hey guys, so i have a Shep Stage 2 T-Case with about 2600 miles on it and 2 launches at 500hp, and a brand rebuilt trans with a 4.0 final and a Comp twin disk. But they are making this noise. not very happy, but hoping you smart guys can tell me what it is.

It whines very badly in first gear especially on decel. and after about 30mph in 2nd it goes away. it is still there on decel a little but not nearly as bad. Praying its not the t case as i just spent $2515 on it.

Here is a quick video:

 

whining in first gear is normal far as I understand...

 

First gear whine is normal. Send that video to Trevor at shep, he'll help you out.

 

You should be good. Had it always made that noise?

 

I'm not sure if it always made that noise. It came out of a buddies car. I just installed it this past weekend. But we also installed the brand new trans and built long block. His car had an open exhaust out the hood so if it did make that noise you would never be able to hear it. It's going to the DR Thursday.