Good to see you back here and working on your Sami. I hadn't seen you one here in awhile, although I am off and on right now too with everything going on around here.
When building mine I also wanted a Daily Driver that was very capable off road. Mine also had to be extremely reliable as I always have my little one with me and I don't want to have to carry her out or have her sit in the dirt because of preventable trail side repairs.
Which YJ kit are you looking at ?
This one is pretty complete (minus the YJ springs) :
http://trailtough.com/index.php?page=shop.product_details&flypage=flypage.tpl&product_id=36&category_id=7&option=com_virtuemart&Itemid=53I haven't tried the DT3000 shocks but I do have the 8000 ones which are sold in the Trail Tough YJ kit.
What's the thinking on the using the 3000's ?
Lockers - I would suggest on a daily driver/trail rig to save up the cash and go ARB. They are completely off when you don't need them and completely locked solid when you do need them. I have tried the Detroit and the Lock-rite in mine and wish I hadn't wasted the money and went ARB in the first place.
When you do the lockers that would be the time to also do the Ring & pinion gears too. Here is an article on why a person should think about doing r&p gears when doing t-case gears :
http://trailtough.com/index.php?option=com_content&view=article&id=60:gears&catid=36:techinfo&Itemid=60Traction Bar may or may not be needed based on how you configure your YJ spring packs.
T-case - on a daily driver I tried to get the lowest amount of high range reduction and the highest amount of low range reduction. So the 6.4 t-case from Trail Tough was the key for me. I like the twisted TT pattern. Works great with zero issues for me.
The 6.4 has a 17% reduction in high range and a 181% reduction in low range.
The 6.5 has a 20% reduction in high range and a 187% reduction in low range.
The 4.89 has 18% reduction in high range and a 115% reduction in low range.
Here is a good gearing calculator to play with :
http://www.grimmjeeper.com/gears.htmlI haven't driven anything with the 1.6td engine but I do have the 1.6 16v. No issues with the 16v and mine passes smog with ease. If setup correctly you shouldn't have issues with smog.
Also some good info can be had about the specific products by calling Petroworks (not to far away in Fallbrook) or Trail Tough.
You can also get good info by emailing Petroworks.