Deceleration noise
Thread Starter
Lead Lap
Joined: Aug 2001
Posts: 4,540
Likes: 936
Deceleration noise
Anyone notice when you lift the gas off after acceleration at around low city speeds and the engine shuts off, there is a soft thump noise that comes from the rear? Maybe around the differential area.
this may coincide with switching to regen.
or is it just an issue with mine?
this may coincide with switching to regen.
or is it just an issue with mine?
Thread Starter
Lead Lap
Joined: Aug 2001
Posts: 4,540
Likes: 936
Driver School Candidate
Joined: Aug 2012
Posts: 24
Likes: 5
From: TX
Advanced
Joined: May 2019
Posts: 602
Likes: 193
From: Florida
I don't think you can really check the ECVT fluid level, without actually taking out the fluid. No dipstick, sealed, lifetime, etc. Has been discussed to no end on the regular GS 350 forum. We haven't really discussed the transmission fluid change on the Hybrid forum. It gets nasty it seems as people are very opinionated on the topic. But good luck. To second IM2bz comment, no sound from rear when ICE shuts down. I only really notice the engine starting or stopping when it is first warming up in the morning. Unless I step on the gas a little. Like I did this weekend when I stepped on it, got it to over 90 like nothing, and had to back off. My fiance said she knew I did something, but did not know what I got up to. It was that quick and smooth. Wish I drove highways more.
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Thread Starter
Lead Lap
Joined: Aug 2001
Posts: 4,540
Likes: 936
The way to check it is to open the fill plug and pump the Toyota WS fluid in. The car has to be level to +/- 1 degrees.
I can use a syringe to do this so I can measure how much goes in before the fluid comes back out.
yes definitely something funky is going on with mine when the ICE cuts off.
I can use a syringe to do this so I can measure how much goes in before the fluid comes back out.
yes definitely something funky is going on with mine when the ICE cuts off.
Last edited by 703; Mar 18, 2020 at 03:44 AM.
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3rd Gear
Joined: Jun 2024
Posts: 3
Likes: 1
Me too
Anyone notice when you lift the gas off after acceleration at around low city speeds and the engine shuts off, there is a soft thump noise that comes from the rear? Maybe around the differential area.
this may coincide with switching to regen.
or is it just an issue with mine?
this may coincide with switching to regen.
or is it just an issue with mine?
Did you manage to find out what was causing it in your car?
Lexus Champion
Joined: Nov 2014
Posts: 13,614
Likes: 2,921
From: Texas
I only have a cool little silent twisting torque movement when the EV motor activates/deactivates while sitting for a red light to change...
3rd Gear
Joined: Jun 2024
Posts: 3
Likes: 1
Mine too
Anyone notice when you lift the gas off after acceleration at around low city speeds and the engine shuts off, there is a soft thump noise that comes from the rear? Maybe around the differential area.
this may coincide with switching to regen.
or is it just an issue with mine?
this may coincide with switching to regen.
or is it just an issue with mine?
Intermediate
Joined: Dec 2009
Posts: 479
Likes: 96
From: Sydney
You didn't mention the age and mileage and service history?
I would put the car on a hoist or jack stands and first check if the driveline coupler has too much slack or the rubber has deteriorated and also check the differential and transmission mounts.
I would put the car on a hoist or jack stands and first check if the driveline coupler has too much slack or the rubber has deteriorated and also check the differential and transmission mounts.
3rd Gear
Joined: Jun 2024
Posts: 3
Likes: 1
Mine too
I have booked it in with Lexus to take a look on Friday 5 July. Will let you all know what they find.
Intermediate
Joined: Dec 2009
Posts: 479
Likes: 96
From: Sydney
Last year when I was looking and test driving another GS450h 2015, this one had about 60k km. You can tell it was neglected even with Lexus stamps in the book. The diff or wheel bearings had a grumbling whine when coasting above 60km/h and it wasn't the mismatched tyres.The transmission when transiting from petrol to EV and back to petrol had a noticeable backlash. I went around the block and returned the keys straight away. No thanks and kept looking.
Last edited by gripau1; Jun 23, 2024 at 04:17 PM.
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