Low speed vibration from 15-30mph - Lexus IS Forum
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post #1 of 5 (permalink) Old 02-28-2019, 08:38 PM Thread Starter
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Low speed vibration from 15-30mph

I have a 2005 IS300 with 123k miles on it, it has primarily been serviced at Lexus and have all the records of this when I bought it a couple months ago. When I'm accelerating at normal acceleration, let's say 30% throttle it vibrates/stutters a little bit from 15-30 mph then is completely gone. If I accelerate harder it doesn't happen. I have replaced plugs, transmission flush, rear diff fluid changed, new air filter, and cleaned the maf sensor. I have been doing tons of searches but can not find anything specific: from ujoints that are not serviceable to others who replace the whole driveshaft. If anyone has any input I would greatly appreciate it. When it was in the tranny flush and differential fluid change the Toyota tech looked it over and said car is very solid. Any ideas before I bring it back to them again?
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post #2 of 5 (permalink) Old 03-01-2019, 11:24 AM
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Originally Posted by wickers08 View Post
I have a 2005 IS300 with 123k miles on it, it has primarily been serviced at Lexus and have all the records of this when I bought it a couple months ago. When I'm accelerating at normal acceleration, let's say 30% throttle it vibrates/stutters a little bit from 15-30 mph then is completely gone. If I accelerate harder it doesn't happen. I have replaced plugs, transmission flush, rear diff fluid changed, new air filter, and cleaned the maf sensor. I have been doing tons of searches but can not find anything specific: from ujoints that are not serviceable to others who replace the whole driveshaft. If anyone has any input I would greatly appreciate it. When it was in the tranny flush and differential fluid change the Toyota tech looked it over and said car is very solid. Any ideas before I bring it back to them again?
I would look at the driveshaft and the mounts for the engine, tranny, and diff. Other than that, I would look at the wheels.
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post #3 of 5 (permalink) Old 03-01-2019, 06:37 PM Thread Starter
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Thanks for the reply! I will check those items, I would think if it was the wheels being out of balance it would happen more than just the low speed but I could be wrong. Just has me baffled as I’ve owned an 01 years ago and know it wasn’t like this and had about the same mileage but just wasn’t as old...
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post #4 of 5 (permalink) Old 03-02-2019, 05:52 AM
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Thanks for the reply! I will check those items, I would think if it was the wheels being out of balance it would happen more than just the low speed but I could be wrong. Just has me baffled as Iíve owned an 01 years ago and know it wasnít like this and had about the same mileage but just wasnít as old...
On wheels and tires. If a vibration comes in and stays at all speed. It may be something out of round. If the shake comes in and goes away at different speeds. It usually is a balance issue. If the shake is more in the steering wheel. It is the in the front. If in the seat rear. If kind of all over you get it.

I am glad you had the driveshaft checked by a driveshaft shop. The issues with it are hard to see. If you are not use to them.

Where your mounts good?
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post #5 of 5 (permalink) Old 05-29-2019, 09:24 PM Thread Starter
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So it took me longer then expected to get this figured out, I brought it back to the local Toyota dealership and they were able to find out that the driveshaft was the culprit. Replaced the driveshaft and now drives amazing.
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