Q: Will a u140e trans from a 99 Lexus es300 interchange with a 99 Lexus RX 300? Fwd?

asked by on

Will a u140e trans out of a 99 Lexus es300 work properly fitted into a 99 Lexus RX 300 fwd with a u140e?

My car has 215000 miles.
My car has an automatic transmission.

Although the transmission type is the same (U140-E), the two vehicles have different Tag ID numbers on the transmissions and thus the two referenced transmission are NOT listed in the catalog as "interchangeable". Different Tag ID’s reflect differences in electrical controls and possibly differently calibrated valve bodies. At any rate, to answer your question the two transmissions are absolutely not compatible and to determine what retrofits "might" make them compatible would require quite a bit of research (it is possible to arrive at a determination, but you would have to check quite a few details and be very careful as these components are all computer controlled; matches have to be exact). If you are looking for an exact interchange, simply go to Car-Part.com and you will find an exact match for your car (there are many listed). Transmission swaps on modern computer controlled vehicles must be exact matches because if you attempt to use a transmission that is not cataloged as a direct cross reference, you will find that the engine and transmission computers will be incompatible. Always check the transmission Tag ID code. If the Tag ID of the proposed transmission does not exactly match the existing application, it will not work. Even if you can get a "different" transmission to physically fit, it will not operate properly and the PCM will spit out error codes. If you are interested in a transmission replacement (OEM to OEM), YourMechanic professionals in certain locales can assist with that. Please simply inquire based on your locale. If you have further questions or concerns, do not hesitate to re-contact YourMechanic.

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. Will a u140e trans from a 99 Lexus es300 interchange with a 99 Lexus RX 300? Fwd?

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: Car intermittently won't turn over to start

This is most likely related to a fuel supply issue at start up. When you turn the key to on, your fuel pump is engaged and quickly (for a few seconds) primes the fuel system to get fuel to the...

Q: My cars RPMs rev up and down

Hello, and thank you for writing in. Typically when the engine behaves like this, you are looking at an air issue. You will want to focus in on the air intake, mainly the throttle and throttle position sensor. You may...

Q: ABS actuator to be replaced 2nd time in a year

Hello. There is no other permanent fix for this other than replacing it with a factory unit. Once it is replaced the connections and the grounds need to be checked. Also all of the wheel speed sensor signals need to...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.