At what mileage should you not change transmission fluid?
The general recommendation is to change your transmission fluid every 30,000 to 60,000 miles, depending on the vehicle and driving conditions. However, there are certain situations where you should not change the transmission fluid, as it could potentially do more harm than good. This article will provide a detailed explanation of when you should avoid changing your transmission fluid.
Mileage Threshold for Transmission Fluid Change
Most manufacturers recommend changing the transmission fluid every 30,000 to 60,000 miles. This is the optimal mileage range for a fluid change. Changing the fluid too early, before it has had a chance to break down, can actually cause more harm than good.
However, if your vehicle has over 100,000 miles on the odometer, it's generally not recommended to change the transmission fluid. Vehicles with high mileage have transmission components that have become worn over time, and changing the fluid can dislodge built-up deposits that have been keeping the transmission functioning. This can lead to transmission problems, such as slipping, jerking, or even complete failure.
Reasons Not to Change High-Mileage Transmission Fluid
- Worn transmission components: High-mileage transmissions have parts that have become worn over time, and the built-up deposits are helping to keep the transmission functioning. Changing the fluid can dislodge these deposits, leading to problems.
- Fluid compatibility issues: Older transmissions may not be compatible with newer, more detergent-rich transmission fluids, which can cause seals and gaskets to swell or degrade.
- Potential for transmission failure: Changing the fluid in a high-mileage transmission can sometimes be the "straw that breaks the camel's back," leading to complete transmission failure.
If your vehicle has over 100,000 miles, it's generally best to leave the transmission fluid alone unless you're experiencing specific issues, such as slipping, jerking, or leaks. Consult your owner's manual or a trusted mechanic for guidance on your specific vehicle.
How many miles is too many to change transmission fluid?
Automatic: Every 60,000 to 100,000 miles
It's important to change your transmission fluid, but the type of transmission you have affects your ideal changing interval. If you drive manual, most manufacturers will recommend changing your transmission fluid every 30,000 to 60,000 miles.
When should you not change transmission fluid?
If you don't change the fluid, the transmission will fail from the particles and varnish sticking and scratching. So if you have waited too long to change your fluid, you should plan on TWO fluid changes, changing the filter the second time (probably 500 to 1000 miles after the first).
Can changing transmission fluid cause problems?
quicker explanation: Changing fluid will NOT damage your transmission, but it could reveal damage that was already present.
Can transmission fluid last 10 years?
A: Honda recommends changing the transmission fluid at 120,000 miles and — for most drivers — that would be about 10 years.
