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 (4th) supposed by TCM, the slip ratio will be more than normal. In case the ratio exceeds the specified value, TCM judges this diagnosis malfunction." property="og:description">

For Shop Owners

P0734 MITSUBISHI - Gear 4 Incorrect Ratio

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3 What does this mean?

Possible causes

  • Low transmission fluid level
  • Dirty transmission fluid
  • Shift solenoids
  • Transmission mechanical problems
  • Transmission hydraulic control circuit
What does this mean?

Tech notes

Start by inspecting the transmission fluid level and condition, and change fluid if necessary.
What does this mean?

When is the code detected?

P0734 is detected when A/T cannot be shifted to the 4th gear position even if electrical circuit is good.

Possible symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)
  • Incorrect transmission shifting

P0734 MITSUBISHI Description

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 (4th) supposed by TCM, the slip ratio will be more than normal. In case the ratio exceeds the specified value, TCM judges this diagnosis malfunction.

OBDII Code P0734 Mitsubishi - Gear 4 Incorrect Ratio - itimaster.ru

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P0734 MITSUBISHI Comments

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Any information is appreciated. Thanks
Repair Importance Level: 3
1=Low 2=Medium 3=High
Repair Difficulty Level: 3
1=Easy 2=Moderate 3=Hard

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