I am taking my truck in for a full billet trans upgrade this week.
All parts coming from Goerand. The work will be done by enterprizeengine
in OH. My truck is 05 reg cab 4x2. I dont tow anything. what should I
go with 89 or 91 % trans. I would like to drag now and then.

 

My opinion is 89... A little looser allows faster turbo spool. If you were towing, I'd say the opposite. I got a 91, tows terrific.

 

I am getting ready to have mine done also and I am curious as to how much it's going to cost you?

 

Go to Goerends Transmissions website, there are prices listed there. That will give you a good idea what to expect.