Q: Why is my truck is leaking transmission fluid?

asked by on

My truck is leaking transmission fluid, and I believe it is the seals or the pans. Also, with the oil pan, would I have to lift the engine or is there any other way to do it? If someone can give me any advice on this, that'd be great. Engine: 460 Transmission: e40d

My car has an automatic transmission.

Hi there. Check the location of the transmission fluid leak on the case to determine what needs replaced. There are 5 locations for the transmission to leak that are common.

Locations of a leak

  • The input shaft seal
  • The rubber grommet seal on the fill tube
  • The pan gasket
  • The vent tube (in the event the transmission may be overfilled)
  • The output shaft seal
  • The shifter bushing could be damaged
  • The cooler line connections

If you are wanting to replace the transmission oil pan gasket, you will have to drop the exhaust system if there is a wide pipe that crosses under the transmission and jack up the engine if the pan cannot clear any cross frame members. Make sure that you jack the engine from a secure solid location or winch it up with a cherry picker and then engine mounts need to be removed. If you need further assistance with the transmission oil leaks, then seek out a professional, such as one from Your Mechanic, to help you.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Why is my truck is leaking transmission fluid?

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Clunking noise and jolting when put in reverse

Many different faults can cause the vehicle to clunk and not be able able to shift out of gear. Transmissions use the fluid to help change gears, and when fluid is low or dirty, it can cause many issues with...

Q: Rough idle after timing chain install run ok after 2500 rpms

You should check the big main vacuum line going from the PCV valve to the intake manifold. The connection at the manifold gets a hole in it and will cause problems with running at lower rpms.

Q: I have a 1992 Lexus Ls400 and the transmission wont switch out of 1st gear the caer has 261k miles should i get a new transmission

You should have the computer scanned for codes that may point to the cause of the no shift out of first gear. You may just have a solenoid that is bad for one of the gears and just need to...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.