Hey my name is zack birge im from oklahoma and im a new member now! I got a few questions that im not to sure about!

1. What is the best tranny for me if im towing a 6k trailer with my 07 5.9 48re 4x4?

2. It seems like when my truck shifts into second the rpms shoot too high? Any idea why that is caused? I have a banks tc with the stock tranny! I also have 33,000 miles on the 07! Got the six gun with pda also.

I appreciate the help!