1996 Geo Prizm Car jerks in hard right corners on freeway

1996 Geo Prizm Car jerks in hard right corners on freeway also on softer turns but not nearly as bad.

Only when turning Right and doing more than 35mph plus
i can take these same corners slower and not have the effect be as bad and on downward corners without acceleration at 35mph plus there is no jerk at all (which led me to believe its halfshaft related)
It kinda feels like riding a bike with a warped rim( just dont know why its only in right turns though

Heres what ive tried

Wheels are balanced no uneven tread (brand new) and wheels are round.
I havent had my alignment checked since the new halfshafts (problem did exist before they were replaced and nothing was changed on the installation)
Replaced CV halfshafts, lugnuts are all tigtened to spec new rotars and pads (were getting too thin) no play in the wheels when jacked up and torqued left -right & up -down.
had a tire with a shifted belt replaced since. Checked the bearings when i did the halfshafts.
also 2 new motor/tranny mounts (front and back left and right were taken out and checked)

All these points were also checked with a mechanic with 35 yrs experience
This is a long standing problem any help would be appreciated.