I beleive but could be wrong..
if you are doing servo and shift kit you should order Radix without the tranny tune part of superchips tuner, the combination of both makes for hard shifts in a daily driver,
blown chevy can confirm or deny that for us..
i had my tranny done after radix tune installed and was advised[by magnason] i should send my programmer back to have the tranny tune removed.
that was a hassle so i just had better hard parts, clutches and bands installed
without a shift kit. it shifts hard like that.
good luck, best upgarde you will ever buy.

 

For a heavy truck such as the AV (and my Tahoe) the Radix is the way to go. The Radix kit comes COMPLETE with everything you need. Other than the fluids you'll need to replace once installation is complete*. You'd be bolting on 100hp and off idle torque.

*Then all you need to compliment the Radix is:
Cam
Springs
Head work
Headers
Full exhaust
Gear change
Posi
Built transmission
90mm throttle body
Meth injection
And you'll be done.......until you build your forged 408

 

don't forget tuning software, hpt or efilive