RX - 1st Gen (1999-2003) Discussion topics related to the 1999 -2003 RX300 models

Performance Difference between Transmission U14E and U140F

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Old 10-14-17 | 10:59 AM
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Default Performance Difference between Transmission U14E and U140F

Lexus RX300 2001 TRANSMISSION interchangeable U140E AND U140F
Old 10-14-17 | 11:12 AM
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Exclamation Continuation of Requested information

I bought a used low mileage Transmission. They sent me a U140E model. Previous one was U140 F. should I return it? Can I get a new U140F CONVERTER and replace into the U140E transmission. Is there a performance difference between the two transmissions or just the converter?
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Old 10-23-17 | 03:24 AM
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There is an upgrade you can do that is fitting a cooler in, Mine never had one from factory but does now. As far as performance goes you can make the car move but if you choose to drive it at its peak performance it be short lived.
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Old 05-15-19 | 04:08 AM
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I heard the difference between the U14E and U14F is that one is for 2WD and the other is for 4WD.

Not sure if this is true.

Anyone know?
Old 05-15-19 | 04:18 AM
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I just found this:

"The U140E/F ("F" for F/awd) used in the RX300 from the "get-go" has a completely different transaxle control setup, solenoids, etc, plus the transaxle internal structure is quite different mechanically.



I guess he U140E was for the RX300s that were just FWD?
Old 05-16-19 | 11:53 AM
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Originally Posted by murphysf
I heard the difference between the U14E and U14F is that one is for 2WD and the other is for 4WD.

Not sure if this is true.

Anyone know?
U140E is for FWD. U140F is for AWD

See:First doc has table of application by vehicle
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