The heat is on, and it's time to get transmission and differential fluids
We are witnessing heat stress on transmissions, which means it is time
to get transmission and differential fluids tested and possibly changed.
When transmission fluid is dark and cloudy,
vehicles have been operated repeatedly in high–demand conditions
such as extended idling, stop-and-go driving, or towing.
The transmission requires regular maintenance if it is to continue to
operate without failure. The maintenance schedule found in your vehicle
maintenance guide indicates the appropriate fluid replacement schedule.
For example, if the vehicle is used to tow, operates on dusty, rough,
muddy or salty roads, experiences extensive idling, or is used for low-speed
driving and short trips, transmission and differential fluids may need
to be checked and replaced more often. Most manufacturer' schedule recommends
transmission fluid be changed each 20,000 miles or 24 months. For heavier
duty, however, manufacturers suggest inspection each 15,000 miles.
At Nippon, we inspect your transmission and differential
fluid levels and condition every time you we change your oil.
Keep in mind that the maintenance schedules published by manufactures
are generalized for every state. Our state of Arizona is very hot. It
is harder on transmissions. Just think of the road heat. We strongly recommend
that most vehicles have the transmission fluid changed each 15,000 miles.
should inspection show dark and cloudy conditions.
At higher mileage (80, 0000 and up) we encourage you to think about transmission
fluid exchange as opposed to transmission drain and refill. By exchanging
the transmission fluid, it also provides the opportunity to have the torque
converter drained and filled with clean fluid. This service extends the
life of your transmission considerably. Give us a call and we will explain
this very valuable service.
Keep your transmission fluid filled to the proper level
at all times:
- If the fluid level is too low, the transmission oil pump will draw
air, causing the fluid level to mix with air and become aerated. Aerated
fluid lowers the hydraulic pressure in the hydraulic control system,
causing slippage and resulting in damage to clutches and bands inside
- If the fluid level is excessive (too full), planetary gears and other
rotating parts will agitate and whip the fluid, causing symptoms similar
to those found with too low fluid level. In addition, aerated fluid
will rise within the transmission case and may leak out of the breather
plug at the top of the transmission or through the dipstick tube.
- In addition, always be sure to check the differential fluid in a transaxle.
This fluid is sealed off and separate from the transmission cavity in
A reminder: All transmissions do not use
the same kind of fluids. If you can’t visit Nippon, please ask your
service provider to verify the type of fluid needed in your
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