47rh lock up
 

i have a 94 dodge 2500 and all gears shifts fine and the converter locks but it only drops like 100 rpms when it locks any ideas i have lock switch and it still only drops 100rpms with it. If your rollin 55 with switch locked it jumps up to 2200rpms and speed climbs like it would unlocked but if i let off rpms stay high and slow me down so iknow its still locked and if you stop instead of killing truck it shifts down with switch on any ideas?:argh: