There is automatic transmission fluid in a manual transmission. Is it okay to leave or do I need manual transmission fluid?

So I just replaced the clutch master cylinder and the slave cylinder. As I let the transmission fluid leak to not cause a mess, I noticed that the fluid was automatic transmission fluid. Is that normal? I have never seen a manual transmission take automatic fluid.

My car has 1828495 miles.
My car has a manual transmission.

Experienced mechanics share their insights in answering this question :
This would depend on what the manufacturer recommends. Many manual transmissions do take automatic transmission fluid. If your transmission has ATF in it, it is very likely that it is supposed to have that in there. If not, it is likely that the transmission would not function properly with the wrong fluid. Many manual transmissions will also take engine oil as a lubricant. The best way to know for sure is to check your owner’s manual or call your local General Motors dealership to inquire.

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Will automatic transmission fluid work in a manual transmission? Yes – provided the original equipment manufacturer recommends it. It`s important to check your owner`s manual to make sure before dumping ATF in your manual transmission. In fact, some manuals may call for a gear lube or even a motor oil in older units.
The answer is, yes, you do. Just like automatic transmission fluid, manual transmission oil must be changed periodically to ensure that your transmission runs smoothly. Most manufacturers recommend that manual transmission oil be changed on a slightly more frequent schedule than automatic transmission fluid.
If there is no fluid, there is no hold, the gears cannot spin and therefore the car won`t be able to move. If your vehicle does get to the point of having no transmission fluid, you will likely also be looking at extensive repairs or even a full replacement of your transmission.
If you drive manual, most manufacturers will recommend changing your transmission fluid every 30,000 to 60,000 miles. If you have automatic, you can typically boost that range up to 60,000 to 100,000 miles. There`s no harm in changing your fluid early.
Again, manual transmission fluid must protect against wear, just like an automatic transmission fluid. Manual transmission fluid, as noted earlier, tends to be a higher viscosity than automatic transmission fluid. This helps the fluid develop a thick, durable protective film.

Keeping your car in gear when you`re stopped can damage your transmission. It`s easy to want to just keep the car in gear when you stop for ease of starting. However, it is much better for your transmission if you shift to neutral when you stop so that you are not keeping your clutch engaged.

In general, transmissions take about 9 to 13 quarts to fill completely. The amount of transmission you add will vary, depending on whether you are draining or replacing it all or you are just topping it up. Again, you should avoid adding too much.
The manufacturer`s maintenance schedule for many automatic transmissions doesn`t call for fresh fluid until 100,000 miles or, with some Ford transmissions, even 150,000 miles. A lot of mechanics say that is too long and that it should be done at least every 50,000 miles.
This is precisely the reason most specialist, independent workshops strongly recommend you replace the transmission fluid regularly in cars that come with a “lifetime” fluid. Prevention is better than cure, so keep the fluids fresh before they degrade to the point that the transmission experiences catastrophic failure.
Automatic transmission fluid is a transmission oil that is used in automatic vehicles only, but in the case of a manual transmission where the clutch and shifter are used during gear shifts, manual transmission oil is used.
The gearbox liquid has to lubricate, but without enough fluid, the transmission will overheat due to friction and you may hear mechanical noises as a result of this grinding. Your best bet is to consider a gearbox service as soon as possible.
The most common reasons a manual transmission failed are lack of lubrication, incorrect lubrication and improper or no clutch release.
Finally, ATF can alter the viscosity of the oil, reducing wear protection. Viscosity is the oil`s most important property, influencing wear protection and fuel efficiency. Increasing or decreasing viscosity by adding a little transmission fluid in oil to clean sludge can lead to increased engine wear.
Brown and dark brown hues indicate that the transmission fluid is no longer viscous and it is oxidizing. Oxidizing means the fluid is filling with air bubbles and is unable to do its job. Change your transmission fluid right away when it`s this color.
Healthy transmission fluid should be relatively clear or pink in color. If your transmission fluid is deep red or brown, your transmission fluid is old and most likely causing extra damage within your transmission. If it is dark brown, that is a sign you have burnt transmission fluid from overheating.
Manual transmissions require less servicing to remain functional and don`t need the same type of oil as an automatic transmission. Cars with a stick-shift usually last longer than an automatic of the same make and model.
Commonly, the shelf life of transmission fluids does not exceed more than 5 years from the date of manufacture. However, this period is specified for tightly closed and sealed (and stored under recommended conditions) products.
If your transmission fluid is dark brown or black, it needs to be flushed and changed right away. The reason why transmission fluid changes from bright red to brown to black as it ages is that is it oxidizing. Oxidation is bad for transmission fluid.
If it`s bright pink-the fluid is new. No need to change it. If it`s light brown with a hint of pink-It needs to be replaced. If it hasn`t been changed in a long time-it will be very dark brown.
A common, one-size-fits-all recommendation for when to change your transmission fluid is every 30,000-40,000 miles, or 5 years, based on normal, everyday driving. Truck owners who do frequent towing, or constant stop/start city drivers need to move this interval into the 20-25,000 range.
Manual transmissions are filled with fluid in order to lubricate the gears and other internal moving parts. Like any other automotive lubricant, this fluid eventually breaks down and loses its ability to protect your transmission.
Gear oil is a lubricant used specifically for automotive manual transmissions, differentials, transaxles, and transfer cases. It helps the drivetrain run smoothly and protects critical internal parts in a vehicle`s gear systems from wear and heat damage.
Yes, even a manual needs transmission fluid. The type of fluid can vary from car to car, however. Some manuals require conventional engine oil, and others function best with automatic transmission fluid. So make sure you`re putting in the fluid that`s specified for your car.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

