Recently had my transmission flushed (not drained) on my 2005 with 105k miles at local Lexus specialty shop. Runs ok, but I now notice every shift where in the past the transmission shifts were virtually unnoticeable. Does not shift rough, probably more like a regular car, but not as smooth as before. I have driven LS models for 20 years so I am very used to the smooth LS transmissions. Anyone one have any idea what might cause this?

 

Likely incorrect level and didn't do the relearn, you also need to change the filter...

 

Need to reset adaptive memory through Techstream, and likely the levels are off.

 

Can I reset using these steps which are in other posts?
1. Get in your car and insert key. (It doesn't matter if you close the door or not.)

2. Turn the key to the on (not start) position.

3. Press the gas pedal to the floor.

4. Hold the pedal to the floor for five seconds, then turn the key back to the "off" position (don't remove the key), then release the gas pedal.

5. Wait 2 minutes.

6. Remove key.

 

No, you need techstream or equivalent

 

Learned parameters will level out to current conditions in most TCUs over time. But always best to reset after a flush.