Can a transmission malfunction if overfilled with transmission fluid?

It sounds like you're facing a transmission issue with your MAN Diesel TGA truck. If the truck is not shifting into gear and the engine is not revving properly, there could be several potential reasons for this problem. Here are a few things you can check:

1. Transmission Fluid Level and Quality: Inspect the transmission fluid level and condition. Low fluid levels or dirty/burnt fluid could affect the transmission's performance. Ensure that the fluid is at the correct level and is not excessively contaminated.
2. Transmission Linkage: Check the linkage between the gear lever and the transmission itself. Sometimes, linkage problems can prevent the transmission from engaging properly.
3. Transmission Control Module (TCM): The TCM is responsible for controlling the shifting of gears. A malfunctioning TCM could cause issues with gear changes. Scan for any error codes using a diagnostic tool to identify TCM-related problems.
4. Solenoids: Automatic transmissions use solenoids to control the flow of transmission fluid, which in turn controls gear shifting. Malfunctioning solenoids can lead to gear engagement problems. A diagnostic scan can help identify if any solenoids are faulty.
5. Torque Converter: Issues with the torque converter can cause difficulty in shifting gears. A mechanic should inspect the torque converter to ensure it's functioning correctly.
6. Electrical Connections: Ensure all electrical connections related to the transmission system are secure and free of corrosion.
7. Vacuum Lines (if applicable): If your truck has a vacuum-controlled transmission, check for any vacuum leaks or issues with the vacuum lines.
8. Clutch System (if manual transmission): If your truck has a manual transmission, problems with the clutch system, such as a worn clutch plate or a malfunctioning clutch master or slave cylinder, could cause shifting difficulties.

Given the complexity of modern transmissions, it's recommended to have a professional mechanic or technician diagnose and address the issue. They can perform a detailed inspection, run diagnostics using specialized equipment, and provide you with an accurate diagnosis and repair plan.
If the engine is not revving properly in addition to the transmission issue, it's possible that these problems might be interconnected, and a comprehensive diagnosis is essential to resolve the overall performance issues with your truck.

This is cause by three things. 1. Low fluid causing difficult shifting. 2. Bad electronics in the 1,2, shift circuit. Or the transmission is in limp mode. The transmission can go into limp mode for several reasons. Try removing the gas cap, sometimes the evap system will cause issues. Also get the car to normal operating temperature and check the trans fluid, add as necessary, do not overfill.

Could be a problem with 1-2 shift solenoid itself, or you have a problem with contaminated transmission fluid. Hard to say what you can or can't do without knowing what year and type of vehicle you drive.

Any transmission trouble code will put the trans in second gear
and it won\'t shift.
Key on-off-on-off-on without starting the engine will illuminate
the check engine light .It will flash out the codes.Should see a 55
code ,5 flashes,a pause then 5 more. Any codes other than 12 and
55 need recorded for further diagnnosis.
I was thinking that turning the key on and opening the throttle wide
open 4 times within 5 seconds (engine off)clears tranny codes,not sure about that tho. You might try it then drive it and see if it shifts,although
as soon as the malfunction happens again it will go back into limp mode.
Tranny slipping or a slow shift or converter lock up malfunction along
with many other things will trigger this.

Hi there,

Mitsi transmissions are programmed for smooth gear changing and a brief delay is normal.

However, if the duration of the delay exceeds 2secs, then there is an internal problem with the transmission.

You need to run the diagnostics on your vehicle (the PCM controls both Engine + Trans electronics) which will determine where the fault is ocurring.

Most likely causes can be:

- Abnormal underdrive clutch pressure
- Malfunction of the underdrive solenoid valve
- Malfunction of the inderdrive clutch
- Malfunction of the valve body (which houses all the valves & soleniods etc)
- Malfunction of the idle position switch

Your Mitsubishi dealership can use their MUT-II scan tool query the solenoid.

Fluid - condition of fluid is critical for acceptable operation:

1) ONLY USE MITSUBISHI ATF FLUID - never use other brands.
2) Check fluid colour - must be nice RED colour. If black, then fluid is bad - change fluid.
3) If fluid smells burnt, then fluid should be replaced (burning smell can be a sign of internal damage).
4) Fluid level should be checked while trans is warm & idling in Park.
5) NEVER overfill the trans - overfilling can cause the excess fluid to foam, causing shifting problems.
6) Although manufacturer recommends changing fluid every 70,000 miles, it is always safer to maintain clean fluid by changing every 30,000 miles.

Cheers,



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P0732 FORD - Incorrect Second Gear Ratio
Transmission in second gear and the ECM detected an incorrect gear ration. 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 (2nd) 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

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


Hope helps.

check the fluid and all the wiring plugs going to the transmission.it is not uncommon for oil to drip onto a plug and cause bad readings,or vacuum lines that are cracked.

I also have a 2009 Outlander Sportronic transmission with a V6 engine.
Bought it this summer ... transmission appeared fine but seemed to automatically slow down the vehicle using the engines compression whenever I let go of the gas pedal.
Now that the cold weather is upon us here in Canada, whenever I accelarate normally (not like a teenager) the transmission takes quite a bit of time to shift into second... If I rev up the engine (quick take off) it seems to help but the shifting of gears is not as smooth as I would expect it (mildly slips and kicks into second)...

The worst is when come to a complete stop ... then the transmission kicks coming down from the higher gears???

I read somewhere that this is because this transmission is a CVT type and is learning my driving habits in order to adjust itself so the vehicle becomes more fuel efficient... Not sure but if the trany is computer controlled then it must be poorly writen program...
I'm taking the car in to the dealer and will write back on the diagnostic they give me ...

Here how to do it: If you see no signs of leaking from the transmission then the level is probably not low, take it to a transmission shop, transmission repair on this car is not for the DYI.

Ensure that the transaxle case temperature is 70° to 90° F (21° to 32° C). With the engine running, shift transmission through all gears. With engine idling in PARK, remove the check plug from the transmission. If transmission has been overfilled, allow fluid to drain out. If no fluid drains out, add fluid through the TRANS FLUID fill cap under the hood on the driver side in 1 pint (0.5 liter) increments until it slightly flows from the check plug. Reinstall the check plug.

Check transmission fluid levels,,replace lost fluid as needed,,,if this does not work,,take the car to a mechanic,,,sorry to say,,this kind of problem almost alway's requires a transmission mechanic to repair.