How can I fix a p0735 (incorrect ratio 5) and P0775 error codes. is th promblem inside my transmission?

code p0735 refers to gear 5 --incorrect ratio.===causes --wiring---TR sensor / switch---shift solenoids--transmission mechanical fault. I would be replacing the TR sensor/ switch first. IF it looks like a transmission mechanical fault Have pressure test done first and check the bands and clutch adjustments before considering a replacement/ over haul. I feel confident it is a electronic fault

P0700 Transmission Control System

P0701 Transmission Control System Range/Performance

P0702 Transmission Control System -Electrical

P0703 Torque Converter/Brake Switch B Circuit

P0704 Clutch Pedal Position Switch -Circuit Malfunction

P0705 Transmission Range Sensor/Switch Circuit Malfunction (PRNDL Input)

P0706 Transmission Range Sensor/Switch Circuit Range/Performance

P0707 Transmission Range Sensor/Switch Circuit Low Input

P0708 Transmission Range Sensor/Switch Circuit High Input

P0709 Transmission Range Sensor/Switch Circuit intermittent

P0710 Transmission Fluid Temperature Sensor Circuit

P0711 Transmission Fluid Temperature Sensor Circuit Range/Performance

P0712 Transmission Fluid Temperature Sensor Circuit Low Input

P0713 Transmission Fluid Temperature Sensor Circuit High Input

P0714 Transmission Fluid Temperature Sensor Circuit Intermittent

P0715 Input/Turbine Speed Sensor Circuit

P0716 input/Turbine Speed Sensor Circuit Range/Performance

P0717 Input/Turbine Speed Sensor Circuit No Signal

P0718 Input/Turbine Speed Sensor Circuit Intermittent

P0719 Torque Converter/Brake Switch B Circuit Low

P0720 Output Shaft Speed Sensor Circuit

P0721 Output Shaft Speed Sensor Circuit Range/Performance

P0722 Output Shaft Speed Sensor Circuit No Signal

P0723 Output Shaft Speed Sensor Circuit Intermittent

P0724 Torque Converter/Brake Switch B Circuit High

P0725 Engine RPM Input Circuit

P0726 Engine RPM Input Circuit Range/Performance

P0727 Engine RPM Input Circuit No Signal

P0728 Engine RPM Input Circuit Intermittent

P0729 Gear 6 Incorrect Ratio

P0730 Incorrect Gear Ratio

P0731 Gear 1 Incorrect Ratio

P0732 Gear 2 Incorrect Ratio

P0733 Gear 3 Incorrect Ratio

P0734 Gear 4 Incorrect Ratio

P0735 Gear 5 Incorrect Ratio

P0736 Reverse Incorrect Ratio

P0737 TCM Engine Speed Output Circuit

P0738 TCM Engine Speed Output Circuit Low

P0739 TCM Engine Speed Output Circuit High

P0740 Torque Converter Clutch Solenoid Circuit

P0741 Torque Converter Clutch Solenoid Circuit Performance or Stuck Off

P0742 Torque Converter Clutch Solenoid Circuit Stuck On
P0743 Torque Converter Clutch Solenoid Circuit Electrical
Now i dont know a lot about automatics especially modern ones with all this fancy electronics thats used nowdays but i think its a fault with the temperature sensor for the gearbox.But where its located and what it looks like i have no idea it could even be mounted inside the gearbox .Sorry not a very good answer from a mechanic but?? very few of our europeon cars come with auto transmission .Evan when i do know whats wrong i cannot buy the parts for the gearbox as only re-con boxes supplied by the dealer so best advice is to try a specialist in auto box repairs only .PS some of my best students when i used to teach mechanics many moons ago were the girls so no excuses like iam only a girl please

P0735 - 5th Gear Incorrect Ratio

Possible Causes:
- Low transmission fluid level
- Dirty transmission fluid
- Shift solenoids faulty
- Transmission mechanical problems
- Transmission hydraulic control circuit

P0735 FORD - Automatic Transmission Incorrect Fifth Gear Ratio Incorrect Possible causes - Low transmission fluid level
- Dirty transmission fluid
- Shift solenoids
- Transmission mechanical problems
- Transmission hydraulic control circuit
P0732 FORD - Automatic Transmission Incorrect Second Gear Ratio Incorrect All - causes would be the same as above with ALSO Probable bad valve body - and or pressure solenoids. Probable bad clutch band. If the fluid is ok and if you have tried changing the fluid and filter to no aval. Is it time to think about a transmission repair at a local transmission shop. Sorry.