There is automatic transmission fluid in a manual transmission. Is it okay to leave or do I need manual transmission fluid?
ANSWER : This would depend on what the manufacturer recommends. Many manual transmissions do take automatic transmission fluid. If your transmission has ATF in it, it is very likely that it is supposed to have that in there. If not, it is likely that the transmission would not function properly with the wrong fluid. Many manual transmissions will also take engine oil as a lubricant. The best way to know for sure is to check your owner’s manual or call your local General Motors dealership to inquire.

how much automatic transmission fluid to switch for 2007 camry
ANSWER : Hi there. I’ll try to clarify this for you as it can be a bit confusing. When you replace the standing oil (or oil inside the pan of the transmission) it typically is around 4 quarts of ATF. During a standard transmission oil change, that’s how much fluid is typically used. However, the transmission is comprised of multiple hydraulic lines that have fluid inside them under pressure. This fluid does not "drip" to the pan. It is removed during a transmission flush. The amount of transmission fluid inside these lines, the torque converter and other transmission components equals about another 4 quarts. So, when we complete a transmission fluid service, we are fully flushing all old transmission fluid from the entire unit; which is where we get the 8 quart requirement. It’s always a good idea to have the transmission fluid FLUSHED instead of simply changing 1/2 of the fluid.

Can I use alternative Transmission fluid to the quotes recommended fluid if i’m bringing my own parts?
ANSWER : I would recommend buying the correct fluid. The reason is because I want to make sure your car is taken care of and is running as long as possible. You wouldn’t want to put something foreign in your car that it may not accept unless you’re willing to accept risks. Different fluids have different chemicals in it. It may cost more right now, but you won’t have to spend money buying a new transmission or having one rebuilt.

Can too much transmission fluid cause speedometer malfunctions?
ANSWER : Hi there. In most cases when you overfill the transmission fluid it can cause excessive foaming of the fluid or possible internal component failure due to excessive pressure inside the hydraulic lines. Sensors like the speed sensors however are rarely impacted by this situation. However, in regards to the possibility of probability of this; I would say perhaps a 10% chance.

Hello there, I was wondering if I would need to add a manual transmission if I add a twin turbo to my automatic car.
ANSWER : I recommend keeping your transmission in your vehicle that it is designed for. If you plan on putting in a Twin Turbo setup, then the transmission will hold up to the changes. Automatic transmissions are designed to take more abuse than a manual transmission for they have more gear to gear contact and that they can adjust clutch pressure at a greater force. You may need to build your transmission with a heavier clutch pack material, but other than that, your automatic transmission will working just fine. If you need further assistance with determining if your transmission will hold up to a Twin Turbo Engine, then seek out a professional, such as one from Your Mechanic, to help you.

Do I need to get the transfer case fluid and transmission fluid changed?
ANSWER : Hi, thanks for writing in. I looked at your maintenance schedule for your vehicle and found that for up to 150,000 miles, it only says to inspect the fluid level and not change it. The fluids are special fluids and if you did need any work done (i.e. if there is a leak present or other mechanical problem) then make sure the correct Ford certified fluid is used.

When it is time for you to have your transmission fluid serviced, consider having a certified automotive technician from YourMechanic come to your home or office to perform the service for you.

Hope this helps and best of luck!

New cars don’t have transmission fluid dipsticks Transmission fluid changing
ANSWER : That’s a very good question. The reason they have gone with no dipsticks is because they don’t want people messing with transmissions other there at the dealership. Some cars went through that a couple of decades ago. They make it a very involved, convoluted process all through, in order to change the fluid on these modern cars. They have special adapters you have to put. Some of them have to have scan computers in order to read the data and what’s in there, and then be able to change it. A lot of these companies claim that this new fluid is the "lifetime" fluid.

Most new use synthetic fluid can last a long time but any fluid is going to get dirty and wear out over time. I would change it at least every 80,000 – 100,000 miles but if you’ve got one that is really hard to change, you are better off hiring a mechanic to do it.

On some of the cars, it would be too hard for the do-it-yourself because of all that equipment you need. The professional mechanics already have that. Just call any good mechanic, like one from YourMechanic, and they will be able to perform a transmission fluid service for you.

Gear shift slips over to Manual Transmission without touching. I have to hold it to keep it in Automatic.
ANSWER : Hi there. All automatic transmissions require transmission fluid for them to work. In your engine compartment by the right side next to the radiator area, there is a box in front of the air filter housing. Remove that box and below the air filter housing you will see the dipstick to the transmission. For the transmission not staying in automatic mode and conveying over to the manual mode only, the shifter has either broke inside or the circuitry has a short in the shifter housing. I recommend replacing the shifter assembly with a new one. If you need further assistance with your shifter not selecting automatic mode, then seek out a professional, such as one from Your Mechanic, to help you.