Won’t shift warm

Transmission shifts fine when cold but doesn't want to shift when it warms up. 2000 Mazda MPV 2.5 engine 6 cyl

My car has 113450 miles.
My car has an automatic transmission.

Experienced mechanics share their insights in answering this question :
Hello. There are multiple things that could cause such transmission slippage. A more frequent cause of transmission slippage is low,old or contaminated transmission fluid.
There is a transmission control module reprogramming procedure available from the Mazda dealership. I suggest that you call the Mazda dealership and ask them if the flash is required for your vehicle. This procedure should be done at no cost from Mazda.
Most transmission slippage often sets a code in the transmission control module for a technician to retrieve to help further ID the cause . There could be a faulty sensor causing the slippage such as a transmission range sensor or shift solenoid which will set codes if they malfunction.
I believe that the root of your slippage will be caused by faulty transmission fluid. Transmission fluid has to be at a certain thickness to create the hydraulic pressure needed for shifting. Overtime transmission fluid with naturally thin which could cause improper shifting. I suggest to call the dealer about the reprogramming, have a technician check the computer for codes, and check the condition of the transmission fluid. Completing these three things should help you find a solution to your problem.

How to Identify and Fix Common car Problems ?

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

Your Car Won`t Switch Gears

It could be a sign of a faulty sensor, a solenoid that needs replacing, or even low transmission fluid. The sooner you get your car scanned by a professional who specializes in Mazda repair, the better chance you have of avoiding a costly transmission replacement.

The speed sensor is located in the rear axle. The speed sensor is removed from the rear axle housing. The new speed sensor is installed into the axle housing.
An engine that is hesitating to accelerate is most likely dealing with a fuel/air mixture that is too lean. Engine`s that are running inefficiently will begin to show signs like hesitation which will only become worse over time.
The most common reasons a Mazda MPV is overheating are a coolant leak (water pump, radiator, hose etc.), the radiator fan, or a failed thermostat.
Over time, dirt, debris and other tiny particles can accumulate in the transmission fluid, affecting its fluid properties. This can cause the vehicle to die when you shift into drive or reverse, allow a loss of power, transmission slip, rough shifts or even prevent the vehicle from shifting into gear at all.
The Transmission Range Sensor tells the PCM the position of the transmission shifter. The PCM uses this information to control which gears of the transmission to enable or disable. When the TR sensor fails it can cause wrong gear starts, no upshifts, or what feels like a falling-out-of-gear condition.
This hesitation while accelerating can be the result of a number of issues, including something like a clogged fuel filter or even a broken fuel pump. Sometimes, something could also be wrong with the transmission.
There are many common factors that cause overheating in your industrial gearbox. These include operating temperature, ambient temperature, viscosity index, load conditions, contamination levels, lubrication requirements, humidity, air velocity, and air temperature.
Possible reasons: Bad water pump, Bad temp sensor, bad fan motor of fan belts or fan clutch, No thermostat or stuck, cooling hoses weak and collapse (bottom), catalytic converter clogged, Late timing, Plugged radiator, Low oil level, Bad radiator cap, Coolant lever low, Head Gasket Blown, Transmission (lines run into …
The sensors are located either underneath the hood or underneath the car. The oxygen sensors are connected (screwed) to the exhaust pipe, either in front or back of the catalytic converter.
A speed sensor is usually mounted on the side of a wheel axle or of a traction motor axle and driven through a pin screwed into the axle.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

Won’t shift out of first unless you let go of gas but it will shift back down and never grab second
ANSWER : If you have all the drive shafts in the front and rear, then you will damage the transfer case or one of the axles if you drive the vehicle and engage the front end. The two different gear ratios will do this. As far as the transmission goes, you have a problem with the governor inside the transmission and may have bad second gear parts. Have a mechanic pressure test the transmission and diagnose the shifting issue for you.

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Transmission intermittently won’t shift to next gear
ANSWER : It is very possible that the transmission may require a full rebuild or a replacement in order for it to perform properly. Although you are able to shift into other gears, if certain gears are not working correctly, transmission damage may be the cause.

If the transmission has already been diagnosed by the dealer that it needs replacement and the transmission is still not shifting properly, it is unlikely that the transmission will get any better without replacement.

