Turn the screw inside clockwise to make the shifts later, turn it counter clockwise to make the shifts sooner.
Be very unlikely the transmission would shift if the vacuum line is bad. If it shifts at all it will be very late and harsh.
There's also a chance you may be taking off in second gear. But I think you would notice that because the engine would have to work a bit harder to take off.
Your rpm readings look like it is in high gear.
Would help to know more about the vehicle, year model, rear end gear ratio.
Last edited by Roy Rodgers; 01/08/2013 10:14 PM.
