transmission on 2002 Chevrolet S10

transission will not up shift into 3rd gear unless i let off gas,also it will not down shift any answers for thses problems?

Asked by for the 2002 Chevrolet S10
When was the last time you serviced your transmission and how/what is the condition/color of your fluid? It sounds like you have a throttle pressure problem and possibly some others. Do you have a Check Engine or Service Engine Soon Light on? This can really help with pinpointing what is going with your trans.
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