It does not hurt to attempt any reset procedure that may be available, but it is also unlikely that a reset of any kind will resolve transmission issues. Small things to check before replacing the transmission if possible would be the fluid level and any trouble codes that may have been stored due to the issue your transmission is causing.

If any codes exist, this may lead you to other possible parts inside the transmission that may be able to be replaced and have your transmission working again as it should. You can get a second opinion from an local expert, such as one from YourMechanic, in order to diagnose your shifting problem and advise you on the next steps.

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Won’t shift past 2nd gear . It drives normal to 2nd gear but wont shift into 3r – 2000 Ford F150 4×4
ANSWER : Hello – I don’t think this is related to switching back to 2WD per se. There is a shift position sensor on the side of the transmission, and it’s possible that the snow activity caused moisture and/or dirt to get into the sensor. I would recommend a transmission inspection 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.

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My car won’t shift past 30mph while driving and it revs up.
ANSWER : Hi there. It looks like you’ve got multiple problems with your 95 Ford Taurus. The transmission issue may be due to a clogged hydraulic line, which is why most certified mechanics will recommend a transmission flush as opposed to just adding oil when there is a shifting issue. The issue with the battery is most likely due to the alternator or could be electrical due to a bad connection. The problem with many older cars is that sometimes age and parts fatigue will show up quickly, even with just 70,000 miles on the vehicle.

My suggestion to you is to contact a local ASE certified mechanic who can give your car a complete safety inspection to let you know what needs to be fixed before you spend any more money chasing problems.

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Won’t shift when warm
ANSWER : Hello there, many different faults may be causing your 1988 Chevrolet C2500 not to shift. The most common would be low transmission fluid, shift linkage, transmission range sensor, shift solenoid, or a mechanical transmission fault. Have a qualified technician, such as one from YourMechanic, diagnose your shifting issue and pinpoint what repairs are appropriate.

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Truck will shift sometimes then it doesn’t shift. If you wait a while it will shift again. We are trying to figure out what’s going on
ANSWER : Hi, thanks for writing in. The first thing I recommend is to make sure the ATF (automatic transmission fluid) is full.

Does the transmission shift up a gear or two and stay in that gear, or does it drive fine for a bit, then stop shifting until you turn the car off or sit still with the motor running? Or, do you continue to drive and eventually it begins shifting again. Are there any codes?

What I would do if I were diagnosing your truck would be to connect a scanner and study the data while driving to know what is going on. Without said data and not quite being clear about what is happening, it comes down to solenoids or sensors that the TCM (transmission control module) uses to calculated shift points based on load values determined by the PCM (powertrain control module).

I’m afraid all I can offer you at this point is suggesting you make sure the fluid is full and clean. If it isn’t clean, begin by replacing the filter in the pan and do a transmission fluid exchange, not just pan drop with a drain and fill. This doesn’t get all the ATF out of the transmission, and when there are problems, it pays to be as thorough as possible.

I recommend the following inspection if you should need further assistance: Car hard to shift

Hope this helps and best of luck!

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The truck won’t shift out of park so thinking that it’s the park shift interlock solenoid? Is that a good possibility that’s what
ANSWER : Hi there. First thing to check would be, whether the brake lights are functioning at the time it won’t shift out of park. There is a possibility, there is a poor connection at the fuse. It could be, a faulty brake light switch not supplying power to the shift interlock solenoid. There may be, a poor connection or wiring concern. It could be, a faulty shift interlock solenoid. I recommend having your vehicle’s shifting issue be diagnosed and repaired by a certified technician, such as one from YourMechanic.

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My windows won’t go down, my instruments don’t work, my car won’t go in park without shift release
ANSWER : Hi, thanks for writing in. In most cases, the problems you’re describing are caused by damage to the electrical system either at the fuse box or through relays that send electrical signals to each component that isn’t working; such as your power windows, instrument panel and others. If the vehicle was exposed to lots of water, this may have damaged the electrical system or the vehicle’s on board computer as well. The best way to reduce the stress, time and money on trying to find the exact source of your problems is to have one of our local mechanics inspect your Honda Accord for electrical problems at your home or office.

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