Manual transmission Can low oil in a manual 5 gear overdrive transmission cause a problem to shift into a button type overdrive transmission

The erratic jumping in and out of overdrive (O/D) on your 2006 Terrano 3GMR with a 3.2L engine could be caused by a few different issues. Here are some possible causes and fixes:

1. Faulty speed sensor: The speed sensor provides input to the transmission control module (TCM) to determine when to engage overdrive. A faulty sensor can cause the TCM to think the vehicle is going too slow or too fast for overdrive engagement. A mechanic can test the speed sensor and replace it if necessary.
2. Low transmission fluid level: Low transmission fluid level can cause the transmission to shift erratically or not engage overdrive. Check the transmission fluid level and add fluid as necessary. If the fluid level is low, it's important to also check for any leaks that may be causing the fluid loss.
3. Worn or damaged overdrive band: The overdrive band is responsible for engaging and disengaging overdrive. If the band is worn or damaged, it may not engage properly. A mechanic can inspect the overdrive band and replace it if necessary.
4. Transmission control module (TCM) issues: The TCM controls the shifting and engagement of overdrive. If the TCM is malfunctioning, it may not engage overdrive or cause erratic shifting. A mechanic can test the TCM and replace it if necessary.

It's recommended to have a professional mechanic diagnose and repair the issue, as the transmission is a complex and vital component of the vehicle.

1. ransmission fluid: Low or dirty transmission fluid can cause a range of transmission issues, including loss of reverse and overdrive. Check the transmission fluid level and condition, and consider flushing and replacing the fluid if it is dirty or low.
2. Transmission filter: A clogged transmission filter can restrict the flow of fluid through the transmission and cause issues with reverse and overdrive. Consider replacing the transmission filter and flushing the fluid to see if this resolves the issue.
3. Shift solenoid: The shift solenoid is responsible for controlling the flow of fluid through the transmission to engage different gears. If the solenoid is faulty or damaged, it can cause issues with reverse and overdrive. Consider having the shift solenoid tested and replaced if necessary.
4. Valve body: The valve body is a complex component within the transmission that helps to control the flow of fluid and engage different gears. If the valve body is damaged or worn, it can cause issues with reverse and overdrive. Consider having the valve body inspected and replaced if necessary.
5. Internal transmission damage: If none of the above issues resolve the problem, there may be internal damage within the transmission that is causing the loss of reverse and overdrive. In this case, it may be necessary to have the transmission rebuilt or replaced.

It's important to address these issues promptly to prevent further damage to the transmission or other components in your Chevy Silverado

to start with there is nothing wrong with the ransmission
It is all electronic faults
the transmission is constant mesh so ratios are not manually changed by done by servos and solenoids
the fault code refers to the TR sensor that can be changed out , the hard shifting is probably dirty oil and the changing between ratios a problem TCM or wiring harness connections
if the transmission oil has not been changed in the last 60K miles , that would be a good place to start, then have the auto transmission professional service center where you are having the oil change done, check out the servo/ solenoids operations

If the shift lever is what is hard & sticky, get some grease & lube the handle at the joint at the trans. ( Maint. anyway) . The right gear oil? Was it doing it before the oil chg ? How's the clutch feel? Clutch, Pressure plate & throw out bearing poss. Smell any burning smells? One step at a time. Good luck

P0731 Ford - Incorrect First Gear Ratio
Possible causes
- Low transmission fluid level
- Dirty transmission fluid
- Shift solenoids
- Transmission mechanical problems
- Transmission hydraulic control circuit

p0732 Gear 2 Incorrect ratio
Possible causes
- Low transmission fluid level
- Dirty transmission fluid
- Faulty Shift Solenoids
- Shift Solenoids harness is open or shorted
- Shift Solenoids circuit poot electrical connection
- Transmission mechanical problems
- Transmission hydraulic control circuit

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

also check OUTPUT SHAFT SPEED OSS for proper installation and function

hope this helps

first thing to check is transmission oil level and quality. If that is fine than your looking at either a valve body problem (valve body is what controls the selection of gears) or possibly a problem with the bands on the planetary gear set, they can be tightened in certain models. However i dont think it is the bands.
Does the overdrive only engage 4th gear? or does it feel like the gear ratios are different between overdrive and normal before the problem happened? some overdrive buttons engage final gear and some do as much as change gear ratios like in a cvt (contantly variable transmission) and some just change the timing in the gear changes to provide more rpm/power.
My best guess is that the valve controlling the overdrive in the valve body has failed and therefor you dont get a response from the transmission (i.e no gear shifting when overdrive is selected)

