I am looking into building a 203/205 doubler. I have the C6 on a 6.9L diesel. I have read the tech article by BillVista and read many of the doubler questions via the search. What I am unable to find a full answer on are the following:
1) Does the 203 side maintain the High/Low option, or is it just a low range?
2) Can I run the 203 in neutral with the 205 in 2H or do I have to run both in 2H?
3) What is the advantage of triple stick shift vs dual stick shift?

I am sure I will have more questions, but the answers to the above will help me figure out which direction to go. Thanks!

1. Yes, you retain the high (1:1 ratio) and have the ability to use the low (2:1 ratio) of the 203.
2. No, if you have to 203 in neutral, there is no power being sent through. The same as neutral in any transfer case, transmission, etc.
3. With a two stick setup with the doubler, you have one stick to control the high/low of the 203 range box. The second stick will give you 2H, 4H, N, and 4L in the 205. By twin sticking the 205 (adding a third shifter) you gain the ability to shift the front and rear axles separately.

Ryan

Thank you! That helps a bunch. Explains quite a bit.