gearbox not changing gear seems to stay in high gear

Range Rover P38 diesel car will not accelerate stuck in low gear if you push it hard problem less severe

My car has 193000 miles.
My car has an automatic transmission.

Experienced mechanics share their insights in answering this question :
It is possible that you could be having an issue with one of your electronic shift solenoids. These solenoids are responsible for controling the shift between two gears. I would recommend having these shift solenoids tested by a qualfied professional to determine if replacement is necessary. I would also recommend having the vehicle scanned for trouble codes with an OBD2 scanner to help aid in the diagnosis of this issue.

How to Identify and Fix Common car Problems ?

Our sources include academic articles, blog posts, and personal essays from experienced mechanics :

One reason why an automatic transmission isn`t shifting into gear has to do with the fluid. If it`s not at the right level or the incorrect type has been used, then it`ll affect the gears. Another big reason has to do with the ECM possibly going bad.
Installed on many Land Rover models, the Range Rover gear selector suffers from internal component defects that will prevent the dial from rising, falling and rotating, often leaving the vehicle stuck in one drive mode or stuck in park.
In most cases, this issue is caused by a damaged shift solenoid or perhaps an obstruction of debris inside the transmission hydraulic lines. It could also be caused by damaged inside the transmission…
This can include sudden jerks while the car attempts to change gears, vibrations, or delays between shifting. Difficulties moving between drive, reverse, and neutral. Your vehicle should change immediately between these when you tell it to.
The bushings can make it hard to move the transmission from one gear to the next, even though you eventually do get there. Unusual sounds can indicate bushing problems as well. With bushings, thumping, bumping, squealing, and whirring sounds are most common.
One of the most common gearbox problems is the shaking and grinding of your car during a gear shift. In cases, you may also visibly notice your car shaking along with the buzzing feeling.
Fault diagnosis for a gearbox is essentially a process of fault pattern recognition, which is the same as the image classification process, belonging to the category of pattern recognition.
If your car has an automatic transmission, the shift solenoid will shift the gears for you. The transmission control unit will take the information from the engine and speed sensors along with other parts of your vehicle to then decide when to shift gears for power and fuel efficiency.
a problem with one or more of the solenoids can cause a lack of pressure, resulting in hard, soft or delayed shifts. a failed shift solenoid can also cause transmission slippage, where your engine revs faster but the car stays at the same speed.
Check to see if the brakes are applied and see if the master cylinder is full of brake fluid. If you need further assistance with your vehicle not moving when putting the transmission in drive or reverse, then seek out a professional, such as one from Your Mechanic, to help you.
Maintain Proper Transmission Fluid Levels

The #1 cause of transmission failure is low fluid, which causes overheating. In automatic transmissions, it causes delayed engagement, harsh shifts, and slippage.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

Loose gearbox that won’t find 2nd or 5th gear, sometimes hard to differentiate between 1st and 3rd.
ANSWER : There are a couple of possibilities. The first thing that comes to mind is of course the shifter itself. There is a nylon ball and socket joint at the base of the gearshift lever that sometimes falls apart, making the feel of the shifter very vague. Additionally, there are links to the transmission shift linkage that involve nylon bushings and joints that can fall apart. Both problems are very common on your car. The other less common possibility is that you have a bad motor mount that is allowing the transmission to move around too much when you try to shift gears. either way, it’s not a big deal to fix, and probably won’t require expensive transmission work. If you contact Your Mechanic, they can send a technician to your home or office to check out you shifting issue and let you know what repairs it will take to correct it.

My manual gear box is starting to get a little bit "clunky" as i change gears, is there an additive i can add to the gear oil?
ANSWER : The first thing to do is to drain and check the oil to see if it has any broken chunks of metal or a lot of brass metal pieces that indicate the gears and synchronizers for the gears are bad. If no metal is found then replace oil with recommended oils for transmission. If metal is found then an internal transmission repair is needed.

My manual car won’t go into gear, it turns on and the clutch goes down perfectly fine. It happened after my gears grinded, the car
ANSWER : If the clutch mechanism is releasing properly, and the shift linkage is not malfunctioning, your transmission will have to be removed from the vehicle and inspected. Once a transmission has been removed from a vehicle, if the problem is a broken or worn part or parts, and the transmission has 100,000 miles or more, the most cost effective approach is to just simply rebuild the whole transmission. There are transmission rebuild kits that are sold just for this purpose. Rebuilding a transmission is no big deal and is indeed easier in many respects than rebuilding an engine. You can rebuild your transmission right in your own garage. You can NOT rebuild an engine in your own garage due to the highly specialized, and extremely costly, machine shop equipment required. Occasionally, mobile mechanics will take on a transmission rebuild job especially as once the mechanic removes the transmission from the vehicle, it is just simply a modular unit that can be easily transported to a mechanic’s shop and rebuilt right there and then returned to your vehicle. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.

gearbox not changing gear seems to stay in high gear
ANSWER : It is possible that you could be having an issue with one of your electronic shift solenoids. These solenoids are responsible for controling the shift between two gears. I would recommend having these shift solenoids tested by a qualfied professional to determine if replacement is necessary. I would also recommend having the vehicle scanned for trouble codes with an OBD2 scanner to help aid in the diagnosis of this issue.

My truck won’t allow me to change gears even when pressing the clutch. No gears go in at all. Makes it impossible to drive.
ANSWER : Hello, this concern is possibly the slave or clutch master cylinder failure. These two components use brake fluid to apply pressure for movement of the clutch system. This fluid breaks down in time and causes the seals to fail (leak). A low fluid level would cause this concern as well as internal leakage. Replacement of components would be necessary. This type of concern would need to be inspected. If you’d like, a certified technician from YourMechanic can come to your location to diagnose your vehicle, and possibly replace your clutch master cylinder if need be.

Will gears change smoothly in a automatic gearbox when planetary gears are broken
ANSWER : Hi there – planetary gearsets are used to reduce revolutions per minute, and increase the torque available. They are not directly involved in gear changes per se, but a broken planetary gearset will certainly cause a shift to fail if the gear selected (during an upshift for example) includes that gearset. And it won’t be smooth. Bottom line – if your transmission has a broken/damaged planetary gearset, you WILL notice! I recommend a transmission inspection performed by a mobile, professional mechanic, such as one from YourMechanic, who will come to your location, diagnose this problem, and give you an accurate assessment of damage and cost estimate for repairs.

Driving car, changed gear and clutch wouldn’t lift or wouldn’t allow me to change gear , Vauxhall Corsa SXI
ANSWER : Hello – I believe your clutch hydraulics have failed, most likely with a low fluid level (check), or a fluid puddle under the car (or both). As a result, the clutch does not disengage, or allow gear changes. I would recommend an inspection of the clutch hydraulics by a mobile, professional mechanic, such as one from YourMechanic, who will come to your location, diagnose this problem, give you an accurate assessment of damage and cost estimate for repairs.

Switch to Manual mode, but gears don’t seem to change any more in that mode
ANSWER : This is an internal problem with the shift switch on the transmission selector. The transmission would need to be tested to see if it is a defective selector switch or a transmission valve body problem. The system would need to be tested since the system goes through the transmission control module, and sends signals on the computer network to the dash display. If the system is in failure mode, then it may not let you go into manual mode. Have your gear shifting issue checked just incase the transmission has an internal failure.