i want to run a dual stick setup from marlin crawler(they are out of stock right now) it got me thinking about all the people saying they have 15 or 20 speed transmissions when they run the dual case. my question is can i run the low 4 in any gear or can i only run it in first?

 

you have any gearing you want.

you have the 5 forward gears and 1 reverse in 2hi. you have 5 forward gears and 1 reverse running in 4-lo, 5 forward and 1 reverse in double low, and 5 forward and 1 reverse in trip low (if you do dual ultimate crawler setup)

So that 20 forward gears, 4 reverse gears.. Its all about the gearing..

 

so by referring to a dual stick set up it sounds to me that you are referring to a twinstick which will allow you to have 2WD high and low range and 4WD high/low range.
advantage is that if you have a locker up front you can disengage 4WD when you bind an axle and prevent breakage:

a twin stick set up will not give you any more gear selection with out adding a TC

Dual transfer cases will net you 20 forward and 4 reverse (mine is twinsticks with 4.7 gears in the rear case and stock 2.28 in the front case) 220:1 double low range:


and some folks go dual transmissions:
http://pirate4x4.com/forum/showthread.php?t=698521

 

alright thanks, i just wanted to know if i could run the t/c low gears throught all the transmission gears, thanks

 

THATS FREAKING AWESOME !