|
[VIDEO] Loud thud, car shake while driving low rpm
hey guys, so I’m having this issue and I can’t get a grasp on what it could be. While driving, after the car is warmed up and after some driving, my car gives out a loud thudding from the rear and it’s so loud and violent that the entire car shakes. Only happens while rpm is low and the road has some imperfections. It feels as if something is slipping. The rpms shoot up while thudding and then drop back down. Initially I thought it was the diff so I found a used low mile one at a junkyard and swapped it out as well as swapping all the diff bushings to whiteline. I also changed the endlinks while I was at it. Overall the car is stiffer and the thudding isn’t as violent because of the new bushing but it’s still there. The only other thing I can think of is maybe the tires? |
rear axle shafts loose?
|
I'd get under it and pry around on every single suspension or driveline component to find out what's worn. If it had a bolt or a bushing then it has the potential to fail, also inspect for broken welds. Re-torque everything, including the subframe bolts.
Are you sure you don't have a slipping clutch? |
Originally Posted by SoCal04G35
(Post 7136677)
rear axle shafts loose?
Originally Posted by cleric670@gmail
(Post 7136678)
I'd get under it and pry around on every single suspension or driveline component to find out what's worn. If it had a bolt or a bushing then it has the potential to fail, also inspect for broken welds. Re-torque everything, including the subframe bolts.
Are you sure you don't have a slipping clutch? I just don’t get what could cause such a violent reaction. Makes driving unbearable. My tires are starting to wear out. Could that have anything to do with it? |
Check your AT fluid level, it could be running low on fluid then you get a sudden burst of torque as line pressure builds up.
|
Originally Posted by cleric670@gmail
(Post 7136689)
Check your AT fluid level, it could be running low on fluid then you get a sudden burst of torque as line pressure builds up.
|
Originally Posted by cleric670@gmail
(Post 7136689)
Check your AT fluid level, it could be running low on fluid then you get a sudden burst of torque as line pressure builds up.
|
What happens when you use a service jack to lift up the vehicle? Do you hear any wierd noise coming from the suspension as you raise it? Maybe indicating something is broken or severely worn.
Also if you have a sunroof equipped are you sure the sound isn't coming from the sunroof? |
Also, take out the trunk floor mat and both plastic dividers and check to make sure everything is securely bolted down like the spare tire/jack/HICAS controller, etc
|
Originally Posted by cleric670@gmail
(Post 7136709)
What happens when you use a service jack to lift up the vehicle? Do you hear any wierd noise coming from the suspension as you raise it? Maybe indicating something is broken or severely worn.
Also if you have a sunroof equipped are you sure the sound isn't coming from the sunroof?
Originally Posted by cleric670@gmail
(Post 7136712)
Also, take out the trunk floor mat and both plastic dividers and check to make sure everything is securely bolted down like the spare tire/jack/HICAS controller, etc
It feels as if gears are slipping. It cant be the diff since i swapped it to another one. I dont see how the tranny could be slipping since it doesnt give off erratic downshift or upshift. And still, somehow the rear just goes nuts and starts thudding and shaking the damn car. |
I'd recommend re checking the rear suspension. Maybe your diff bushing is completely screwed?
|
Originally Posted by Urbanengineer
(Post 7136721)
I'd recommend re checking the rear suspension. Maybe your diff bushing is completely screwed?
|
It sounds like your tranny is about to implode, I'd have it towed somewhere to be looked at. I've been involved in a massive transmission failure in the past and it wasn't a pleasant experience.
I don't know that anything not mechanical could cause the symptoms you are describing and it sounds like you've ruled out the diff. as a potential cause. |
Originally Posted by Blue Dream
(Post 7136746)
It sounds like your tranny is about to implode, I'd have it towed somewhere to be looked at. I've been involved in a massive transmission failure in the past and it wasn't a pleasant experience.
I don't know that anything not mechanical could cause the symptoms you are describing and it sounds like you've ruled out the diff. as a potential cause. |
Added a video to better help hear it. You can hear it a couple of times in the video.
|
| All times are GMT -4. The time now is 12:10 AM. |
© 2024 MH Sub I, LLC dba Internet Brands