2008 GS350 AWD Jerking/Hesitation at Low Speed
#106
#107
When the car is crusing in like 4th, 5th, 6th gears it would start vibrating like you was driving over those things in the road to alert you of a curve. Soon as I hit the accelerator it would downshift and vibration immediately stop, until I'm back into those gears. It did feel like it was entering into the gears ruff and not smoothly like it is now.
There is a product called "dr tranny instant shudder fix" which may work for this problem. It is very rare to replace a TC for that reason. Also, a complete fluid exchange (the Ford Transmissions use a different fluid, but a Common Fluid like Maxlife ATF may be an option).
Other issues could be dirty fluids blocking the solenoids from applying correct pressure.
#108
Oh, one more thing, misfires can cause the exact same issue. I don't know if the Lexus scan tool can read raw misfire counts but that should be eliminated first. If the shudder goes away by touching the brake(that disconnects the TCC), then it is likely the transmission.
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DaGunit (04-27-18)
#111
Driver School Candidate
Oh, one more thing, misfires can cause the exact same issue. I don't know if the Lexus scan tool can read raw misfire counts but that should be eliminated first. If the shudder goes away by touching the brake(that disconnects the TCC), then it is likely the transmission.
#112
No code, because misfires much reach a high threshold for a code, and the sensors see no problem. You won't even get a transmission code because the commanded slip ratio is sustained, but the fluid or clutch is not allowing smooth slipping. The misfires may happen for a second and under certain conditions. With the 60K spark plug interval, they want to be sure misfires are an impossibility.
This is why a through diagnostic has to be done before any parts are changed. Another thing I suggest for these cars is a transmission cooler, especially in a hot climate. Such a heavy car is going to create high transmission temps and deplete friction modifiers. I installed large trans coolers (Hayden 679) on problematic ford transmissions and never had any issues, some up to 300K. Probably going to put one on mine very soon.
This is why a through diagnostic has to be done before any parts are changed. Another thing I suggest for these cars is a transmission cooler, especially in a hot climate. Such a heavy car is going to create high transmission temps and deplete friction modifiers. I installed large trans coolers (Hayden 679) on problematic ford transmissions and never had any issues, some up to 300K. Probably going to put one on mine very soon.
#113
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This part information you provided is for a Toyota 4 Runner? It doesnt have assocation with Lexus GS350 transmission shift solenoid.
#3528030050 / 2004-2019 Toyota Pressure Solenoid 35280-30050
#3528030050 / 2004-2019 Toyota Pressure Solenoid 35280-30050
#114
When the car is crusing in like 4th, 5th, 6th gears it would start vibrating like you was driving over those things in the road to alert you of a curve. Soon as I hit the accelerator it would downshift and vibration immediately stop, until I'm back into those gears. It did feel like it was entering into the gears ruff and not smoothly like it is now.
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