So the GX has been on OME springs for several years now. After installation I never fooled with the rear proportional valve since originally had height adjustable airbags. Seems foolish of Lexus to have variable rear brakes depending on the ride height selected. Fast forward a couple of years and I've noticed it is not as it should be.
A few months ago I was doing some medium to heavy braking on a small rolling hump in the road with a slight right hand curve in it. I heard the right rear tire chirp and actually saw a little bit of tire smoke. Kind of spooked me since I was in excess of the posted TX back highway speed limit. I wrote it off to just to 'just the right conditions' to make it happen. Fast forward to two days ago while in the feeder bands of hurricane Zeta I was headed to the big box store early in the AM to beat the rush for some regular supplies before the crazies raided the store. Tuning into the parking lot when coming off the wet highway the rear end got a little sketchy. I felt it get loose but no ABS caught it so I peddled the brakes myself and reigned it in before getting sideways into 7am work traffic. Both events never triggered the ABS and both events involved the right rear. I do not know if the left would do the same but I feel as if it would.
If lifting the vehicle would have any effect on the BPV then it should lighten the braking pressure sent to the rear. This is where I consulted the internet and did not see an immediate answer for the GX470. 80s and 120s, yes. But the OEM airbags changes things in my mind.
A few months ago I was doing some medium to heavy braking on a small rolling hump in the road with a slight right hand curve in it. I heard the right rear tire chirp and actually saw a little bit of tire smoke. Kind of spooked me since I was in excess of the posted TX back highway speed limit. I wrote it off to just to 'just the right conditions' to make it happen. Fast forward to two days ago while in the feeder bands of hurricane Zeta I was headed to the big box store early in the AM to beat the rush for some regular supplies before the crazies raided the store. Tuning into the parking lot when coming off the wet highway the rear end got a little sketchy. I felt it get loose but no ABS caught it so I peddled the brakes myself and reigned it in before getting sideways into 7am work traffic. Both events never triggered the ABS and both events involved the right rear. I do not know if the left would do the same but I feel as if it would.
If lifting the vehicle would have any effect on the BPV then it should lighten the braking pressure sent to the rear. This is where I consulted the internet and did not see an immediate answer for the GX470. 80s and 120s, yes. But the OEM airbags changes things in my mind.
