My transmission will not shift from 2nd to drive until the transmission is warmed up maybe 5 to 10min of driving. it shifts from 1 st to 2nd good and from drive to over drive. but 2nd to drive it hangs.
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There are shift solenoids in the transmission and apparently there's a problem them. I would get it to a trany shop and have it checked right away. If you continue to drive it you will ruin the transmission. Are sure you put the right computer in the vehicle? If you put a computer from a Bronco II with a manual trans in a vehicle with an automatic trans, the trans won't work right.
your output seal on the tranny or input seal on your transfer case is bad. you have to pull your transfer case to tell. this is a pretty straight forward job. block wheels. put transfer case in neutral. drop front and rear drive lines.diconnect transfer case shift linkage. there is a short commponent connecting the trans to the transfer case. the bolt on either end face each other. remove the bolts to the transmission. the transfer case is heavier than it looks, i suggest getting help. pull back on the transfer case until it will drop down. it will pull out a bit because of the trans output shaft. replace what will probibly turn out to be the tranny output shaft seal and reassemble in reverse order.
try shifting it manually from low,let rpms rise,then 2nd,let rpms rise,then to drive and see what happens.It could be bad drive clutches in the transmission but could be a sticky valve body in the transmission,if it does work by shifting manually add 1\2 pint of dot#3 brake fluid to the transmission fluid to assist in cleaning the pistons in the valve body and seals and to help lubricate parts and seals