Major vibration towing with D4 (in 2 brand new disco 4's)

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Originally Posted by LRD414

Basil, do you think you'd notice or hear the light application of brakes similar to the "fluttering" of HDC when the trailer stability system is active? I assume that it uses the brakes.

Scott

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Presumably the trailer assist would only be activating if needed, and assuming the vehicle knows the trailer is there. ie all the wiring is set up correctly with load on the indicators. With LEDs and no resistors or globes, I assume TSC would not be turned on.

When the D4 was first released LR stated and demonstrated with a Defender on a trailer that the electrics do not need to be connected for TSC to work.

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Originally Posted by laughto

I too have a similar issue, however not as severe. Mine is only noticeable on smooth bitumen roads when towing above about 80 - 85kph. My symptoms are a light 'shudder' for about 1 second, about half second of smooth, and then 1 second of light shudder and so on. Coming back from previous trip, did seem to be getting worse, however may have been my anxiety/imagination.

Car in for service next week, and is on issues to review.

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So after service, LR found worn controller arms and will replace when these are available. Hopefully this will solve my problem. Not sure if relevant to OP.

I had Control Arms replaced today under warranty. Have not been able to check the problem with the shuddering when towing.

Is it normal to do a Wheel Alignment when replacing these? I do not believe this was done.

It is required to do a wheel alignment after changing the arms or any bushes/ball joints. I'd be asking for the test reaults from the alignment, or some other hard evidence that it was done.

Cheers

Dan

On review of the doco, there was a line item for wheel alignment, however the report, which is what I was looking for originally is not attached to this. Phoned LR and asked for a copy. Couldn't find it on my file was the answer, but the Service Manager would email it to me b4 he left for the night. Has not arrived so will be on to it tomorrow morning first thing. Hopefully it exists!

Sent from my SM-G920I using AULRO mobile app

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Originally Posted by JamesAdelaide

Thanks Neil for the input, I will keep everyone posted.

Testing my boat with the MY13 D4 this week and towing a mates boat also try try and confirm a few things.

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So what was the verdict of the testing James?

Scott