P0775 FORD - Automatic Transmission Pressure Control Solenoid B Malfunction Possible causes - Faulty line pressure solenoid B valve
- Line pressure solenoid B valve harness or connectors
- Line pressure solenoid B valve circuit is open or shorted
- Low transmission fluid level
- Dirty transmission Fluid P0735 FORD - Automatic Transmission Incorrect Fifth Gear Ratio Possible causes - Low transmission fluid level
- Dirty transmission fluid
- Shift solenoids
- Transmission mechanical problems
- Transmission hydraulic control circuit

This is what your codes mean:

Trouble Code-P0734 (A/T Additional Gear Ratio Error In Fourth Gear)


Trouble Code Conditions:
Vehicle driven to a speed of 4-37 mph at more than 500 rpm, gear selector in 4th Gear in Drive, and the PCM detected too much difference in the engine speed and output shaft speed.
Possible Causes:

• Customer may complain of intermittent 4th gear operation
  
• O/D and 2/4 pressures less than 75 psi
  
• O/D or 2/4 clutch volume indexes out of specification
  
• O/D accumulator seals are damaged
  
• Transmission enters "limp in" mode running in 4th gear
  

Trouble Code-P0735 (A/T Gear Ratio Error Fourth Prime)

Trouble Code Conditions:
Vehicle driven any forward Gear, and the TCM detected the ratio of the Input speed to the Output Speed did not match the current Gear Ratio (this test can take up to 5 minutes).
Possible Causes:

• Related Gear Ratio trouble codes may be stored (note that some of these Gear Ratio trouble codes may be intermittent)
  
• Transmission has internal problems or damage present
  

You have a transmission problem.Hope this helps, James Booth

Hi,
For the Audi A8 code P0735 "Gear 5 Ratio incorrect" is a transmission problem and should be taken to a transmission shop that you trust. Have a good day.

P0735 VOLKSWAGEN - Gear 5 Incorrect Ratio
P0735 se detecta cuando A / T no se puede desplazar a la posición 5 ª marcha incluso si el circuito eléctrico es bueno.

Notas técnicas
Empieza por inspeccionar el nivel de líquido de la transmisión y el estado, y el líquido cambia si es necesario.

Este diagnóstico monitores de la posición real del engranaje de control de la relación de deslizamiento del convertidor de par calculado por el Módulo de Control de Transmisión (TCM) de la siguiente manera:
Convertidor de par deslizamiento ratio = A x C / B

R: El eje de salida de la señal revolución de la revolución del sensor
B: Motor de la señal de velocidad del motor del módulo de control (ECM)
C: Relación de cambio fijado en la posición del engranaje que supone la medicina tradicional china

Si la posición real del engranaje es más alto que la posición (5 º) supone por TCM, la proporción de deslizamiento será más de lo normal. En caso de que la relación es superior al valor especificado, los jueces TCM este mal funcionamiento diagnóstico.

Los síntomas:
- A la luz del motor (o motor del servicio pronto luz de advertencia)
- Cambios de la transmisión incorrecta

Posibles causas:
- La transmisión de bajo nivel de líquido
- Dirty líquido de la transmisión
- Turno de solenoides
- Problemas de transmisión mecánica
- Transmisión del circuito de control hidráulico

Espero que esto le ayude. Por si acaso, adjunto el detalle en ingles original.

Suerte.

P0735 is detected when A/T cannot be shifted to the 5th gear position even if electrical circuit is good.

Tech Notes
Start by inspecting the transmission fluid level and condition, and change fluid if necessary.

This diagnosis monitors actual gear position by checking the torque converter slip ratio calculated by Transmission Control Module (TCM) as follows:
Torque converter slip ratio = A x C/B

A: Output shaft revolution signal from revolution sensor
B: Engine speed signal from Engine Control Module (ECM)
C: Gear ratio determined as gear position which TCM supposes

If the actual gear position is higher than the position (5th) supposed by TCM, the slip ratio will be more than normal. In case the ratio exceeds the specified value, TCM judges this diagnosis malfunction.

Symptoms:
- Engine Light ON (or Service Engine Soon Warning Light)
- Incorrect transmission shifting

Possible Causes:
- Low transmission fluid level
- Dirty transmission fluid
- Shift solenoids
- Transmission mechanical problems
- Transmission hydraulic control circuit

This is what your codes mean:

Trouble Code-P0734 (A/T Additional Gear Ratio Error In Fourth Gear)

Trouble Code Conditions:
Vehicle driven to a speed of 4-37 mph at more than 500 rpm, gear selector in 4th Gear in Drive, and the PCM detected too much difference in the engine speed and output shaft speed.

Possible Causes:

• Customer may complain of intermittent 4th gear operation
  
• O/D and 2/4 pressures less than 75 psi
  
• O/D or 2/4 clutch volume indexes out of specification
  
• O/D accumulator seals are damaged
  
• Transmission enters "limp in" mode running in 4th gear
  

Trouble Code-P0735 (A/T Gear Ratio Error Fourth Prime)

Trouble Code Conditions:
Vehicle driven any forward Gear, and the TCM detected the ratio of the Input speed to the Output Speed did not match the current Gear Ratio (this test can take up to 5 minutes).

Possible Causes:

• Related Gear Ratio trouble codes may be stored (note that some of these Gear Ratio trouble codes may be intermittent)
  
• Transmission has internal problems or damage present
  

You have a transmission problem.

p0732
incorrect gear ratio,second gear

p0735
incorrect gear ratio, fifth gear

p1762
are you sure this is the code number it is a manufacturer-specific code. and i'm not seeing it in my bood check to see if you have the right numbers on it.