I cant figure it out
 

i need help my trans is acting wierd and it shouldnt be it has started this here in the past 3 weeks and only does it every once in awhile when it is cold but you will shift it into drive or rev. and it wont go no where and then outta know were it will start moving and then i will be driving down the drive way and it will stop pulling then i can shift it into park and then back to drive and it will be fine for the rest of the day. Every once in awhile i will start it after not driving it in a day or so shift into gdrive and then the motor will lope for a secondand then it will be fine and start doing what i was talking about above. what the hell is wrong with my stuff. it has a shift kit in it thats new and thats when it started taking like a second to build up trans oil pressure i think it has a billit torq converter cover sfi app. flex plate the shift kit is in it but only the things that could be done to the valve body bec. i didnt have the money to have them tare the trans appart to put a few things in the trans guy said it will be fine with just the valve body work its a transgo kit. all the stuff done to it only has about 6000 miles on it.

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It could be a number of things I would suspect the shift improver kit installation, missing check ball, loose connection to the torque converter control solenoid.We all make mistakes it maybe loosing pressure in the valve body area. take it back to the trans guy.

maybe i will check all of the eletrical connections just to make sure

Low fluid? Check that first.
KISS (keep it simple stupid)

I never thought bout checking the fluid . What would cause it to like lope it will do it once like the trans is in drive it will start rolling and then lope once then be fine my fuel and all that is good truck runs great always hasi never have any problems other than when the trans is cold or cool and hasnt been drivin in a day or so.