Have an 87 silverado 5.7 4wd used for plowing. When cold, trans will go into drive and reverse,however, when warm it will not engage in either. If I let it cool down for a while, I can get it in gear.
It has a 700r4,and np208case. Any help or suggestions to point me in the right direction will be greatly appreciated.

 

Time for rebuild or replacement trans.

Sorry[sm=sorry.gif]

Bill

 

Are you sure its not the transfer case slipping into neutral?

 

dumb question, Have you checked all your fluid levels?