Build Threads Details on Club Lexus LS400 owner vehicles

Transmission shudders after accelerating.

Old 03-09-19, 09:27 AM
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Default Transmission shudders after accelerating.

'95 LS400. When I take my foot off of the gas, regardless of how much or little I'm accelerating, the car shudders , front to back. It is intermittent but goes away wvery time I move the shifter to "3". Engine and transmission mounts are new. I think it is obvious that the transmission has an issue. Is this a common known issue?,
loeb is offline  
Old 03-09-19, 07:43 PM
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If this happens around 45 mph, it's probably an issue with the ECU called "throttle shock" [1, 2]. My '95 does this as well. The fix is to install an appropriate replacement ECU (see thread 2 for the part number, which depends on the VIN and whether or not it's a California car). At some point I intend to search some junkyards for such an ECU, or else shell out the $200 for a refurbished one online.
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Old 03-23-19, 01:12 AM
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Maybe another case of the use of maxlife transfluid.
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