okay so the gearbox is now flushed and working properly!
did also change oil in the transfer case and rear axle, in the front axle the oil seemed to be just fine!

it seems to be 3 problems right now with the truck;
power windows not working on any door at all
pressure sensor shows 0kpa in right front tire
and the cupé fan sounds horrible.

so we're getting there slowly but surely!

thanks for allt the useful help pedro dog and jeff!

sincerely

 

had 2 different OBD codes in the cluster panel yesterday

P-0933
P-0869

found an OBD codes list but couldnt find those 2 specific codes in that one..

http://www.ramforumz.com/showthread.php?t=42000

 

P0933 = Hydraulic Pressure Sensor Range/Performance

P0869 - Transmission Fluid Pressure High

 

where do u find the translation for that?