Why does right tire rub fender only in reverse? Options

[Jason74914]

I'm running 195's on my car and I did have to roll the inside lip of the rear fender for clearance. No problem moving forward, but on occasion when I'm backing up, the driver side rear tire will still rub the fender lip. I'm guessing this is just because in reverse it "torques" the tranny. (This is the second 914 I've had, and the first one did the same thing.)
Any way to fix this?
Thanks.

[DBCooper]

My bet is also suspension bushings. If moving the car by hand doesn't work you can re-create the movement. Have someone in the car put it in first gear with their right foot firmly on the brake and at a fast idle let the clutch out until it's slipping. You'll see some movement as the drive train "jacks up" against the stationary rear wheel. Then put it into reverse and do the same, you should see the tire move into contact with the fender. Don't get underneath the car or anywhere where you could be hurt, but have your friend go back and forth between first and reverse and you should be able to see what's moving and where.