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transmission on 2002 Chevrolet S10

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
transission will not up shift into 3rd gear unless i let off gas,also it will not down shift any answers for thses problems?
(1) Answer
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.