If you've lost all forward movement, the trans is going to have to come out anyhow. The rear clutch is fried, and all the cleaning in the world isn't going to help you get moving again. Here's the power flow:

1st. gear Drive range:
Rear clutch applied
low roller clutch applied

2nd. gear, D range:
Rear clutch applied
Front band applied

3rd. gear D range:
Rear clutch applied
Front clutch applied

Reverse:
Front clutch applied
Rear band applied

Notice the rear clutch is on in all the forward gears? If it won't move forward, the rear clutch is gone! Yank it out and get it rebuilt!
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!