2000 explorer stalls when put into gear

ok my 2000 explorer idles fine and when I put it into gear rather reverse or drive it will stall out when you push on the gas. If you don't push on the gas it will idle just fine. I've checked the IAV, TPS, replaced the fuel dampner (fuel regulator). What I found out today is that if I put it in netural and rev the motor to anything above 1500rpm and put it in gear it will go just fine until the rpms drop below 1000 then it will stall out.

thanks for the help
rstang

Have you cleaned the throttle body valve, both sides?

yes I did. I think it has something to do with the transmission. Has anyone delt with the transmission range sensor? I had a friend hook up a code scanner and it came up with the following
P1747 Manufacture control transmission
P0743 Torque converter circuit electrical
P0750 Shift solenoid A malfunction control
P0755 Shift solenoid B malfunction control
P0760 Shift solenoid C malfunction control
P0765 Shift solenoid D malfuntion control
P1451 Aux. emission control
P0135 Bank 1 sensor 1 heater circuit malfunction
P0155 Bank 2 sensor 1 heater circuit malfunction
Does the first 6 codes have to do with the range sensor? The dealership
is of no help except they can fix it if I bring it in. Which I don't want to do because it has to be something simple.

thanks

I had a similar problem with my 93, turned out to be a bad od solenoid, apply 12vdc to the solenoids and ensure they are engaging and disengaging.