# 2021 Buick LeSabre - Thunks **URL:** \ **Category:** Maintenance/Repairs\ **Tags:** buick\ **Created:** [December 11, 2020, 12:29pm UTC](https://community.cartalk.com/t/2021-buick-lesabre-thunks/173214 "2020-12-11T12:29:39Z")\ **Posts on this page:** 15\ **Page:** 1
**Author:** ![jimmgabe\_172875](https://avatars.discourse-cdn.com/v4/letter/j/41988e/32.png) [@jimmgabe\_172875](https://community.cartalk.com/u/jimmgabe_172875)\ **Post date:** [December 11, 2020, 12:29pm UTC](https://community.cartalk.com/t/2021-buick-lesabre-thunks/173214/1 "2020-12-11T12:29:40Z")
It isn’t consistent, but when accelerating suddenly from from a full stop, like from a stoplight, or the on-ramp of a highway, it feels and sounds like the transmission is moving. It is a dull, thunk sound, like u-joints would make in an older car, except this sound seems to come from the place where the transmission connects to the motor, underneath the center console. Mechanics couldn’t reproduce the sound. It runs and shifts just fine, but occasionally feels like the transmission is about to drop! ---
**Author:** ![oldnotdeadyet](https://avatars.discourse-cdn.com/v4/letter/o/a6a055/32.png) [@oldnotdeadyet](https://community.cartalk.com/u/oldnotdeadyet)\ **Post date:** [December 11, 2020, 1:29pm UTC](https://community.cartalk.com/t/2021-buick-lesabre-thunks/173214/2 "2020-12-11T13:29:14Z")
Check your state’s lemon laws, and document, document as you attempt to get this problem corrected. Take a tape recorder on your drives. ---
**Author:** ![VOLVO-V70](https://avatars.discourse-cdn.com/v4/letter/v/8e8cbc/32.png) [@VOLVO-V70](https://community.cartalk.com/u/VOLVO-V70)\ **Post date:** [December 11, 2020, 2:06pm UTC](https://community.cartalk.com/t/2021-buick-lesabre-thunks/173214/3 "2020-12-11T14:06:17Z")
I don’t see a Buick LeSabre listed for 2021 so what year is this vehicle ? ---
**Author:** ![jimmgabe\_172875](https://avatars.discourse-cdn.com/v4/letter/j/41988e/32.png) [@jimmgabe\_172875](https://community.cartalk.com/u/jimmgabe_172875)\ **Post date:** [December 11, 2020, 10:46pm UTC](https://community.cartalk.com/t/2021-buick-lesabre-thunks/173214/4 "2020-12-11T22:46:46Z")
It’s a 2005, the last year they were made ---
**Author:** ![jimmgabe\_172875](https://avatars.discourse-cdn.com/v4/letter/j/41988e/32.png) [@jimmgabe\_172875](https://community.cartalk.com/u/jimmgabe_172875)\ **Post date:** [December 11, 2020, 10:47pm UTC](https://community.cartalk.com/t/2021-buick-lesabre-thunks/173214/5 "2020-12-11T22:47:26Z")
Good tip! Thanks! ---
**Author:** ![VOLVO-V70](https://avatars.discourse-cdn.com/v4/letter/v/8e8cbc/32.png) [@VOLVO-V70](https://community.cartalk.com/u/VOLVO-V70)\ **Post date:** [December 11, 2020, 10:50pm UTC](https://community.cartalk.com/t/2021-buick-lesabre-thunks/173214/6 "2020-12-11T22:50:13Z")
> [@jimmgabe\_172875](#): > > Good tip! Thanks! I hope you don’t think that the lemon laws will apply to this 15 year old vehicle because they don’t. ---
**Author:** ![oldtimer-11](https://avatars.discourse-cdn.com/v4/letter/o/e79b87/32.png) [@oldtimer-11](https://community.cartalk.com/u/oldtimer-11)\ **Post date:** [December 11, 2020, 10:56pm UTC](https://community.cartalk.com/t/2021-buick-lesabre-thunks/173214/7 "2020-12-11T22:56:03Z")
Put a wrench on the engine to transmission bolts and see if they are lose. Also check the motor and transmission mounts. Check all the engine cradle bolts. ---
