loud knocking at 50-60mph

hi all how are you all keeping. first time post here so here goes I've owned my RR for 2 years now relatively hassle free few small issues but general wear and tear. now I have a 2005 l322 3.0d with roughly 135000 miles. now I am having a really weird issue of which the vehicle is making a loud clunking or knocking sound only at roughly 47-60mph which first started at between 55 and 60 but has now became much more pronounced it doesn't get louder with a change In speed up wards but if breaking at these speeds you can really hear it clunking at roughly 2-3 clunks a seccond until either below 50 or above 60 mph it is a lot more noticeable when breaking or if the car is slowing on its own. I had a quick look under the car with the suspension raised and cv joints looked fine but I would expect to be able to hear it at other speeds if it where a cv joint or bearing. now after a few read ups on here I believe it may be something to do with either the prop or the torque converter any one had any similar issues or anyone who posted with the same problem could you let me know what it was as none of the forum post actually stated what the problem was and they had no other posts so imagine they got it sorted. cheers for taking the time to read over my post and any help will be greatly appreciated

Welcome to the forum.

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https://www.landyzone.co.uk/forum/range-rover.10/

shimster thanks new on here thought I had sorry haha

Had a similar problem with 300 disco many years ago, could not see anything wrong underneath, only appeared at above 50mph, no vibration through steering wheel, just clunking noise, diagnosed when front wheels jacked up, front wheel bearing completely knackered, wheel only held on by large washer and bearing retaining nut.

Hi Roy thanks a lot for your input funnily enough someone else pointed out it may be a bearing but with the irregularity of it and with it being only happening between the 50-60mph made me eliminate that from the process but will get it on the ramp when I get back home. again the bloke who said it may be a bearing had the same issues as me and even with it jacked up and pull/push the tire at 12 and 6 there was still no play it wasn't until he took the wheel of it became apparent it was the bearing. also I forgot to add it is considerably more noticeable when on the motorway/highway and the suspension drop into motorway level if you lock it at standard height it still happens but is less pronounced.

Welcome to the forum