My transmission will not engage why - Does not go into gear?

I had to pull my transmission out because I did not have third or fourth gear. It just acted like it was put In neutral, so I pulled the transmission and t case and replaced my transmission and put my t case back on, And now I have no movement what so ever in any gear I put it in. I have changed out the filter and fluids in transmission and my the case, everything worked great until I pulled transmission and t case, other than the third and fourth gear, also I pulled the battery cables off and on. Did I mess something up by doing that because I have no movement what so ever in any gear? I can feel the transmission switching the gears and can feel it go in, engine even pulls down like it should from park to any gear. Oh, when I put the t case back on I did not pull the encoder motor off, did I brake that part by chance? I can clearly hear my front engage, but I cannot hear the double click that I am suppose to hear from the tccm that everyone keeps saying I would. Does that mean I need to change it out for a new one or what? My shifter on my volume shows it changes to all gears just fine, p r n d 3 2 1 am. Of them it shows on my volume that they are in that gear, I can even fill the transmission changing to the gears, but its like and feel just like my t case in stuck in neutral, it does not make any noises or any grinding, it acts like everything is just fine, but no movement in any gear, why would that be? If my t case is stuck in neutral now after changing out my transmission what do I do to get it back to two wheel drive so I have my truck back?

Just put a transmission in the truck three months ago. Was working fine, pulled out of driveway today, got maybe eighth of a mile, while shifting from second to third, transmission just stopped pulling. Will not pull in any gear. Fluid level is perfect and fluid looks shiny red like new. No symptoms of slipping or any other transmission problems. Is there anything else that would cause this besides a front pump failure?

Found the problem. The transmission people that put transmission in did not make sure the filter was seated correctly, filter fell into pan, losing suction.

My truck will shift from the column but the transmission acts like it is stuck in neutral. I checked the shift cable and replaced the neutral safety module and checked the fluids. I do not know if I need to clear the codes after I replaced the module or what.

I tried putting it in four wheel hi and it still will not move.

Is there a way to check if it is my transfer case?

Driving down the road and it just stop driving. I have no transmission gears at all and no codes.

Hello and forgive me if there is already a thread to my topic, I have looked and cannot find one exactly like mine. I bought the truck from a neighbor and it had many issues. Battery draining and overheating stalling etc. I have worked on each problem as they crop up and have had pretty good success with my repairs, and then some not so 'repaired'. After many months of repairs I got the truck road ready and it ran good, but not great. I rebuilt the TBI, replaced the TPS (which still has problems as I am about to replace it with the third one, error code 21 again but this will be mentioned again later). After clearing all my codes and running around for several weeks, the truck started to develop a thunk when I would go into gear, regardless if it was P-R / N-R or N-D. Service light came on and got code the transmission pressure switch was faulted. I ordered the switch and a new wire harness to eliminate any other switches and the trouble of going up underneath again. The 'new' wire harness I ordered was slightly different than the one in the transmission. The support holes on the new one were in different locations than the 'current' one and just removed both harnesses' contents and swapped them out, as to keep the old harness but with the new harness wiring. Replaced all the electronic parts, shift solenoids TCC the pressure switch etc. Another problem arose, the new wiring had an 'additional' solenoid and directions to the upgraded design and location. Installed everything and put it back together filled it and ran the cycles of checks before road testing. Everything was right on and running great with no codes and shifted smooth! I ran it for about three days when I got the problem. I was making a right hand merge turn and throttled up and the gears just let go. There was no sound as like a pop or bang or whine. No noticeable sound it was accelerating and I was at about 40 or 45 MPH when it felt like it went into stall like symptoms but it was still running. I gave it gas but the tachometer would rev and no power and my speed naturally, decreased and I pulled over. The truck was still running and there was no Service Engine message (yet). We checked the linkage, fine and moving the shift select; fluid- right on; leaking - none. Got it towed back and figured the transmission pump failed but wanted to make sure it was not the work I did with all the switching of electronics (minus the pressure switch). So I took out only the wiring and replaced it with the old wiring and I removed the 'extra' solenoid from the valve body. So I am back to original TCC and the wiring. The 1-2 2-3 solenoids, second to third shift, and the pressure control solenoid are still in the body. I put it back together and filled it and still, no gear in any position and no Service Engine message (yet). So I checked to see if I had pressure (just for presents not to what amount). I removed the pressure check bolt and started the truck. It blew out the tube I inserted into the port and was a huge mess. I have pressure, as to what amount not an issue so far (I think). I also removed the wire harness and started the truck, to generate an error code. Now the truck ran for about thirty to forty five seconds and a whine started to get louder and louder towards the bell housing. I shut it down and checked the fluid and it was proper. Service Engine warning came on, finally. Codes read 21- TPS and all the codes related to the disconnection of the transmission wire harness. Disconnected the battery and reconnected the transmission wire connector and cleared the codes. Restarted the engine, still no gears and the Service Engine light on again. Read code 21 only. Tried to clear again and it repeated again. I feel as I am real close to the cause but I lack the knowledge. Would someone please try to help me. Thanks! Joe

Hi Ken and thanks for the information. Could you possibly attach the parts name list, associated with the diagrams you provided? Just wondering about your answer. Would such a cause as you suggest, would that trigger a fault code? Also, what would you think is the continual reason I keep going through TPS's? I will try to upload pictures as soon as I take some. Thanks again!

My son was on his way to school one morning and the transmission poured all the fluid out of the back of it, the dipstick still reads full though. When put in gear it will not move. Any idea what might be wrong?