Ok was wondering what people run as I am in a band and weekends have heavy loads. I am running 36f and 40r at the moment from today on a trial as I sometimes get a lumpy feeling (possibly diff) like driving over thick white lines on the road that lasts for about five seconds then disappears. Looking on other forums it suggests this may be the diff due to tyre inflation?? They were at 33f 36r. It happens both under heavy load and with just me in the car. Every weekend I have about 150kgs of gear on board plus two passengers??
It's a 2007 tdv8. Can happen any time on flat or uphill. Only lasts about 5 seconds. Not so much a rumble as bumping as if driving over white lines in the road every second then after a few it stops!!