Juddering van

[mellieha@protonmail.]

I have a 2018 Renault Kangoo van. The problem is that it judders between 45 and 65mph. I've changed the wheels round and fitted four new tyres but it's still doing it. Any help gratefully received.

 

[Burnerman]

I guess this is when you are driving along, not braking or whatever?
Does the steering wheel judder too?
Hopefully your wheels were balanced when the new tyres were fitted? This has to be the main suspect just now and I hope they checked for buckled rims!
John

 

[mellieha@protonmail.]

Yes it's when I'm driving not braking. The steering wheel judders too. I had all four wheels balanced at a reputable tyre shop. I don't know if it makes any difference but if I freewheel at those speeds there's no judder but as soon as use my accelerator pedal it starts juddering

 

[Harry Bloomfield]

Have the CV joints and drive shafts checked.

 

[mellieha@protonmail.]

I've had the bushes checked but they're only slightly worn so wouldn't cause juddering. Could either of those cause it do you think?

 

[Burnerman]

In awkward cases, find a tyre shop that can balance your wheels on the car.
At the same time, do check for front wheel bearing wear.
John

 

[mellieha@protonmail.]

Thanks John I will do

 

[carmanmemoranda]

Yes it's when I'm driving not braking. The steering wheel judders too. I had all four wheels balanced at a reputable tyre shop. I don't know if it makes any difference but if I freewheel at those speeds there's no judder but as soon as use my accelerator pedal it starts juddering

Has to be drivetrain related then.

Shafts and joints is the sensible call to check 1st.

But to be clear, we aren't confusing it with loss of power, misfire etc? Any engine light or codes ?

 

[mellieha@protonmail.]

No the power is normal. No misfiring and no warning lights. Would you say the driveshaft could be the problem?

 

[Harry Bloomfield]

No the power is normal. No misfiring and no warning lights. Would you say the driveshaft could be the problem?

If the judder eases, when you take your foot off the accelerator, then it is likely something to do with the drive-train.

Take the car to a large, empty, open car park, where you can drive in circles. Drive in tight LH circles, then tight RH circles, with window open. See if you see or hear any strange noises.

 

[carmanmemoranda]

No the power is normal. No misfiring and no warning lights. Would you say the driveshaft could be the problem?

Not 100,%, could even be gearbox or other faults.

But if it only happens when accelerating and not braking or freewheeling and it isn't misfire or lack of power it has to be related to the drivetrain

 

[Burnerman]

Two years ago I had a Berlingo in with a distorted front hub........80 thou out! Reason unknown but I suspect that some clot had put a new wheel bearing in, without a clue.
John