Emergency !!!! about locked rear tires while driving !!!!!!!!!!

hi everyone...
i had a 03 trailblazer ltz; last week while driving low speed ( 30 hm-50 km ) ,the rear tires had locked,and sliding,but the engine didn't stop and steering wheel didn't lock.I restarted the engine but the transmission at D , it didn't work. When the transmission changed at R ,and after that at D i can drive it. Nowadays i'm hearing noise from left rear tires like turning shaft.Before that i jumped from the ramp while fast,because of that ,the sound began.After that,this issues have began.Yesterday while i'm driving at low speed it happenned again. When i pass the 30 kmh the sound are too loudly come from rear tires.I Checked that but nobody can find the issue. I check the hand brake parts,because i didn't work.but yesterday it made it again. Please help !!!!!
IS IT POSSIBLE TO BEING AFTER JUMP FROM SPEED BUMP ?? BECAUSE I PASSED IT FAST AND JUMPED. AFTER THAT,THE SOUNDS BEGAN.( I THINK IT'S LIKE A ROLLING STH. ). I USED THE CAR ABOUT 2 WEEKS AFTER THAT AND NEVER USED ABOUT TWO WEEKS. NOW I CAN DRIVE IT ,BUT SOUNDS ALWAYS THERE.LAST TIME ,I DRIVED IT ON FLAT ROAD,NO BRAKE,AND SOUNDS CAME LIKE SQUEEZING STH. AND THE TRANSMISSION NO LONGER TO BE USEFUL,BUT THE CAR CAN STILL IN IDLE ,IT NEVER STOPPED THE ENGINE AND NEVER GIVE ME AN ALERT.WHILE SLOW DOWN, I CHANGED TRANSMISSION TO PARK,AND CHANGED TO REVERSE.SO ,I CAN DRIVE IT,BUT SOUND ALWAYS THERE.THERE ARE NO OIL UNDER THE CAR.AFTER FIRST TIME THE DEALER SAID '' YOUR PROBLEM IS Parking Brake Shoe '' .BECAUSE ,Parking Brake Shoe COME AWAY FROM IT'S LOCATION. HE CORRECTED,BUT SOUNDS STILL THERE.AFTER 2 DAYS,IT MADE IT SECOND TIME .SO IT IS ON PARK NOW ....:shakehead:shakehead:shakehead:shakehead:shake head:shakehead:shakehead:shakehead:shakehead

Tough to diagnose without a road test, sounds loke you damaged something in rear differentail or transfer case, I would remove the rear diff cover and look for something broken or metal in the oil. Post back results.

last week while driving low speed ( 30 hm-50 km ) ,the rear tires had locked,and sliding,but the engine didn't stop and steering wheel didn't lock...

...Nowadays i'm hearing noise from left rear tires like turning shaft.
Defective wheel bearing???

We found the problem..It's all about rear differential..I don't know what's the meaning of this part in your language.In Turkey,it name is AYNA DİŞLİSİ,karpuz and locker are broken and plugged the differential.So they said '' You need a new box.''

Sounds mechanically accurate.

so your rear differential is damaged . the new differential will require a fluid change at 1500miles/2500KM of use. the rear cover must come off and the differential gears/box cleaned and inspected for proper operation and teeth meshing.