Question about 2001 Pontiac Grand Prix

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Does anyone know what this means Transmission history P O 730

It says gear ratio is incorrect, but it is the original motor. Any suggestions?

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  • Jack Iaria
    Jack Iaria May 11, 2010

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Have you changed tires and wheels to a different size? If so, that will cause a code to come up. The gear ratio is set as a value in your computer. If you change tire sizes that will cause this problem. You can have this recalibrated at your Pontiac dealer. Good luck! Phil

Posted on Jan 19, 2009


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1 Answer

My car is ford ranger 2.5tdci a/t. What is Gear 3 Incorrect Ratio ?

as the gears in an auto transmission are in constant mesh , being sun and planetary gears , it is impossible to have an incorrect ratio as such
however when the TR sensor (transmission ratio sensor) becomes faulty it doesn't know whether to use the bands or clutches and so the transmission is in limbo so to speak
that in turn applies bands or clutches incorrectly
The TR sensor reports to the transmission control module and is dependent on speeds from the VSS sensor that also determines when ratios are changed --ie when bands or clutches are applied
the fix is normally a TR sensor and /or servos / solenoids

Jul 06, 2017 | Ford Cars & Trucks

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I have a 2002 kia rio and my check engine light came on the dianost said the problem was 4th gear incorrect ratio! What does that mean?

The purpose of the automatic transmission is to match the engine's optimum power and torque characteristics to the driver's desired rate of acceleration and speed by auto-selecting different gear ratios or 'speeds' to power the wheels.

Jan 19, 2015 | 2002 Kia Rio

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How to fix problem codes 730-733 laredo 2009

There is no one fix works for all on these code. Also you have left out the letter and one number of the code I assume these are P0730 and P0733, if so read on.

P0730 CHRYSLER - Incorrect Gear RatioPossible causes- Low transmission fluid level
- Dirty transmission fluid
- Shift solenoids
- Shift solenoids harness or connectors
- Transmission mechanical problems
- Transmission hydraulic control circuit

P0733 CHRYSLER - Gear Ratio Error In Third GearPossible causes- Low transmission fluid level
- Dirty transmission fluid
- Shift solenoids
- Transmission mechanical problems
- Transmission hydraulic control circuit

Jun 27, 2012 | Jeep Grand Cherokee Cars & Trucks

1 Answer

Passat gear two ratio incorrect

This means that you have a problem in the shift solenoids of this electronically controlled transmission or a fault in the mechanical part of the transmission, this can be hydraulic fluid pressure loose or a defective valve body. In order to know the exact nature of the fault with 2nd gear some diagnostic testing must be done.

Feb 12, 2012 | 2006 Volkswagen Passat

1 Answer

My 2000 hyundai elantra is automatic it has a code p0734. which the mechanic explained me that i have to get the speen sensor replace and get new clutch because the 4 gear ratio is bad. pls advice what 2...

P0734=A/T 4th gear incorrect ratio. This has nothing to do with the speed sensor. If the speed sensor was faulty, it would also set OTHER gear incorrect ratio codes. My experience tells me the 4th gear incorrect ration indicates the torque converter clutch (TCC) is slipping and nothing more. Unless there was a speed sensor DTC (Diagnostic Trouble Code), the sensor is not the issue (yet). The fact P0734 was set (trust the computer), the TCC is slipping (out of range). Question: Maintenance history may indicate the wrong transmission fluid may have been introduced. Hyundai's Transmission fluid is strictly SPIII... there is no substitute. The incorrect fluid will cause 4th gear slippage. Now, having said that, it doesn't mean the 4th gear (lock-up) clutch isn't worn out. Have a qualified/certified Hyundai Service Technician properly diagnose this issue.

Sep 08, 2011 | 2000 Hyundai Elantra

1 Answer

How to fix this codes po443,po730,po751,po756,pib11,c1243

po 443= purge solenoid circuit
po 730= incorrect gear ratio, transmission problem
po 751= 1/2 solenoid problem
po 756= 2/3 solenoid problem
other 2 have no listing on alldata
you should seek professional help with these trans codes.
check ALL fuses first

May 28, 2011 | 1999 Oldsmobile Silhouette

1 Answer

I found a 2000 jetta with 90k original miles with a transmission problem the person said his mechanic put the scanner in and it said incorrect gear ratio he is selling it for $1900 would it be worth the...

Incorrect Gear Ratio, means the transmission is slipping, the clutches are worn out, in other words, you will need to rebuild the transmission which may cost anywhere from $1000-1800. The Kelly Blue Book is about $2800 in Fair Condition, I would pass on purchasing this vehicle unless the person is willing to fix the problem with the transmission and offer you a Warranty for the repair.

Jan 27, 2011 | 1997 Volkswagen Passat

2 Answers

Code po734, po735

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.

Jan 17, 2011 | 2003 Dodge Durango

3 Answers

I took my 2007 vw beetle into a shop and the guy said it was a transmission code po 730. What does that mean and how much will it cost. The car works fine its just when I stop at the stop light and start...

code p 0730 refers to incorrect gear ratio===causes --wiring---R ( transmission ratio) sensor /switch---shift solenoids--transmission mechanical fault
you say that the transmission runs well except for the jerk so the transmission is good
It indicates that the TR sensor is faulty so take it to an accredites auto transmission specialist shop for a proper diagnosis and quote to replace the TR sensor

Dec 19, 2017 | Cars & Trucks

3 Answers

My 1998 elantra codes po734 what does it mean

P0734 is a transmission code, and you usually have some sort of driveability issues along with it. If your transmission fluid is full, It is best to have it checked out by a transmission shop

Nov 06, 2009 | 1998 Hyundai Elantra

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