My diff does not sit square on the chassis. Need to move it about half an inch.
Any input to correct is appreciated.
Need to max tire size.....

Loosen your body mounts and try moving the body over. Mine sits off center too, the passenger rear tire is closer to the edge than the driver's side on mine.

Dave

I when i did my resto i learned that there is a centering point that you could put a long punch through the fame and into the body right behind the driverside wheel and it helped center the body. dont know how it worked but i did it and im think im within an 1/8 or less.

Folks in another thread said to do it with adjustable upper control arms.
(I have the same problem with my 69)

Folks in another thread said to do it with adjustable upper control arms.
(I have the same problem with my 69)

Contacted fowl69 and got it thanx Dean.
Lengthening one upper control arm and shortening the other will shift the back end over. Scary geometry to be left to a chassis guy, and he can check the pinion angle again while he is at it.
I am rubbing and smoking at the big end on ther inner fender with 9" radial slicks and 8" rims. Not :cool:....especially at 135 MPH at the big end. Mallet did not help.
Want to buy some 10" rims with 5.5 inch BS and visit the chassis guy again and be done with it.
No time lately. :noway:

Folks in another thread said to do it with adjustable upper control arms.
(I have the same problem with my 69)


I dont see how the uppers can move the rear side to side. It just tilts the rear up and down. Correct me if im wrong.

I dont see how the uppers can move the rear side to side. It just tilts the rear up and down. Correct me if im wrong.

Lengthening one UCA and shortening the other by the same amount will move the differential from side to side without changing the pinion angle.

would changing the lengths of the UCAs cock the rear to the right or left. For circle track not a big issue (except if to the right :)) rather then move it the axle laterally.

Lengthening one UCA and shortening the other by the same amount will move the differential from side to side without changing the pinion angle.

Then when you put it on an alignment rack it would track like a dogs hind leg. Am i right ?

Then when you put it on an alignment rack it would track like a dogs hind leg. Am i right ?

No, the lower control arms control the tracking.

but those arent adjustable. Chris, is the body not centered or is the rear not centered to the frame?

Then when you put it on an alignment rack it would track like a dogs hind leg. Am i right ?

:noway:
I actually centered the rearend on my '70 using adjustable upper arms WHILE on an alignment rack.
My bro-in-law has a state-of-the-art Hunter, laser driven, Windows based machine that takes continous live readings.
You'd be amazed at how easy it is to do this and what little adjustment is actually needed.

Same problem.

So if my tires were too close to outside quarter on the driver side, would I lengthen the driver side and shorten the
passenger side uca's, or the opposite?

Thanks.

Same problem.

So if my tires were too close to outside quarter on the driver side, would I lengthen the driver side and shorten the
passenger side uca's, or the opposite?

Thanks.

Shorten the left (drivers side) UCA and lengthen the right (passenger side) UCA. If the pinion angle is correct make equal opposite changes. IE, lengthen one arm the same amount that you shortened the other.

:noway:
I actually centered the rearend on my '70 using adjustable upper arms WHILE on an alignment rack.
My bro-in-law has a state-of-the-art Hunter, laser driven, Windows based machine that takes continous live readings.
You'd be amazed at how easy it is to do this and what little adjustment is actually needed.

I wanna come align the elco on that!! lol

seriously do you think when I get it on the ground I can just see the alignment as it sits?

Matt

I wanna come align the elco on that!! lol

seriously do you think when I get it on the ground I can just see the alignment as it sits?

Matt,
When you're ready, we can easily trailer your Elky to Woodstock for it's initial alignment. :yes:

Thank you for the replies.
Will try and get her done next week....sounds like a piece of cake to centre the rear on the chassis.
Always figured...dah.... a solution was not there as we did try a couple years ago to shift the body over.