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Old 22-12-2017   #1
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Vibration/shuddering/judder under acceleration

Hi everyone, traded my twinair punto for a AGP Today, and wasnít able to get the car on a fast test drive, on the way home unfortunately I noticed a vibration/juddering only when accelerating. The car has been lowered so Iím wondering if itís driveshafts? Gearbox seems good but did contemplate differential? Any help greatly appreciated, hoping I havenít bought myself a dog 😔
Ash
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Old 23-12-2017   #2
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Re: Vibration/shuddering/judder under acceleration

Driveshafts... not cheap.. but simple..
Are you going to stick with current rideheight?
Charlie
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Old 23-12-2017   #3
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Re: Vibration/shuddering/judder under acceleration

Could be a number of things..

Check tyre pressures first.
Check wear pattern as it could be tracking and poor alignment.
Overall tyre condition ok?
Could be wheel balancing.

Always check the simplest things first....well thats my mantra
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Old 20-01-2018   #4
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Re: Vibration/shuddering/judder under acceleration

Quote Originally Posted by varesecrazy View Post
Driveshafts... not cheap.. but simple..
Are you going to stick with current rideheight?
Charlie
Hi there, and sorry for the slow reply. I’ve been told there’s a part that runs through the centre of the gearbox that could be worn, but struggling to find a name and part number!

I was told driveshafts are less than 6 months old but I’m not ruling them out!

I’ve removed the coil over kit now as it was stupidly low and this has improved the shuddering/judder loads, but it’s still evident when pushing hard, seems worse in 4th although this could be my imagination.

She’s had a gearbox rebuild so I’m hoping it’s not a sign of bearing failiure as the gearbox seems quiet other than that!

Many thanks for the reply’s ����

Ash
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Old 20-01-2018   #5
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Re: Vibration/shuddering/judder under acceleration

Here she is
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Old 20-01-2018   #6
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Re: Vibration/shuddering/judder under acceleration

What have you replaced the coilovers with?..did you change the top mounts too?

Coilovers can play havoc with the driveshafts and whilst I know you said they were 6 months old do you know if they were a quality part ?..irrespective they could be fubarred ..BUT your only getting the noise/juddering in a certain gear at certain revs/load?...
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Last edited by nikrox; 20-01-2018 at 16:41.
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Old 20-01-2018   #7
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Re: Vibration/shuddering/judder under acceleration

Im going through the same but with a tjet grande (5 speed box) running standard suspension

Shuddering 3/4th under load when torque comes in 3-4k rpm

Wheels and tyres have been replaced new
Complete new genuine right hand side driveshaft

Still no different, got a new inner joint and cup to put on the left side soon
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Last edited by Boostjunkeee; 20-01-2018 at 21:27.
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Old 21-01-2018   #8
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Re: Vibration/shuddering/judder under acceleration

Engine mounts ??

- verify no obvious excessive play with a crow-bar
- engine running,
- hand-brake on
- engage 2nd gear and simulate a real pick-up
- if you hear the noise it's probably a bad mount
- if not you probably face a (2) worn cup/spider ...

Worth to have a look also at the exhaust pipe ;-)

BRs, Bernie

If someone here helped You fix -or better, understand- your issue, hit the thanks icon @ bottom right corner, it's free and makes us feel helpy ;-)
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Old 21-01-2018   #9
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Re: Vibration/shuddering/judder under acceleration

Quote Originally Posted by nikrox View Post
What have you replaced the coilovers with?..did you change the top mounts too?

Coilovers can play havoc with the driveshafts and whilst I know you said they were 6 months old do you know if they were a quality part ?..irrespective they could be fubarred ..BUT your only getting the noise/juddering in a certain gear at certain revs/load?...
Hi mate, Iíve replaced the suspension with a Koni original set up, the ride height and dampening are of original specs, and also fitted genuine top mounts, new tyres, refurbished wheels. I have the receipt for the driveshafts and they where £597+vat, I canít feel any obvious play in the driveshafts but I know obviously that doesnít mean a lot! And I suppose the coil overs could have damaged them, it was very low!

So the shudder is definitly in all gears but only under hard acceleration, once your cruising it goes away, or if you accelerate gently itís hardly noticeable!

Many thanks for any help

Ash
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Old 21-01-2018   #10
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Re: Vibration/shuddering/judder under acceleration

Its going to sound daft but have you considered checking the gearbox fluid?..

if its getting 'used vigorously' then maybe the fluid has degraded..

any leaks?..
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Old 22-01-2018   #11
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Re: Vibration/shuddering/judder under acceleration

Quote Originally Posted by nikrox View Post
Its going to sound daft but have you considered checking the gearbox fluid?..

if its getting 'used vigorously' then maybe the fluid has degraded..

any leaks?..
Customer: My computer doesn't start ...
Help-desk: Is the wall-plug in ?
Customer: What do you mean "wall-plug" ?

I hope we are not in that kind of scenario ;-)

BRs, Bernie
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Old 27-01-2018   #12
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Re: Vibration/shuddering/judder under acceleration

Just sorted mine with new left hand inner joint and cup, also replaced the gearbox mount (left hand side) as was split
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