Transmission fluid pouring out between tranny and transfer case.

If you have the automatic trans it takes 3.8 litres of fluid if doing a service with the filter. If you drain the torque converter (usually only on a tranny swap or new install) it takes 4.7 litres if it is the 30RH tranny and 6.4 litres if it is the 32RH tranny (call the dealer with your vin number to find out which one you have).

If you have a manual trans it takes 2.3 litres.

As for the transfer case there are 4 different transfer cases used that year.

NP242 takes 1.4 litres
NP247 and NP249 take 1.6 litres
NP213 takes 1 litre

Again you can call the dealer with your vin to see what transfer case you have if you don't know.

Take the tranfer case off and you can replace that piece

It could be the rear main seal on the transmission where it mates to the motor. The motor may be burning off the leaking fluid before you can spot the leak. It could also be leaking out of the shaft seal as well, but you should be able to see tranny fluid all over the underside of the back of your car. You should be able to see it if its leaking from the rear main too, but like I said the motor could be burning it off before you spot it.

How much tranny fluid per week are we talking about? The rear main seal would require you to pull the tranny and then you pop the seal in, not too hard of a job unless you have a transfer case. Doing it in your driveway is not feasable tho because a tranny weighs a lot and I do not think you want to balance it on your chest in your driveway.

yes you do but if you only removed filter and fluid in the pan it should only be around 5 quarts. also make sure you use the right dipstick located on right side of the engine because there is one on the left side for the transfer case which takes gear lube. might want to purchase a transmission funnel makes it easier.

your output seal on the tranny or input seal on your transfer case is bad. you have to pull your transfer case to tell. this is a pretty straight forward job. block wheels. put transfer case in neutral. drop front and rear drive lines.diconnect transfer case shift linkage. there is a short commponent connecting the trans to the transfer case. the bolt on either end face each other. remove the bolts to the transmission. the transfer case is heavier than it looks, i suggest getting help. pull back on the transfer case until it will drop down. it will pull out a bit because of the trans output shaft. replace what will probibly turn out to be the tranny output shaft seal and reassemble in reverse order.

To change the transmission fluid you drop the transmission pan should be about 16 bolts. Once that is off you will see the filter. Buy the kit from a local auto parts store and look to see what the filter looks like. Check your transmission fluid once you drain to see metallic look in it if so i would suggest a transmission flush.

Sorry friend there is no adapter between the transfer-case and transmission, if your lucky it's the transfer-case that is cracked and not the transmission housing. What could cause this??? Going over something high and the transmission hitting causing the housing to crack, or a worn transmission mount. Good luck and keep me posted, be glad to know you got your Suburban running again. 

Make sure you set your parking break and block your wheels to keep the vehicle from rolling.Just drop the rear driveshaft, there are 4 bolt that connect it to the rearend and it should just slip outof the transfer case, unhook the linkage, unplug the speedometer sensor/cable, disconnect the front drive shaft I think that on this driveshaft there are four bolts that connect it to the front end and 4 connecting to the transfer case. I think that there are 4 or either 6 bolts that fasten the transfer case to the tranny once you take them off the case should just slip off. If you need to for clerance reasons you can take loose the transmission mount and remove the crossmember support and let the tranny hang down. Be carefull when you let the tranny hang down because tranny fluid will more than likely poor out so have a catch pan handy and watch it when you pull the transfer case off because your going to leak some fluid out there to and also this thing is heavier than it looks. Two people can probally handle it but I recommend using a floor jack of some sort.

So it shifts from 1st to 2nd but that is it? 3/4 clutch burned out. Check the transfer case level. If you remove the fill plug and oil pours out, the transfer case input seal is bad, the transmission oil drained back into the transfer case leaving the transmission oil level low, and then it burns out the 3/4 clutch pack. I have seen oodles of these at my shop. Very common. Someone may have added fluid to the transmission to "doctor" the problem which won't work anyway