car jerks when slowing to a stop a lexus ls 400 year 1994 could it be air control
01-10-18, 01:37 PM
#4
You need to tell us all of the story.
If you pop it into neutral and push the brake pedal to come to a stop does it still jerk? Then its likely the brake rotors are warped. We really need a better description of the problem.
If you pop it into neutral and push the brake pedal to come to a stop does it still jerk? Then its likely the brake rotors are warped. We really need a better description of the problem.
01-11-18, 09:11 PM
#5
Racer
I had an issue where it wouldn't pop up a code for the longest time but then after 10k miles P0770 finally showed up after it got worse.
I had a shuddering when coming to a stop. It ended up being my lock up solenoid for the transmission was not functioning and would drag the torque converter down and wouldn't unlock at low speeds, basically 10-0mph.
These solenoids are VERY pricy at $300 each if you stick to OEM Lexus which I intended on doing. I ended up trying a salvage yard one since I wanted to rule it as the cause before investing that amount of money, and my problem went away. I left it in there since my car was working fine after doing that solenoid, three drain and refills and then finally a transmission filter on the last drain and fill.
I have a feeling these transmissions are very sensitive to the proper type of fluid and keeping that Toyota T4 fluid fresh is important as well. I would say do a drain and fill (3qts) every 15-20k just to keep it relatively clean and to get the metallic particles removed from that magnetic drain plug as much as possible.
I had a shuddering when coming to a stop. It ended up being my lock up solenoid for the transmission was not functioning and would drag the torque converter down and wouldn't unlock at low speeds, basically 10-0mph.
These solenoids are VERY pricy at $300 each if you stick to OEM Lexus which I intended on doing. I ended up trying a salvage yard one since I wanted to rule it as the cause before investing that amount of money, and my problem went away. I left it in there since my car was working fine after doing that solenoid, three drain and refills and then finally a transmission filter on the last drain and fill.
I have a feeling these transmissions are very sensitive to the proper type of fluid and keeping that Toyota T4 fluid fresh is important as well. I would say do a drain and fill (3qts) every 15-20k just to keep it relatively clean and to get the metallic particles removed from that magnetic drain plug as much as possible.
01-16-18, 09:56 AM
#6
I think I know what you mean, and if so, it's quite normal. When the AC compressor engages, the ECU raises the engine RPM slightly, so if you're slowing to a stop and the AC cuts in or out as part of its normal cycle, then you will feel a jolt as the RPM changes. Plus, a difference in braking effort at the same time.
Is this what you're talking about?
Is this what you're talking about?
Last edited by VolumeToo; 01-16-18 at 10:03 AM.
10-05-18, 05:56 PM
#7
I had an issue where it wouldn't pop up a code for the longest time but then after 10k miles P0770 finally showed up after it got worse.
I had a shuddering when coming to a stop. It ended up being my lock up solenoid for the transmission was not functioning and would drag the torque converter down and wouldn't unlock at low speeds, basically 10-0mph.
These solenoids are VERY pricy at $300 each if you stick to OEM Lexus which I intended on doing. I ended up trying a salvage yard one since I wanted to rule it as the cause before investing that amount of money, and my problem went away. I left it in there since my car was working fine after doing that solenoid, three drain and refills and then finally a transmission filter on the last drain and fill.
I have a feeling these transmissions are very sensitive to the proper type of fluid and keeping that Toyota T4 fluid fresh is important as well. I would say do a drain and fill (3qts) every 15-20k just to keep it relatively clean and to get the metallic particles removed from that magnetic drain plug as much as possible.
I had a shuddering when coming to a stop. It ended up being my lock up solenoid for the transmission was not functioning and would drag the torque converter down and wouldn't unlock at low speeds, basically 10-0mph.
These solenoids are VERY pricy at $300 each if you stick to OEM Lexus which I intended on doing. I ended up trying a salvage yard one since I wanted to rule it as the cause before investing that amount of money, and my problem went away. I left it in there since my car was working fine after doing that solenoid, three drain and refills and then finally a transmission filter on the last drain and fill.
I have a feeling these transmissions are very sensitive to the proper type of fluid and keeping that Toyota T4 fluid fresh is important as well. I would say do a drain and fill (3qts) every 15-20k just to keep it relatively clean and to get the metallic particles removed from that magnetic drain plug as much as possible.
Trending Topics
Thread
Thread Starter
Forum
Replies
Last Post
LexusFL
LS - 1st and 2nd Gen (1990-2000)
17
10-10-22 04:17 AM