casperorr

I did see a thread on Gears, but I didn't find any information on my question. Could someone please give me a little help before I take my car into the shop this Friday for my gear change.

I have a 2007 Mustang GT with an Automatic transmission. I am currently running 3:31's with a C&L cold air intake and a 91 tune from Brenspeed.

I want allot more power off the line. I would really like to go with 4:10's but I am concerned that it might be running to high at RPM's while cruising on the interstate. Can someone tell me what I will be running approximately so far as RPM's with the setup of :

Automatic transmission
4:10 gears
C&L cold air intake
91 octane tune from Brenspeed
17 inch stock wheels and tires

I am mainly concerned about hurting the engine.
Any help that someone can give me would be greatly appreciated,

Thank you,
Casper

DesertMach

In my Mach on the freeway 80 mph is about 3k rpm, this in O/D of course.