2004 chevy venture gear shift moves but transmission acts like it is in neutralhave to set park brak so van doesnt roll. makes like grinding noise when truing to shift back ino9t park

grinds? A;T BOX GRINDS IS NEVER EVER GOOD.
PARK GRINDS ONLY IF ROLLING CAR DOING SO AND IS AN ILLEAGALL ACT THAT.

WILD GUESS A/T BOX SHIFT LINKAGE IS A WRECK
ALL SELECTIONS MUST WORK
THE SERVICE MANUAL TOLD YOU TO TEST THEM ALL
PRNDL
PARK CAR DOES NOT ROLL ,HAND PUSHED
NEUTURAL CAR ROLLS PUSHED BRAKES OFF
LOW CAUSE 1ST GEAR TO MOVE CAR
rEV MAKES CAR GO REVERSE
DRIVE STARTS IN 1ST THEN 2,3,4, ETC.
ALL MUST WORK IF NOT, ALL, THE LINKAGE IS A WRECK.

Check the shift linkage for proper operation and make sure any cables are properly anchored and adjusted.

If the torque converter has no fluid inside, it may not be able to supply the power the transmission needs to shift (I don't know the details of your particular transmission, but those I've worked on needed fluid to transmit power through the torque converter at low speed or not yet moving).

Sounds like your transfer case in neutral. You have to engage the transfer case back into gear then shift selector to drive or reverse. When your transfer is in neutral the transmission will not operate. Good luck.

no the transmission shift cable is streached and needs to be adjusted. you should be able to shift the van to neutral and start it in that gear. just watch when you park because it will roll away. use parking brake. if it doent start in neutral then your cable may be snaped and not noving the gear selector on trans at all

check linkage on top of transmission and make sure it moves while engaging shift lever. You may have also left a light on while doing work on van, check all interior lights that may still be on.

Had neighbor look at this same problem. Turned out the shifter cable linkage near the top of transmission had popped off. They popped it back on and works but a bushing in the clip probably needs replaced. The neighbor rewched over engined top between firewall and engine and popped it back on.
Works fine but does needs a clip/bushing part and auto parts store has to get from Chevy

4th clutch hub splines are stripped off. GM didn't harden the splines until 2004 or so so the early model gradually wear to the point where they are so thin they strip off - and then, no 4th gear

when the trans went into park it most likley broke the small rod that engages park and unless you are a capable mechanic with a repair manual you should leave fixing that to a pro hope this helps you

Bring to tranny shop or repair shop, have it scanned for trouble codes, many electrical parts and solonoids in those trannys, possible it may just be a shift solonoid bad or needs adjustment, much cheaper than replacing tranny. good luck!