Inner working of DR transmissions

[Uberoo]

One day I was bored and was surfing the web.I cam across a photoshop of a lifted saab 900 with a brush guard and a roof rack.I thought it looked cool.Although lifting a FWD is really just kinda poserish.Then I got to thinking the first gear on a non turbo saab 900 is HELLACIOUSLY low.Its low enough that I can find the steepist hill in town put it in first and maybe be going 7 MPH by the time I get down to the bottom(pisses off people behind me).Front what I know of where the diff is it would be easy to to punch a shaft out to the back.If would be simpler that way but not very practical because it would ALWAYS be in 4wd.Then I thought "what if I incorported the DR method of putting it in 4wd".So theres my question,can anyone show me a diagram or explain in detail how power gets send to the rear wheels when you put in 4wd on a DR (or even single range 4x4 for that matter)

 

I think it would be kinda cool to have a 4wd saab,would be very road warriorish.

[Uberoo]

Anyone know about other methods of figuring gear ratios?all the specs I can find for saabs is in this format 13,94 rather than 3.07

[Andy FitzGibbon]

4WD in/out is the same on single and dual range transmissions. On the aft end of the trans is the transfer box, driven by the aft end of the main shaft (the front end drives the front differential). The transfer box is an in/out box to engage or disengage power to the rear wheels.

Andy

[Gloyale]

Anyone know about other methods of figuring gear ratios?all the specs I can find for saabs is in this format 13,94 rather than 3.07

 

It's called division

 

94/13 = 7.23

 

Yikes, that is low

 

Is that the real ratio? I can't imagine a 94 tooth ring gear. It'd be 3 feet in diameter

[Uberoo]

the saab site I go on said first gear might be 4.25-4.57 depending on the year..