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You would need to align the rear if you did not properly align the sub-frame when
reinstalled. The arms are attached to the whole thing, so there is no need to
actually re-align them. What happens, is toe and thrust angle are based on
the aging of the parts. So, when you installed new bushings, the skew or yeah,
Thrust Angle will be different. If it was off, then you needed to be sure the the
subframe was straight, or at the same position as the old one, using evidence marks
where the bolts and washers were.
Even with dowel pin alignments, the holes can wear oval, the pins can bend.
So, using evidence marks is the best way to be sure it's on in the same position
it was when you removed it. If not, no biggie, you're just paying for an alignment.
As with all the other alignments, it's either negative or positive, so it was
+4 or -4.
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