Grinding of left turn acceleration
Mu truck's running an '03 crown vic front & '96 T-bird rear. Ford 300-6 and small block C-6.
If I accelerate hard while making a left turn, I get a hellacious grinding noise. Right turn is OK. Straight acceleration is OK. Left & right without gas is OK. I replaced the left front hub-no change. I replaced the left rear bearing which was lunched-no change.
Motor mounts are new and there are no marks where anything rotating is hitting anything not. Wheels do not hit. Driveshaft does not move as rear is IRS.
My thoughts are: This is an 8.8 track lock diff. Running 75-90 synthetic w/friction modifier. Are the clutches chattering and if so, then why not on right turns? 2) Is the trans cavitating? Got plenty of fluid.
If it starts to grind, I can back off & it goes away but comes back with a little gas. Help!