What part of the car do I use to level it for frame measurements?

morrow_jacob · Feb 4, 2015

From what I understand from a service manual, the correct way to get the measurements of the frame rails height is to have the car leveled at the two points x-6? Which would be the rear nost hole in the front rails and the second to last hole in the rear rails?

Also the torsion bars need to be level as well?

http://board.moparts.org/ubbthreads/upload2/6556156-Frame69Coronet.jpg

Or any tips on what part of the car to use as a guide for leveling the car would be appreciated.

Thanks!

Lionized · Feb 4, 2015

I've seen levels placed on the rocker panels, inside the door area.

WileERobby · Feb 4, 2015

Any frame or unibody, measuring or aligning, begins at the four control points.

Speedbird · Feb 4, 2015

I'm not sure what you are asking.
But I'm looking at your figure and when the distance from the datum line to the first X-6 is equal to the measurement from the datum line to the other X-6, the car will be "level".
Assuming your datum line is level.
If your datum line in not level the car won't be either.
The rest of the measurements should then be as per the other reference points to the datum line or something is not right with your car.
Now if your purpose is to simply level the car to a true level, I would think you should use the area between X-6 and X-6.
(Use a straight edge between the points if necessary)
Whoever drew the figure expected the datum to be level.
If I've just told the obvious and not helped, sorry.
Best I can do.

morrow_jacob · Feb 4, 2015

onlyone said:
I'm not sure what you are asking.
But I'm looking at your figure and when the distance from the datum line to the first X-6 is equal to the measurement from the datum line to the other X-6, the car will be "level".
Assuming your datum line is level.
If your datum line in not level the car won't be either.
The rest of the measurements should then be as per the other reference points to the datum line or something is not right with your car.
Now if your purpose is to simply level the car to a true level, I would think you should use the area between X-6 and X-6.
(Use a straight edge between the points if necessary)
Whoever drew the figure expected the datum to be level.
If I've just told the obvious and not helped, sorry.
Best I can do.

I've been looking at this off and on all day now, and I'm sure I've got my head wrapped around it. I've never had to do this before and I was very confused at first with what I thought I was supposed to do (level the torsion bars), then from there I got it figured out, and looking back I'm not sure what I was asking either ha.

What you said was spot on with what I have now concluded which make me feel good about it. I also had an email suggesting how to do it by making a frame jig, but I'm just not convinced at the moment it will get to that level of a build, but that may change.

Thanks for your time and reply!

rakort · Feb 4, 2015

Don't mean to crash your thread or anything, but kind of working on a similar issue. Getting ready to tear into my GTX and want to get in on a solid level platform before I start. I don't expect to be tearing into too deep but still want to start and end with a square level car.

Here is my thread

http://www.forbbodiesonly.com/mopar...rk-rear-end-of-68-GTX-best-way-to-support-car

Speedbird · Feb 5, 2015

Good deal.
You probably know that the strength of the body at mid section is in the rocker panels below your doors.
That's why people put frame connectors in and tie the frame together between the torsion bar mounting rail and the rear frame rails. (The ones that go up and over the axle.)
It reinforces that area. It appears that your jack stands are about at X-6 front and rear.
Get that leveled and go from there.

morrow_jacob · Feb 6, 2015

onlyone said:
Good deal.
You probably know that the strength of the body at mid section is in the rocker panels below your doors.
That's why people put frame connectors in and tie the frame together between the torsion bar mounting rail and the rear frame rails. (The ones that go up and over the axle.)
It reinforces that area. It appears that your jack stands are about at X-6 front and rear.
Get that leveled and go from there.

Thats the plan with the first things to get replaced and go in, a new torsion bar xmember, new floor and subframe connectors. That way I have a nice strong foundation to keep things square. If there is a need I will put bracing for panel removal. Thanks again for the help!

What part of the car do I use to level it for frame measurements?

morrow_jacob

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Lionized

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WileERobby

FBBO Gold Member

Speedbird

Bird of Pray

morrow_jacob

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rakort

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Speedbird

Bird of Pray

morrow_jacob

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