Are you referring to axel tramping??
I sometimes get this in 1st gear. I have never been given a straight answer as to what causes it, however, apparently it's mostly related to warn control arm bushes. Another factor is because there is no slip with a manual, the traction alterations are not disposed of. In an auto, the torque converter would absorb it.
There are a few upgrade kits on the market, I think Whiteline make some. This would probably help out.
On the other hand, my mate just imported a current model Spec R Turbo Silvia, and when we took it out for an ass whipping, it was axel tramping a fair bit.
I guess even the japs haven't figured it out yet.
Anyone else know anything about the topic?
CAUTION: Slippery When BOOSTING!