If you have a manual transmission model, check the wiring to the overdrive solenoid (M46,M47 transmission with type M overdrive) and check all fuses. This solenoid simply opens a check valve that allows the overdrive to function (DO NOT reverse the vehicle with the overdrive engaged or damage will result to the unit itself).
Automatic transmission models also have an overdrive override solenoid, bottom left side. If it is stuck in the override mode, check for shorted wiring to the solenoid. Also check the switch which can bind closed. If you can put a voltmeter on the wiring to the solenoid itself, check for voltage; if you have voltage and the switch is known good, the wiring is faulty. No voltage means the solenoid plunger is stuck down. Remove the solenoid and repair or replace it. In most cases replacement of a well-used item is better than repair.
All models: Always verify the condition of the wiring and connectors before condemning the unit. In most cases a voltmeter will rule out what the solenoid isn't doing. If you have voltage at the terminals on manual transmission models but no overdrive function, the solenoid has either seized or the coil has burned out. On automatic transmission models voltage at the terminals means the opposite: the solenoid will override overdrive and keep it in the third gear. No voltage for manual means no overdrive; no voltage on the terminals for automatic models means overdrive engages normally; if this is the case, replace the solenoid.
If, after all this checks out, on automatic models, this means that the transmission valve body has plugged up with deposits. For manual models, it means roughly the same (the overdrive is essentially a one-gear automatic transmission) and it also indicates that something is amiss with the hydraulic circuits, in both cases. Low line pressure can also cause this to happen in both types which means either the fluid is bad, the valve body is dirty, the screen is clogged or the main oil pump in the transmission (automatic models) is leaking. Always perform a thorough check before condemning either transmission type - they are conventional in design and very sturdy.
On AW-7x transmissions, no brake bands are used, therefore only clutch packs are employed. On the M46 and M47 manual models, the overdrive is a bolt on unit (type J or type M, depending on year). On the ZF series of automatic transmissions, the overdrive is integral to the transmission, being a true fourth gear. All models use a solenoid to control the upper gear range.
Note also that if you have the manual transmission, it may prove risky to rebuild it if you can beat the synchro by a quick change. Rebuilds offer up different wear surfaces to the case and can make a noisy transmission noisier.
Automatic models utilize clutch packs front to back. Band brakes were eliminated entirely, and when these start to fail the most noticeable problem is sloppy, hard shifting even after a fluid and screen job. The clutch wear surfaces decrease in friction holding and become thin. This implies loose clutches and this implies poor shift quality.
Always change the fluid completely (including the oil cooler, note it is thermostatically controlled) and clean the magnets of all debris. Introduce new oil into the system and test again.

Sounds like you've used the wrong type of transmission fluid for your trans.
Check in your owners manual.

There isn't anything wrong with your car. This is perfectly normal. I have a 2000 ES300 as well as other people that I know and it operates in the same way. Overdrive doesn't mean the same thing for every car or transmission. In our case overdrive is simply a reference to the top gear which is 4th gear. When you switch overdrive off(which is depressing the button causing the O/D OFF dash light to illuminate,) the highest gear becomes 3rd because you turned 4th gear or overdrive off. The application scenario for this is usually mountainous terrain where a lot of uphill driving makes it more feasible not to up shift into 4th gear while ascending and descending. It will not switch back to overdrive or 4th gear until you re-engage it by turning the overdrive back on or repressing the button. Again, when the O/D OFF dash light is illuminated, overdrive which is 4th gear is off and the highest gear will then become 3rd. It will never shift into 4th gear while this light is illuminated or overdrive is off. When you press the button and the O/D OFF dash light is NOT illuminated overdrive is on and therefore it will shift into 4th gear as usual. This applies to all 97-2001 ES300's and probably any other car you drive tat exhibits this same type of change when overdrive is turned off.

Hi Joe, what you need to do is go to a trans. shop and have them adjust the TV (Throttle Valve) cable. You can do this yourself but you need a really low PSI guage. When the line pressure is at 0 - 5 PSI, it will be adjusted properly. Usually only trans. shops will have the proper tools to do this. It's very important that the TV cable is adjusted right on the money or you'll smoke your transmission.