Good evening ,
Please I need expert advise on this matter.

2007 Lexus RX350 AWD
I have been experiencing a shudder when i depress the throttle - accelerating from slow speed upwards. Car shakes - like jumping(shudder/stutter e.t.c)

It happens mostly at 1st to 2nd gear and been driving me nuts.
Car drive quality is no longer as it is, drives rough , but tranny shifts fine on freeway.
I feel a buzzy sort of sensation on the floor board and steering wheel. Not vibration you feel with unbalance wheels

History:
Balanced wheels, not dent on rim.
Changed inner CV joint aka inner cup
Changed ball joint
changed disc- rotor
wheel bearing are fine
U joint are fine
ATF drained refilled with WS

I have read online it could be the torque converter locking up or struggling.

Could this be? and can it affect the drive quality? what else can i do or check?

Advise appreciated

Your TC never locks up in 1st and 2nd, so that should not be the problem. Its hard to guess what the problem​ is, based on your description. Have a competent tech look at it.

Check your exhaust mount. Those rubber may have cut. U will be surprised how suchba little thing can create a big difference.

Take it to gazzuzz

thank you all, will call Gazzuzz

Whynow:
thank you all, will call Gazzuzz

Hello, please I currently have this same symptoms now. How where you able to resolve this then? I will appreciate your feedback. Thanks

It's important you check the Propeller shaft especially the mounts holding it in the middle, you have to cease driving like that or you risk damaging the rear axle.

Check your engine mounts first o before you go far

It's usually inner CV axle cups that's the culprit,take the vehicle to an experienced Techo to check out your CV axles