Fixxer

Quick question, I am using a LT-1 style T56 behind a LQ4. When i did the swap, i used a 4l60 driveshaft including the yoke. I notice quite a bit of gear noise from the trans while under light coasting in all gears. Could it be because i used the auto yoke in the T56? I noticed that the auto yoke is quite a bit shorter than the T56.
Thanks,
Derek