GSLexi350

Hello,

Purchased a 2013 GS350 with 150,000 km from a private sale in August 2023 with safety. After bringing it home, it had a shake and an intermittent shudder. We took it to the dealership and they did alignment which fixed the shake and drained the transmission fluid because it had been overfull upon inspection. The techs said the colour looked great and there was no shudder for about 2 months. However, it just started to come back again. It feels like a slip that happens right around 40-60. It's hard to replicate it so it's difficult for the techs to catch sometimes.

Has anyone experienced this before? In Barrie, Ontario FYI

Thank you

bclexus

The transmission should have never been touched...

Mangsailor

Does it happen steady-state driving like cruising, or when accelerating? What's the rpms at this point? Eco or regular or S driving mode?

jgscott

iTrader: (1)

Is it back to the same thing you were feeling before your alignment and trans fluid drain. Same exact or different?

Is it a skip/shudder shake? Or is it a slipping. ex.( do you see or feel the rpm go up slipping).

Is this a RWD or AWD?

What you could be feeling could be a Ignition miss. Feels like a Trans problem sometimes. Could be a bad coil, or plug. They can be minor, and sometimes take a long time to code at all until it become multiple random misfire codes. Bad fuel pump could do also. Also what dealership did the work? Lexus? If not Lexus, what Trans fluid did they use? Did they do a OBD scan?

GSLexi350

Light acceleration, low rpm between 1250 to 1750, happens in every mode

GSLexi350

Yes same thing as before, except the shaking was fixed by the alignment.

It slipping at low rpm around 1500.

Awd

Thanks so much for your reply. . Really hope it's something simple like a coil or plug.

Lexus dealership. They only did a drain for the trans fluid. It was overfilled by previous owner so we don't know what fluid they used unfortunately. They did OBD scans and nothing came up.

bclexus

@GSLexi350 :



When will Lexus 4th Gen GS 350 owners ever learn!



. . . . . . . . . . . . . . . . . .
► The transmission should NEVER EVER be touched - by anyone - PERIOD!

You may have to pay the price for the previous owner's disregard of Lexus' clear standard not to service the transmission. I'm guessing the previous owner thought it was an intelligent thing to do by following the recommendation of certain people on this 4GS forum to replace the ATF or do D&Fs even though Lexus does NOT recommend the transmission fluid EVER be replaced, and most Lexus dealerships will refuse to do it if asked. Some people think they know better than the original car maker equipment engineers! Amazing!

When an automatic transmission is overfilled with ATF the fluid will typically foam by churning in air bubbles, which in-turn will cause slipping and usually significant clutch wear. It makes no difference what the ATF looked like when it was drained - overfilling had already possibly done its damage. Oftentimes the damage caused by overfilling the transmission will last the remainder of the transmission's life, which by logical reasoning its life will probably be shortened due to the overfilling. Sadly, there is no remedy or fix after the damage takes place except to rebuild it, which could have been avoided if only Lexus' recommendation that the transmission is never to be serviced had been followed.

These transmissions (with the original Type WS transmission fluid) have been known to perform flawlessly well past ¼ million miles. Unfortunately, if the shudder/slipping you are experiencing is caused by the previous owner's negligence, by following bad advice to replace the ATF, it sounds like your transmission will probably not live as long as it could have...

I hope you learn that your transmission hasn't been damaged and it's something minor and inexpensive.

Here in the U.S. Lexus' protocol for transmissions in need of repair (beyond something minor like replacing a shift solenoid) is to just replace the transmission with a fresh rebuilt transmission from a trusted local transmission shop. They'll give the local shop your transmission as a core for it to be rebuilt for the next customer that needs one. Of course there's a significant cost to replace the transmission - something I hope you don't need done.

You said you purchased the 2013 GS350 with 150,000 km from a private sale last August 'with safety'. I don't know what the term 'safety' means. Does it mean the car has a warranty or that you had it inspected by a mechanic before buying it? I'm just curious to know what that term actually means. If 'safety' means it was looked-over and driven by a mechanic, it would be next to impossible for someone to test drive and inspect a vehicle to find it had a damaged transmission because problems typically don't show up until the fluid is at typical operating temperature which can take many minutes of driving, or might not show itself for many months . Let's hope the problem is something minor and inexpensive.