is ur car shifting erratically or hVING gear troubles?..before u shell out ur hard earned dough...consider the parts below..they are part of the transmiison



Control Modules (Electrical): Engine (ECM) / Powertrain (PCM), Body (BCM), Automatic Transmission (TCM), and/or other control modules (some new vehicles have more than ten) use input from sensors such as those below to control shift timing and shift feel. When the responsible control module stops working, the transmission may stop shifting, shift harsh or soft, or catastrophically fail.

Mass Airflow Sensor (Emission), Throttle Position Sensor (Fuel/Air), and Manifold Absolute Pressure Sensor (Fuel/Air): The Mass Airflow Sensor (MAF) measures the mass flow-rate of air entering the engine. The Throttle Position Sensor (TPS) measures the position of the throttle (gas pedal). The Manifold Pressure Sensor (MAP) measures pressure in the intake manifold. Data from all three sensors can be used to determine engine load. A failed MAF, TPS or MAP can cause late-harsh shifts, early-soft shifts, or the transmission may stop shifting completely.

Air Temperature Sensor (Emission): The temperature of the air entering the engine intake is used to adjust the fuel/air mixture and transmission fluid pressure. A failed intake Air Temperature Sensor may cause the transmission to shift harder than normal.

Air Conditioner Relay (Electrical-Switch & Relay): The Air Conditioner Relay/Sensor indicates when the AC is on or off. This is used to adjust engine speed (RPM). A failed AC Relay may cause engine lugging or other driveability problems that may seem transmission related.

Temperature Sender / Sensor (Cooling System and Transmission-Automatic): The Coolant Temperature Sensor and/or Transmission Oil Temperature Sensor prevents the converter clutch from putting the transmission into overdrive when the engine and transmission are too cold. On some cars, other gears may also be inhibited. These sensors are likely to become even more important as more gears are added to new cars with higher fuel economy requirements. Without correct temperature data there may be late shifts, starting off in the wrong gear, and/or no overdrive gear.

Turbine Speed Sensor (Electrical): This Speed Sensor mounted on the transmission measures input shaft speed and its data indicates if the transmission is slipping. Shift timing and shift feel problems typically occur if the Turbine Shaft Speed Sensor fails.

Vehicle Speed Sensor or Differential Speed Sensor (Electrical): The speed sensor mounted on the transmission or differential measures vehicle speed. Without input from this sensor, the transmission may stop shifting or shift late and harsh. The converter clutch may be inhibited and the transmission will not go into overdrive.

Transmission Range Sensor / Neutral Safety Switch (Electrical-Switch & Relay): This sensor indicates the position of the gear shifter. It determines which gears are enabled or disabled. When this sensor fails, the transmission may start out in the wrong gear, fail to up shift, or seem to fall out of gear.

Overdrive Button (Transmission-Automatic): This dash, console, or shifter-mounted switch on some vehicles lets the driver disable overdrive. If the switch fails then the transmission will not go into overdrive or the driver will be unable to disable overdrive.

Brake Light Switch (Electrical Switch & Relay): The Brake Light Switch may also generate brake pedal position signals that are used to release the converter clutch when the vehicle is braking. When the Brake Switch fails, the converter clutch may not activate or deactivate properly. The vehicle may shudder while coming to a stop because the transmission is still in a too high of a gear.

Please, I use a Toyota Sienna CE 2001 that rides pleasantly until I had a shaft noise problem. I had the Constant Velocity Joints (Shaft ends) changed by a mechanic two weeks ago on a friend's recommendation. On starting the car after the work, I noticed the "ABS" and the "Tire Pressure" Lights were on.

I complained to the mechanic immediately, and he asked me to stop the engine, which I did. Then he removed the battery head for about 5mins and fixed the terminals back. The ABS Light continued to show, but the tire pressure light came up after some distance.

Now, the major issue here is that since then, my vehicle speedometer stopped reading, and then my gear selection is very erratic, and annoying cos my car engine revs longer before the gear changes.

I am actually clueless on this, but more so the mechanic. I am feeling blue cos this is my first experience with Toyota so my friend introduced this mechanic to me.

Please, can anyone help me with the solution to this?
I will appreciate guys.

I drive am '95 camry orobo and Am also having this same problem and I need help.my gear got completely spoilt months back and I had it re-kitted and it started working fine for like 3 months den it got spoilt again and I had it re-kitted again by anoda gear specialist.I started havin transmission issues as the gear became erratic and later stopped transmitting.I repaired the problem but I noticed right from when I repaired the gear that my car revs high before transmitting.am still not over satisfied with the transmission.pls does can anyone help me.pls I drive am '95 camry orobo and Am also having this same problem and I need help.my gear got completely spoilt months back and I had it re-kitted and it started working fine for like 3 months den it got spoilt again and I had it re-kitted again by anoda gear specialist.I started havin transmission issues as the gear became erratic and later stopped transmitting.I repaired the problem but I noticed right from when I repaired the gear that my car revs high before transmitting.am still not over satisfied with the transmission.pls does can anyone help me.pls

