Cv joint

Hi would this(cv joint front passenger side) cause a vibration and a whining noise between 50-70mph, only I had the vcu replaced the other day and since then it started doing it.
Thank you

A worn in-board CV can cause vibration under acceleration, but it can't cause a whining noise.

If it only started after replacing the VCU, then you need to question the VCU, or other factors like tyres. Unless the VCU was new, or was reconditioned by Bell Engineering, then it needs testing with the One Wheel Up Test. Also you MUST have 4 identical tyres, with least worn on the rear.

Hi yeah was a bell engineering one and the tyres are all worn the same but the pressures were different and I pumped them up to all at 35psi but haven't yet trailed it out yet. I did drive it for a bit as a 2wd until the garage put the bell engineering one on. It's bugging me

TD4 Si said:

Hi yeah was a bell engineering one

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That's good.

TD4 Si said:

tyres are all worn the same

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Are the tyres the same? Same make, same type?

TD4 Si said:

but the pressures were different and I pumped them up to all at 35psi but haven't yet trailed it out ye

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35 Psi is too high (the correct pressure is 30 Psi), but more importantly all must be the same pressure.

OK will let out some air to bring them down to 30psi same size tyres different makes on the front compared to the back but they weren't doing it before the vcu change. Could it be the ird or would it do it all the time.

TD4 Si said:

same size tyres different makes on the front compared to the back but they weren't doing it before the vcu change

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It's vital that the tyres are the same, or the VCU will cause wind up, which will destroy the IRD.

TD4 Si said:

Could it be the ird or would it do it all the time.

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My guess is the IRD is complaining about the tyres being odd.

I run my TD4 at 32psi because I like the feel of the ride it gives.

I would do a 1 wheel up test - given experiences (mainly from a few years ago now) Bells are the best recon VCU to go for, but they are not infallible, so a test would be a sensible thing to do.

35psi is to high for most tyres. However, I run Maxmiler tyres on mine that by the book should be pumped to 40psi, I run them sightly under that on the Freelander though. So check with the tyre company on what is the best pressure.