Question about 2000 Toyota Tundra

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The transmission is shifting hard into overdriveat low and high speeds check engine light is on running bad

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Hi there lov2trk. The first thing you need to do is take your truck to a auto parts store like NAPA or autozone to have the trouble code from the check engine light read. The large chain parts stores will read the codes for free. It sounds like you have some solenoid issues.

Posted on Apr 08, 2011

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2000 tundra 4x4 4.7 automatic transmission just rebuilt with new converter,& vale body. shifts hard a 30 to 40 mph its driving me crasy cant find why it's doing it. help

Posted on Dec 07, 2012

  • james Dec 07, 2012

    Help have 2000 tundra 4x4 4.7 at 30 to 40 mph shift hard. cant find why it's doing it. transmission was just rebuilt with new vaul body & torc convertor.

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First thing is u need to have codes pulled from ur vehicle computer,to illustrate which areas in ur system have issues. no need to go hunting,wen u have a computer waiting to comunicate issues directlty affecting ur vehicles performance with easy to read diagnostic codes

Posted on Apr 08, 2011

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1 Answer

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Vehicle Speed Sensor The vehicle speed sensor (VSS) (Figure 42) is a variable reluctance or Hall-effect sensor that generates a waveform with a frequency that is proportional to the speed of the vehicle. If the vehicle is moving at a relatively low velocity, the sensor produces a signal with a low frequency. As the vehicle velocity increases, the sensor generates a signal with a higher frequency. The PCM uses the frequency signal generated by the VSS (and other inputs) to control such parameters as fuel injection, ignition control, transmission/transaxle shift scheduling and torque converter clutch scheduling.
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Vehicle Speed Sensor The vehicle speed sensor (VSS) (Figure 42) is a variable reluctance or Hall-effect sensor that generates a waveform with a frequency that is proportional to the speed of the vehicle. If the vehicle is moving at a relatively low velocity, the sensor produces a signal with a low frequency. As the vehicle velocity increases, the sensor generates a signal with a higher frequency. The PCM uses the frequency signal generated by the VSS (and other inputs) to control such parameters as fuel injection, ignition control, transmission/transaxle shift scheduling and torque converter clutch scheduling.

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Some trans use an OSS, Output Shaft Sensor instead of a VSS. Depends on which trans you have, 4R100 or 4R70W

Transmission Control Switch (TCS) and Transmission Control Indicator Lamp (TCIL)
The transmission control switch (TCS) is a momentary contact switch. When the switch is pressed, a signal is sent to the powertrain control module (PCM) to allow automatic shifts from first through fourth gears or first through third gears only. The PCM energizes the transmission control indicator lamp (TCIL) when the switch is off.

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