed to scout steering. I built a tre over steering arm y link. It's a dana frt end, built b4 alloy birfields were available, and a 4" lift. I think you need a drop pitman arm of some sort and put the box in the conventional location for the mod. The 3rd pic in post #122 is not realistic, bolt the axle to the spring and see what happens.

When i setup my 2nd 40 for scout steering i didn't want it set it up with the one suspension in mind. Thru the years you or someone else might be using something else.

I'm theory it should definitely exaggerate bump steer by putting the drag link at compound angles. That being said it is not a given... The proof is in the driving.

I'm at a point where either option packages well.

Did you notice the bump steer with the horizontal angle that your sag steering created?
Obviously if it was that big of a problem, people would be talking about it more like @cruisermatt mentioned.


Worst case condition I showed is nowhere near what will actually happen, I agree! I just wanted to package and check clearance at worst possible condition.

I'm leaning towards the frame notch and plate may not be worth the squeeze, but not certain.

 

[cruisermatt]

The reality is you can’t really put the box anywhere else on a regular 40.

It’s completely fine. It transforms how they drive. I’ve done at least 10 of them now I think