There are two cars. Both have automatic transmission. One has very good gas mileage. The transmission shifts gears when the engine reaches 1800 RPM, and when it does, you can't feel it. It rides very smoothly. The other car eats lots of gas. Its engine runs up to 2800 RPM before shifting gears, and when it shifts, the car jerks forward. It's not a pleasant feeling to drive this vehicle.
Is it possible to adjust the transmission on the second car to make the car more economic? I think the reason it eats so much gas is because most of the time its engine is running very fast. For example, when you drive 40 MPH, it's running at 2600RPM. There's a lot of power in this car, and I think it's just being wasted by the poor transmission. Is there anything that can be done about this?
And if yes, how? Do you have to take the transmission apart to fix this problem or what do you do?|||there are more possible answers to this question than engine and transmission combinations. So you really need to specify year make model engine and transmission for both to get any real answer. that being said transmission shift points are controlled in the valve body by either mechanical, electrical or eletro-mechanical means depending on your specific transmission. also you would need to know whether the transmission has been modified (shift kit in valve body).
add more detail and I will add info on changing for your specific car's.
Added comments:
I would start with a transmission service (flush and filter change). this transmission is controled by trans computer. it uses inputs to determine when to shift and a solenoid on transmission. a high reading from throtle posiotion sensor or low reading from speed sensor or sticking solenoid could cause this problem. as well as stick valves in valve body. not really any thing to adjust.|||for the most part considering the milage on the vehicles you may want to look into reman. transmissions most of your shift quality is with the springs used in the trans valve body.|||id take it to a qualified transmission mechanic and let him check it out,there more better to fix the problem than an average mechanic,because this is all they do ,all day long is transmissions,it does sound like it needs work done on it though,that's the best recommendation i can give you on that one,good luck with it.|||Bummer. Sounds like a piece of **** to me anyways. Just let it ride.|||differnt cars have differnt set ups..my truck runs at 2800 rpm on hyway abd my subaru 3400...differnt motor differnt shift points and rpms.
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