pops out of gear and engine revs up and slams into gear

Question

getting error codes P0705 P0740  P1750 P0700  P0141 P0740 We have replaced two shifting solinoids

Answer 1

P0705 Transmission range sensor circuit malfunction

P0740 Torque convertor clutch / circuit malfunction

P1750 Mechanical problem in hydraulic control system for A/T clutch pressure control solenoid valves A and B , or problem in the hydraulic system

What you have is a transmission flare, this is what happens when the transmission fluid is low on pressure, when the engine revs up to a higher RPM the fluid is then built up then goes in gear, Before you can go to this direction ,P0705 has to be resolved, this could set a P1750 , Correct for low transmission  fluid if low, As long as there is a P0705 the other codes could be set,

Comments

It is full of fluid.  We just changed the fluid and put in 5 quarts.  It reads full.  He has put in new torque converter.  Rebuilt the tranny. New black and brown solenoids and now a new torque converter solenoid.  Help.......

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The transmission code P0705 this is the transmission range , it is also fused protected, check the fuse for this  only in the engine compartment but also under dash, the solenoid and transmission should be okay you may just be missing power