this 2001 trooper is great but it drinks oil every week 1 liter only 75k can't check transmisson fluid i bought it in 04 with 28k

time to learn about what you're driving...and check that trans fluid pronto.
just click on the third thread down from the top on the trooper page for the FAQ which has a wealth of information for you, including the oilcholism and dipstickless trans fluid check

you came to a good place to start.
//bc