Transmission will not shift into drive but all other gears are fine.

Disconnect shift cable from transmission linkage and try to manually put transmission in drive gear ( make sure wheels chocked/park brake on ). If transmission goes into drive gear, suspect a shift cable or shifter assembly problem. If you can't manually shift into drive gear by hand with cable disconnected, suspect internal transmission/shift linkage issue

i take it is a automatic check gearbox transmission fluid or the torque converter may be at fault

Yes ,you need to replace only ,after checking vacuum line that runs to it and make sure it's working correct

Drive it slowly to a reputable transmission shop. There is nothing you can fix yourself.

neither
the torque converter clutch solenoid / servo will not give any drive action if faulty
the transmission if operating fine in all gears with no noises will not need replacing
save money by going to an accredited transmission specialist shop and have the fault codes read first then replace the problem sensor , servo or solenoid

Sounds like the sensor for first gear.
The transmission comes with a shift sensor for each shift: if 4 shift, 4 sensor (including reverse).
Have somebody check the sensors and the cpu for the tranny. They go hand to hand.

First, make sure the fluid level in the transmission is topped off.
Then, if it is and still has the symptom of not shifting into drive, but all the other gears are working,

Then, I believe the transmission will require a rebuild, to replace the solenoid that is causing the transmission to not shift into Drive.

One, also, might consider getting a used transmission with low miles that has a guarantee to replace the malfunctioning transmission at a lesser cost than rebuilding the whole thing.

SOunds like the linkage needs adjusting. If it don't catch until it is in first gear, that is why it isn't shifting. Hopefully adjusting the linkage will allow it to catch in drive and then you will shift fine.

Good Luck

you have to make love to the transmission

I had the same thing! It was a computer issue. It only cost me about $35.00.