My trannys makeing grinding noises carryierbearings been bad

start from furthest u joint on driveshaft (at differential) and work your way up to tranny. check u joints very carefully and thoroughly. if drive line checks out tranny or torque converter is bad. specially when rough grinding noises are heard when put into gear. cranking as you said i refer to starting engine. i assumed you meant when selecting gear with motor on. if there is a noise when you crank engine to start it, then check starter and flexplate (cracked).

Could be bad torque converter.

sounds like a bad throw out bearing you have to take the tranny out to replace it.

I doubt you going to get a code from the transmission. Im surprised that shop you have it taken to cant tell you what is the problems. If you have high miles as 100k chances are the tranny is worned and need service or replacing. Transmission rearly grind or make a grinding noise, the brakes will make the grinding noise due to the worned pad as metal rubbing on metal, have all breaks check. If the van is 5speed, yes I can see the tranny will make a grinding noise VS automatic transmission. I would take it to another shop and get another opinion or take it to the dealer which they usually charge 70-75 buck to have it diagnose. If tranny need replacing check ebay to junk yard, is lot cheaper and as good than having it rebuilt.

Would definately have nothing to due with tranny what so ever. Sounds like there is something bad in the tranny.

Sounds like the axel is not in all the way. There is a lock ring on the tranny side of the axle that needs to snap into place. Recommend pulling the axle, ensure the lock ring is in place on the axle and reinstall. Make sure the axle snaps into the tranny.

sound like internal problem like tranny oil pump gear or torque converter noises.

it sounds like the filter might not be the right one....
or the pump isnt priming.....

like "diesel mudder" said previously : was yr tranny in bad shape b4 you changed the fluid and screen?

Here is what is going on. When you push in the clutch pedal you remove the connection between the engine and the transmission. At this time all the parts in the transmission stop rotating.Since the only parts in the transmission that can rotate without moving the car are the input parts we can safely assume that the noise can only be from there.This can be a transmission input bearing. Worn Synchro mechanism (allows the transmission to shift without grinding the gears)Low fluid in the tranny. Or a bad clutch component. Top off or change the fluid. If it still makes the noise you need to take it to a tranny shop.