04 Rx330 Popping Noise @ 30 Mph

[michiganlebnani]

I bought a 04 RX330 AWD and I noticed that @ 30 MPH sometimes I hear this popping noise coming from the drivetrain like from the back area underneath the vehicle. Took it to the dealership and the technician test drove the vehicle and the outcome was: " a Trans line causinng the popping noise"

So did anyone experienced this same problem before, the technician told me there is a newly designed line to over come this issue but the cost to changed is $400 !!!!