Question about 2000 Kia Sephia

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3rd and 4th gear ration is out how do i fix?

Drags or rpms go up before changing to 3rd or 4th gears. autozone shows 3rd and 4th ratio is draging

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The rpm should go up before gear change, if the delay is not too long, then thats normal, however check to make sure your transmission fluid is at the proper level, you may also want to flush the transmission and add new fluid and filter.

Posted on Jul 31, 2009

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Posted on Jan 02, 2017

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I have a 2012 Dodge Avenger that is showing the codes P0732, P0733, P0734. The rpms go up even when not accelerating. And then it won't go into gear. When it's in Drive it's like its in Neutral.


Those codes indicate the PCM/TCM has determined an incorrect gear ratio for 2nd, 3rd, and 4th gear respectively. That's because it is comparing the signals from the input speed sensor and the output speed sensor on the transmission, and one or both of them is not providing an accurate signal. I would guess that one (or both) has failed and needs to be replaced.

Jul 30, 2017 | Dodge Cars & Trucks

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I took out the 700r4 and installed a th350 now at 65 mph my rpms are 5000 why?


You have no 4th gear overdrive, the engine runs faster due to that gear difference. I would change the rear end gears to a higher ratio like a 2.73: 1

Nov 24, 2016 | Cars & Trucks

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P0734 Hyundai accent 2003


code p 0734 refers to gear 4--incorrect ratio===causes --wiring---TR sensor/ switch---shift solenoids---transmission mechanical fault
I would check the operation of the transmission ration sensor/switch first as that is the most likely place that the fault is
check engine lights are not solely for the engine but report on transmission problems as well
a transmission mechanical fault is the absolute last that you should consider because the transmission will revert to normal operations until it selects gear 4 which indicates sensor or solenoid problem

Apr 13, 2012 | 2003 Hyundai Accent

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

1st 2nd 3rd gear whining noise but stops in 4th and so on,


this would be an internal bearing inside the gearbox on the input shaft......you have the shft coming in form the engine, and the input shaft houses 1,2, 3rd and 4th gears.....the 5th gear is located on an intermediate shaft.....and then you have the output shaft...now if you had said all gears i would have said output shaft bearing......and if you had said 5th gear only, then this would be the intermedaite gear.....

but you are only saying 1,2 and 3......why its not happening in fourth is that the gear ratios that the shafts turn in correlation to thre gearing changes as you get to 4, like on a 10 speed bicycle but in 4th it is a 1:1 ratio, so no excessive loads on the shafts are noticeable....

This will require a transmission overhaul......

Aug 26, 2010 | Ford Mustang Cars & Trucks

1 Answer

1991 toyota camry automatic. Transmission is fine


sounds like you may not even have a 4th gear. worst thing is you may need a new transmission. try putting in some "Lucas Transmission Fix" it's like $12 at Autozone.. If that doesn't help, take it to a transmission shop and have them check inside your transmission to see if you need a new transmission or if it's something that could be fixed. It may even be a sensor.

Dec 02, 2009 | 1991 Toyota Camry

1 Answer

02 jeep liberty won't shift into 3rd or 4th gear.


Ratio codes generally indicate a pressure loss & slipping which the computer reads as a gear ratio problem. Likely you need a rebuild.

Mar 16, 2009 | 2002 Jeep Liberty

1 Answer

I have just bought a 51 plate a3 1.8. Sometimes it wont go into third and fifth gear as it should. When trying to change into these gears it doesn't crunch it just won't let you put it in gear. The best...


The possiblities that come to mind are
1 Bad synchro in transmission 2 bad bearing(s) in transmission input shaft.   3 Bent shift linkage or shift fork (I doubt this, but it's possible)
Only number 3 is relatively cheap.  I'd go back to where/who you bought the car from, if it was that way when you bought it, and ask them to help.  It can't hurt.

Using force is NOT the solution.  If the syncros are bad, until you get them replaced, you'll be better off to determine the RPM difference between 2&3 gears (maybe 800-1000?) and also 4&5 gears (maybe 500-800?) and learn to put a modest amount of effort at exactly the time the rpms fall into that diffference.  
Example Say the difference between 2nd gear at 3500 RPM and 3rd gear is 1000 RPM, then when you take it out of 2nd for an upshift to third,  delay until the RPMs are just getting to 2500. If you are on a budget and can't fix the transmission (it's going to be big bucks) you may find you can get pretty good at this.    It is possibly to shift a car this way without even using the clutch, although I don't recommend this and it takes a great deal of practice and luck.
While you have this problem, don't downshift into 3rd,  just run the RPMs down in 4th (say to 2000 or less) until you can shift into 2nd at an acceptable RPM. The least amount of shifting you can do until you resolve this the better.
Another choice until you can fix it, is to just run up the RPMs in 2nd and then shift to 4th, and then forget you have a fifth gear.  This is much better than forcing, it's possible to do more damage by forcing. 
Is it hard to get into 3rd from 4th AND 2nd?  
..ajm

Nov 01, 2008 | Audi A3 Cars & Trucks

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