Frame O-Line

[Geiri]

I am wondering if there is an O-Line in the frame where it should be leveled when the car sits in all wheels?
What do you think

 

[Rustytruck]

Have you seen the frame dimensional drawings in the factory service manual?

 

[Geiri]

Have you seen the frame dimensional drawings in the factory service manual?

I have seen some frame drawings... Is the O -Line mentioned there?
I will search

 

[Rustytruck]

I haven't looked in my manuals for 20 years but I know there are frame specs there. whether they use a 0 datum line I do not know.

 

[Geiri]

I haven't looked in my manuals for 20 years but I know there are frame specs there. whether they use a 0 datum line I do not know.

Thank I did not think this existed but found it right away after your advice

 

[MarsChariot]

Yes, but I still don't think that answers your question, which I read as asking if there is some point on the frame that is parallel to the ground. That is just a drawing that by definition is mostly parallel to the ground. No where does it state that the whole assembly can't be tilted one way or another.

 

[DirtDonk]

And in the real world, whether the frame or the body, Broncos did not always sit level right from the factory. They're a truck/utility vehicle with different optional GVWR ratings and spring rates, and often sit with a rear-high rake.
Then change the weight by removing the hard top, or if you have a U13 that did not even come with a top, your level goes out the window.

If you're trying to just find a level point so you can verify the rest, then make your body level because that's how you want it, then by all means find that spot.
I gather though from your question regarding when the wheels are on the ground, then I'd have to say no, there is no zero-point.

Even if only for just that factory rake that was on some Broncos, I seriously doubt there was any point where Ford cared whether or not it sat level front-to-rear.
Where you show your level on top of the body mount is likely as perfect a reference spot as any, as the body sat pretty square/level on the frame if I'm not mistaken (which I could very well be) and that would at least give you your starting point.

Paul

 

[Artman86]

Does anybody have the measurement from the vertical datum line down to the frame at the floorboard body mount and the core support body mount. i found good diagram but doesn't have the measurements

 

[FordBronc]

All I got, hoping it helps.