Hey I have a 2003 Chevy s10 and the transmission is acting up on it, it only changes gears once while in drive going down the road at about 45-50 then it won't shift past that it will go to 70 and then top out when it does change the gear the one time it doesn't jerk or slip a couple people told me it could be the modulator valve but idk any ideas
My car has an automatic transmission.
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