I've got a 2006 model TDV6. Been pretty happy with it. Had the 60K service a month or so ago. At the same time I replaced all 4 tyres with 205/50 VR 19 Vredestein Wintrac's. Ever since then (maybe it was just co-incidence) the steering feels very lumpy, especially at low speeds and definitely worse when starting up from cold. When you turn the wheel it feels heavy then goes light then heavy again as you turn it. I've checked the power steering reservoir, it's as it should be and no sign of any leaks.

Before I take it back to my LR dealer, anyone got any theories as to what this might be?

Could the tyres cause that effect? Hard to see how...

Thanks,

Robin

if noticeably worse when cold, my guess is the new tread/rubber - its a common report on Boxsters

Check the ball joints. Earlier cars had "light" ball joints that may fail. These have since been redesigned and are much beefier.

Are the tyre pressures correct? I think vredestein suggest running them at higher pressures than LR put on the door sticker. RRS TDV8 Buck Blue (no, not now in my dreams). ..........D3 TDclankety clankV6 ............BMW 318i

Thanks for the various suggestions. Is checking the ball joints something I can easily do myself or do I need to go to a LR dealer for that?

Tyre pressures are running at the Vredestein recommended values (+6 psi wrt standard).

For anyone whose interested this turned out to be a half-seized universal joint at the base of the steering column. According to the LR dealer mechanic who fixed it (a nice, genuine guy who I've known for several years) it's the first time he's come across this on a RR Sport (that's only 3.5 years old) but apparently it's quite a common fault on older models of Discovery. Not expensive to fix and it's certainly nice to have my silky smooth steering back again

Thanks for taking time to close the loop