laluski: I drive am '95 camry orobo and Am also having this same problem and I need help.my gear got completely spoilt months back and I had it re-kitted and it started working fine for like 3 months den it got spoilt again and I had it re-kitted again by anoda gear specialist.I started havin transmission issues as the gear became erratic and later stopped transmitting.I repaired the problem but I noticed right from when I repaired the gear that my car revs high before transmitting.am still not over satisfied with the transmission.pls does can anyone help me.pls I drive am '95 camry orobo and Am also having this same problem and I need help.my gear got completely spoilt months back and I had it re-kitted and it started working fine for like 3 months den it got spoilt again and I had it re-kitted again by anoda gear specialist.I started havin transmission issues as the gear became erratic and later stopped transmitting.I repaired the problem but I noticed right from when I repaired the gear that my car revs high before transmitting.am still not over satisfied with the transmission.pls does can anyone help me.pls

what do you mean re kitted give us the full details of the car engine size, eg 2 litre etc

from my experience raving high before gear change means low oil in the gear box or old oil it nolonger have the quality to do a smooth gear change
with full details of the car we can give you the exact litres that you gear box should have

Expert in the house ...
I have the code on my toyota sienna P0710 - transmission fliud temperature sensor .... Pls where is the sensor and what is the cause of this alarm as the check light engine

Expert in the house ...
I have the code on my 1999 toyota sienna P0710 - transmission fliud temperature sensor .... Pls where is the sensor and what is the cause of this alarm as the check light engine

cretin:
is ur car shifting erratically or hVING gear troubles?..before u shell out ur hard earned dough...consider the parts below..they are part of the transmiison



Control Modules (Electrical): Engine (ECM) / Powertrain (PCM), Body (BCM), Automatic Transmission (TCM), and/or other control modules (some new vehicles have more than ten) use input from sensors such as those below to control shift timing and shift feel. When the responsible control module stops working, the transmission may stop shifting, shift harsh or soft, or catastrophically fail.

Mass Airflow Sensor (Emission), Throttle Position Sensor (Fuel/Air), and Manifold Absolute Pressure Sensor (Fuel/Air): The Mass Airflow Sensor (MAF) measures the mass flow-rate of air entering the engine. The Throttle Position Sensor (TPS) measures the position of the throttle (gas pedal). The Manifold Pressure Sensor (MAP) measures pressure in the intake manifold. Data from all three sensors can be used to determine engine load. A failed MAF, TPS or MAP can cause late-harsh shifts, early-soft shifts, or the transmission may stop shifting completely.

Air Temperature Sensor (Emission): The temperature of the air entering the engine intake is used to adjust the fuel/air mixture and transmission fluid pressure. A failed intake Air Temperature Sensor may cause the transmission to shift harder than normal.

Air Conditioner Relay (Electrical-Switch & Relay): The Air Conditioner Relay/Sensor indicates when the AC is on or off. This is used to adjust engine speed (RPM). A failed AC Relay may cause engine lugging or other driveability problems that may seem transmission related.

Temperature Sender / Sensor (Cooling System and Transmission-Automatic): The Coolant Temperature Sensor and/or Transmission Oil Temperature Sensor prevents the converter clutch from putting the transmission into overdrive when the engine and transmission are too cold. On some cars, other gears may also be inhibited. These sensors are likely to become even more important as more gears are added to new cars with higher fuel economy requirements. Without correct temperature data there may be late shifts, starting off in the wrong gear, and/or no overdrive gear.

Turbine Speed Sensor (Electrical): This Speed Sensor mounted on the transmission measures input shaft speed and its data indicates if the transmission is slipping. Shift timing and shift feel problems typically occur if the Turbine Shaft Speed Sensor fails.

Vehicle Speed Sensor or Differential Speed Sensor (Electrical): The speed sensor mounted on the transmission or differential measures vehicle speed. Without input from this sensor, the transmission may stop shifting or shift late and harsh. The converter clutch may be inhibited and the transmission will not go into overdrive.

Transmission Range Sensor / Neutral Safety Switch (Electrical-Switch & Relay): This sensor indicates the position of the gear shifter. It determines which gears are enabled or disabled. When this sensor fails, the transmission may start out in the wrong gear, fail to up shift, or seem to fall out of gear.

Overdrive Button (Transmission-Automatic): This dash, console, or shifter-mounted switch on some vehicles lets the driver disable overdrive. If the switch fails then the transmission will not go into overdrive or the driver will be unable to disable overdrive.

Brake Light Switch (Electrical Switch & Relay): The Brake Light Switch may also generate brake pedal position signals that are used to release the converter clutch when the vehicle is braking. When the Brake Switch fails, the converter clutch may not activate or deactivate properly. The vehicle may shudder while coming to a stop because the transmission is still in a too high of a gear.

good write up