Skip the auto shop - Our mechanics make house calls

Q: 2011 Dodge Avenger Transmission

asked by on

hello. I recently found out that I will need a new transmission for my 2011 Dodge Avenger Lux. And I don't quite understand why based on the problem that was reported to me. I was told that there was a 3rd and 4th gear incorrect ratio. So my question is, what does this mean in laymens terms? Does this issue actually require a brand new transmission or is this something that can be fixed without installing a whole new transmission? Really hoping that a mechanic can dumb it down to my level lol. Thanks

My car has 45497 miles.
My car has an automatic transmission.

A: Hello. The most basic way to put it is the ...

Hello. The most basic way to put it is the 3rd and 4th gear are slipping. What was your concern when you had the car diagnosed? Was is just the Check Engine Light, or did you notice a problem with the transmission. The engine and transmission computer (PCM) closely monitors the transmission for malfunctions. It uses the input of 3 speed sensors.

Here is an example. We'll say that 3rd gear is 2:1, and 4th gear is 1:1. If the engine is spinning at 4000 rpm, then the output of the transmission in 3rd gear should be 2000 rpm. In 4th it would be 4000 rpm.

If the output sensor is not reading this specific rpm, the computer will set an incorrect ratio code. The gears themselves do not slip, the clutch packs that hold the gear can slip for many reasons. Now there are two things that can be going on.

The computer is correct, the gears are slipping. You will most likely know when the transmission is slipping when the computer is wrong. It could be a sensor misinterpretation or malfunction. Now, no matter what, if the code sets, the PCM will put the car into "limp" mode. You will notice this. The engine will have reduced power and the transmission will default to a preset gear. It is very possible that the transmission will need to be replaced due to this condition as long as it was properly diagnosed. You may want to have another expert inspect the car for you in person to ensure that the proper diagnosis was made.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: The car won't shift or accelerate, noisy reverse

Hello. Since the Check Engine Light is on, I start by scanning the computer for codes. This will give me a place to start. Most of the time, this is caused by a failing speed sensor on the transmission. When...

Q: Oil change

I am not sure how this could have effected your transmission but the other issues you had are very likely related to adding too much oil. Depending on how much extra oil was added, the oil level may have reached...

Q: Seized engine, no oil leaks

Did your oil leak out from somewhere? Did your drain plug fall out? Did your engine have a major engine failure? I suspect the drain plug fell out on your engine. There have been incidents of the oil pan getting...

Related articles

How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.