Pulled it all apart and everything checks out OK. Checked crank end play and it is OK also.

Anyway to determine it might be the converter without sending it off?

Any other ideas?

Thanks

72 RR, Pump gas 440, 452s, 3800 lbs, Corked, ET Radials,. 11.33@117.72. Same car, bone stock 346s, 9.5 comp, baby solid. 12.24@110.