its a known problem with the AWD versions whether the car is lowered or not
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2006 Lexus GS 300 AWD – Glacier Frost Mica - Black - ML Package
20" x 8.5" Status Knight Wheels Black with Machine Face | Bridgestone G-Force Tires 245/30/20 | BC Racing Coilovers | Carson Tuned Lip Kit | 3000k HID Fogs | Prestigious Society Navi/DVD Override Kit | 15% Tint | Black Roof and Window Trim
I have the same problem with my 07 gs350 AWD. I notice it happens driving between 20-30 mph and accelerating very slowly. The rpm are around 1500. The tranny changes gear up to to 4th gear and the vibration starts. If i accelerate, it goes away. During quick acceleration I never notice this vibration. This seems like just a design problem. Also notice if I drive the car as a manual and go thru the gears i never notice this problem. It's annoying but doesn't appear to be serious. The problem feels just like driving a manual car in a higher gear at a low speed and need to down shifted.
Left the dealership and was advised I need to replace the transmission because they don't do transmission repair. They only replace them. They are contacting Lexus to find out what they can do for me. I bought two Honda with 100,000 mile on them. Drove them up to 200,000 miles with no problems. I'm pissed and may never buy another Lexus after this experience.
Hi Guys, so I'm having the same exact problem and Lexus said all they had to do is replace the tranmission fluid. Something about it has to be at an EXACT LEVEL and if its a bit to high or a bit to low then the car runs and shifts hard. Please let me know how accurate this really is. They said the vibration is now GONE... Please help