Can not shift gears on 1997 Toyota Tacoma

When the truck is off, I can move the gear shift to any gear I want. When the engine is on, I can not shift into any gear. What is the problem ?

by in Marietta, GA on March 27, 2011
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2 answers 2 comments
ANSWER by , March 28, 2011
Check the clutch pedal and see if it is softer than normal. If it goes to the floor with little resistance there is a problem with the clutch hydralic system. If the clutch pedal has the ususl resistance the clutch disc may have damage and cause this condition.
ANSWER by , March 28, 2011
Does the transmission grind when the engine is running and you try to put it into gear?
COMMENT by , March 28, 2011
No, there is no grinding noise. If the truck is in gear when I start it, I can not get it out, or it is pretty difficult move to neutral, of that gear. If I start the truck in neutral, then I am unable to move the stick shift into any gear (i.e. reverse, first, second). I noticed that if I start the truck, in first gear, the truck tends to move forward, even though I have the clutch depressed.
COMMENT by , March 28, 2011
Most likely the clutch disk is damaged, but I have seen issues with the wrong fluid in the transmission creating hard shifting.