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

Hi James Just a though my son brought the new D4 2016 when I was looking over and under it I noticed that the swinging weights underneath at rear were cable tied up so they wouldnt swing. Said to my son you have gotta let those things swing or you may end up with vibration etc. Just a thought

Hmmm swinging weights? Not sure I follow, could you ellaborate?

Have a look under the rear bumper at the corners. Big rubber mounted pendulum weights designed to stop vibration / harshness issues.

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Originally Posted by LRD414

James, IIRC someone on here had a faulty tailshaft uni joint replaced at very low km's (or possibly whole tailshaft replaced) only last year.
From memory I think it was "Nicky". Not sure of exact symptoms but certainly some vibration.

Cheers,
Scott

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Yes, Nicky here, it was me. The whole rear drive-shaft is not an expensive part, and as I recall it was not LR but a 3rd party supplier. Eventually this was the culprit, even after a new E-diff replacing the original made no difference. All this when the car was new and had done under 1k.

Thanks Nicky.
They did replace the diff and the left hand drive shaft.
Just to be clear yours was a driveshaft (from the diff to wheel) not tailshaft issue (sorry if I'm using the wrong terminology).

Re the pendulum weights, yep, mine are 'free'.
Darn strange seeing them for the first time... wow.

Hi James,
Sorry to hear your first Land Rover experience has not been all grins :mad:.

Not sure if this help, but may go some way to eliminating the "batch issue". In Feb I picked up my new SDV6 MY16, a Nov 15 build and Jan 16 compliance. I tow a similar setup - Stejcraft 640 on a Dumbier tandem with 13" rims with over-ride brakes, all up about 1800kg I guess. I have not had any problems, although mainly flat freeway driving so far. Previously I towed the same set up with a D3 TDV6 also with no dramas on lots of roads for a few years.

I have noticed though that the D4 standard hitch has the trailer about 50mm nose down compared to dead level on the D3 with its Mitch Hitch. But this should not create these vibrations.

I'm sure you will get it sorted soon and the perma-grin with appear :D

Thanks Andrew, kind of rules out the batch issue as ours is Nov 19th 2015 build and Jan 2016 compliance. Cheers for the feedback too, I might try the towbar upside down to lift it.

But as you said, I've fiddled with lots of trailer weights/hitch heights over the years and none of them affect such a major vibration.

Quote:

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Originally Posted by JamesAdelaide

Thanks Nicky.
They did replace the diff and the left hand drive shaft.
Just to be clear yours was a driveshaft (from the diff to wheel) not tailshaft issue (sorry if I'm using the wrong terminology).

Re the pendulum weights, yep, mine are 'free'.
Darn strange seeing them for the first time... wow.

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James, it was the rear tail-shaft, your "driveshaft" definition, is an axel

I remember this thread from a couple of years ago.
http://www.aulro.com/afvb/d3-d4-rrs/...ter-2-a-2.html
Sound familiar?

Thanks rufusking, in fact the service manager referenced I think the same person/car and reckons in the end it was the float...

I will try and contact Ruby2 and find out what the resolution was.

James