4Runner transmission problem

Having some issues with my transmission. Vehicle is a ’94 Toyota 4Runner automatic, 95,000 miles. Transmission appeared to start slipping in drive – intermittently, when stopped it would not move at all. Went to try it again and all was normal! With further investigation, I have full use in 4 lo-lock, nothing in 4 hi-lock. In 2wd you can feel a slight “click” when you put it in drive and it may or may not work. Flag on transmission says 30-80 LE, when I check with trans shops around here they said that was not the correct transmission for a ’94….it is the original! Transmission fluid and filter were changed about 2 months ago. Unless there is a “miracle” out there I will have to pull it, just wondering where I can get a service manual that will cover this model transmission.