ok, this is an extremely newbie question (give me a break i'm only 18 ha ha) but what does it mean to have two transfer cases? is it like controlling both axles independently? or just i lower crawl ratio? ha ha excuse my stupid question but i'm curious

 

Technically, the term dual transfer case is incorrect. It's actually a dual reduction box.

Simply put, one puts a reduction box from one transfer case in front of another transfer case. This gives the vehicle four configurations of transfer case gearing. (High-High/High-Low/Low-High/Low-Low)

So, yes, it is for lower crawl ratio.

 

you do need an adapter. I used two 21 spline case, 23 spline are stronger. you can convert a 21 spline to 23 spline by changing the out put.
Mine is just getting finished up, but I can tell you it is kind of cool turning my input shaft 11 times and having the output shaft only turn once when in double low (2.28 front case*4.7 in rear case)

left over parts:

nice thing is that is gives you 20 forward speeds and 4 reverse, lots of options.
Roughly it runs about $1000 give or take (depending you where you get parts, etc)to get a dual case set up;
you need 2 TCs (top shift, gear driven (usually)), an adapter, crossmember, shorten rear driveshaft, lengthen front shaft

 

how would i tell if its gear driven or chain driven? i have an 88 pickup as a DD but i also have an 83 pickup as a parts truck for when i save up for my SAS, its got great drivetrain parts, except for the blown engine

 

Generally, if it's a 4cyl, it's gear driven and if it's a V6 it's chain driven. You MUST have a gear drive reduction box for the crawler, but you can mate that to either a gear drive or chain drive transfer case now that Marlin has come out with the MC10 adapter.

 

do i absoulutly need a 23 spline?

 

Not with a 4cyl if you have the low gears in the rear case.

 

exactly what they said. just remember the dumbest question is the one thats not asked

 

You can also find all this information on marlins and inchworms websites: http://www.marlinCrawler.com or

http://www.inchwormgear.com

 

Why are your transfer cases fighting anyways?

Its DUAL not DUEL...

 

damn thats a good point trusty rusty

 

excuse me again, i'm new to more modification than just lift big tires, what would be the use of this setup? i understand it helps for rockcrawling and hillclimbs? but where i live, we dont do any rocks or huge hills, just atv paths and old DCNR trails, and lots of mud cuz thats always there even tho we're in a drought most of the time... so would this help me at all? or would it just be a waste of time and money... right now tires and armor are on my agenda before anything

 

rocks and hills need low end torque, mud and ruts need horsepower and traction. dual cases equal MAJOR torque. if your're not crawling rocks, or vertical mountains, i personally would not do dual cases. i'd spend my money on some horsepower mods. small block ford for example

 

i'm actually thinkin puttin a 3.4 toy in it when i get out of basics, either that or a 4.3 chevy, i'm not a ford guy whatsoever so thats not gonna happen... i'd like to stick with toyota tho, once you put a diff brand engine in it, is it really a toyota anymore? ha ha but anyway, thanks for yall's input, it really cleared a lot up for me, THANKS A BUNCH

 

Watch the whole thing =0)
http://www.youtube.com/watch?v=JFk9yVwVLrE

 

Thats not something i would personally suggest ever doing, but thats the general idea. Super low gearing, so you can crawl over obstacles.

 

Note that he has triple 4.7's or something ridiculous in there (because he can)

 

"duel transfer cases"

I have dueling banjos in my head now.......

 

ha ha yeah, i was typin that and i new it didnt look right but i didnt remember how it was spelled ha ha

 

With regards to changing driveshaft length, I thought I read somewhere that an IFS truck/4runner could swap the rear shaft to the front, and the front to the rear...
is that right? or am I totally crazy? I've tried searching here and pirate and couldn't find it anywhere.