Sorry,but i have to disagree with your answer.Please check that you are not using "regular 10w hydraulic" oil in the transmission.Because if you are you are using the wrong oil.You will have transmission and brake problems if you do.
The oil you need contains anti glazing chemicals,clutch packs and brake discs will fail (in OCDB).There is a Q8 equivalent that we use,i will get the details if required.

first daewoo dont use atf oil the red color is just an ink they use so u know if the truck have had its first service crucial on the transmission it takes a regular 10 w hydraulic , if is hydraulic powered brakes u might have a leak from the main pump front of transmisssion or seal in the hydraulic booster

It is possible that faulty brake seals are causing the oil to fill drive axle.

The transmission is pushing (ATF)Automatic Transmission Fluid out of the dipstick tube?