This is an original Hemi car. All stock suspension. I bought the car in 1978, and the car had been parked for awhile before that. It only had 27,000 miles. So I have had this problem since 1980 when the car was put back on the road.
Where should you check off of on the transmission??
The springs, after sitting for a while developed
sag or a "set" in them. I guess that the car was
not raised on jackstands to allow the springs to "keep" it's natural arch. Hemicars, have torque boxes at the front spring eye mounts. Check to be sure, sometimes Magnum models get a
Hemi swapped in them and are passed off as such.
No insult, just be sure. The HEMI or XHD springs
are great springs for the street, great ride comfort and adequate traction with a pinion snubber set right. Can NEVER beat a good set of superstock springs or caltracs for strip use!!
To set the angle at the transmission, measure the
angle of the yoke (rear of tranny/driveshaft). It should be
2.5 degrees or less, BUT NEVER ZERO DEGREES. Once
you have that setting, you can set the pinion angle carefully. It would be BEST to do these settings on a drive-on lift or alignment rack, if you can. Mopar Performance sells the spring (wedgees) shims to set up to approximately
10 degrees. Its is NOT recommended to exceed this setting for the street. 3-8 degrees is a wide enough range to work with (engine power/car weight/age and other chassis mods depending). Food
for thought
! BTW, Hemi, big block or high
winding smallblock in a car that sat, do yourself a justice, CHANGE the rear springs!!
. After all of these changes could this all be caused by the pinion angle? The only thing that I don't believe has been changed is the rear leaf springs.
Note: HEMIS (all trans) and 440-6pack (all trans)440 Magnum (4speed ONLY w/DANA) use the SAME XHD spring. ALL 340, 360 HP, 383-400-440 Magnum engines (440's w/auto and 8-3/4 or DANA rears) use the "standard" HD spring. 