In my 03 chevy truck I had to get the transmission rebuilt and it shifts fine if you leave it in drive. But if you shift it your self it will hang up in secound if you hold the gear out to long. But then if you trun the truck off it will drive rite.

 

can somebody help me with this.

 

Really hard to diagnose this without some more details. I have seen similar problems when a shift kit was added along with a pcm tune that had raised the tranny line pressure, and/or shortened the shift times, and or the addition of Vette or Billit servo. The combination of the parts and the shortened shift times can cause a shift overlap preventing the tranny from shifting.
I'd start with a line pressure check.

 

Well when i had the tranny rebuilt they told me they were having trouble gettin the line pressure rite the told me that my computer was messed up because in efans pulged into it.

 

E-fans have nothing to do with PCM tranny or engine functions. The IAT sensor in the maf does though.
This needs to be checked with a scanner. You need to know if the pcm is sending a shift command or not when it's hanging up. If the shift command is sent but the tranny doesn't shift, then it's either too much line pressure, a shift timing overlap, or a sticking solenoid. If the shift command is not sent, then it's your pcm.

Who did your tune?

 

having fans "plugged in" will not change anything. Now if you have a your computer tuned, and if the tuner bumped the line pressure up, with a shift kit, . . . then you might be having problems.


Do you have a custom tune, or a shift kit?

 

Im fixn 2 get a tune will they be able to if the line pressure is out of wak