**Author:** ![VDCdriver](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/vdcdriver/32/30_2.png) [@VDCdriver](https://community.cartalk.com/u/VDCdriver)\ **Post date:** [December 11, 2020, 10:58pm UTC](https://community.cartalk.com/t/2021-buick-lesabre-thunks/173214/8 "2020-12-11T22:58:45Z")
> [@jimmgabe\_172875](#): > > this sound seems to come from the place where the transmission connects to the motor, underneath the center console. > [@jimmgabe\_172875](#): > > It’s a 2005 Your 2005 Buick has _Front Wheel Drive_, and as a result the engine connects to the transmission under the hood, adjacent to the left (?) front wheel, not underneath the center console. It is entirely possible that you have one or more bad motor mounts or transmission mounts, so I think that you need to seek yet another mechanic. ---
**Author:** ![jimmgabe\_172875](https://avatars.discourse-cdn.com/v4/letter/j/41988e/32.png) [@jimmgabe\_172875](https://community.cartalk.com/u/jimmgabe_172875)\ **Post date:** [December 11, 2020, 11:10pm UTC](https://community.cartalk.com/t/2021-buick-lesabre-thunks/173214/9 "2020-12-11T23:10:58Z")
Thanks, but no, I didn’t think they would. But it’s a good thing to know for future reference. ---
**Author:** ![jimmgabe\_172875](https://avatars.discourse-cdn.com/v4/letter/j/41988e/32.png) [@jimmgabe\_172875](https://community.cartalk.com/u/jimmgabe_172875)\ **Post date:** [December 11, 2020, 11:12pm UTC](https://community.cartalk.com/t/2021-buick-lesabre-thunks/173214/10 "2020-12-11T23:12:30Z")
Didn’t know that, thanks. I will make another attempt with another mechanic. ---
**Author:** ![jimmgabe\_172875](https://avatars.discourse-cdn.com/v4/letter/j/41988e/32.png) [@jimmgabe\_172875](https://community.cartalk.com/u/jimmgabe_172875)\ **Post date:** [December 11, 2020, 11:13pm UTC](https://community.cartalk.com/t/2021-buick-lesabre-thunks/173214/11 "2020-12-11T23:13:44Z")
Thanks. I’m not mechanically inclined, but I will find someone who is and ask them to check those exact things. Thanks for the tip. ---
**Author:** ![bing](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/bing/32/4619_2.png) [@bing](https://community.cartalk.com/u/bing)\ **Post date:** [December 11, 2020, 11:13pm UTC](https://community.cartalk.com/t/2021-buick-lesabre-thunks/173214/12 "2020-12-11T23:13:53Z")
Well yeah that and I’d have the CV joints checked and the flywheel bolts etc. At that age could be anything up there coming loose. Really I think a transmission shop might be more helpful in detecting a drive train noise. ---
**Author:** ![jimmgabe\_172875](https://avatars.discourse-cdn.com/v4/letter/j/41988e/32.png) [@jimmgabe\_172875](https://community.cartalk.com/u/jimmgabe_172875)\ **Post date:** [December 11, 2020, 11:15pm UTC](https://community.cartalk.com/t/2021-buick-lesabre-thunks/173214/13 "2020-12-11T23:15:55Z")
Thank you very much. I will add those connections to the list, and also try the transmission shop. Great idea! ---
**Author:** ![VDCdriver](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/vdcdriver/32/30_2.png) [@VDCdriver](https://community.cartalk.com/u/VDCdriver)\ **Post date:** [December 12, 2020, 12:32pm UTC](https://community.cartalk.com/t/2021-buick-lesabre-thunks/173214/14 "2020-12-12T12:32:38Z")
> [@jimmgabe\_172875](#): > > I will add those connections to the list, and also try the transmission shop. Just be sure that you go to an independent trans shop that has been in business for at least 3 years. Do **NOT** go to a chain-operated trans shop such as Lee Myles, Cottman, Mr. Transmission, or–the worst of the worst–AAMCO. They will tell you that you need a new transmission, even if only a relatively minor repair is necessary. ---
**Author:** ![jimmgabe\_172875](https://avatars.discourse-cdn.com/v4/letter/j/41988e/32.png) [@jimmgabe\_172875](https://community.cartalk.com/u/jimmgabe_172875)\ **Post date:** [December 12, 2020, 12:58pm UTC](https://community.cartalk.com/t/2021-buick-lesabre-thunks/173214/15 "2020-12-12T12:58:02Z")
Thanks, I will remember that. Generally don’t trust big chains, anyway. And I’m sure the transmission is ok. Had the fluid changed when I first bought the car, thinking that might fix it!