So I'm putting back together my truck 1998 chevy k1500 push button 4x4. need some input pleasee.... so I had a pin hole in tranny oil cooler and lost fluid didn't realize till it was to late and broke down sat for a year and now just put a new tranny oil cooler in but the 1st,2nd then 3rd cuts out does the high Rev and high rpms and won't shift to 4th what could be the solution