Vibrating BullBar

I had the exact same setup on my Rodeo and didn't have a prob with a polar spring mounted antenna. What I did notice though was that the body moved around alot with respect to the bullbar.

Leroy

Signman,

It is a common problem with the Jackaroo as well as the Rodeo. you will find a big gap, or there should be one between the wing of the bull bar and the guard. This allows the body to flex.

From what I have noticed is the body moves a lot on the chassis, and for the body to flex the chassis must also be moving. In a way this is good. It means that on uneven tracks or rock hopping the body will flex a little and not crack. On the road this is not so good as it means that the bull bar is now vibrating along with every thing that is attached.

Spring mounted aerials are the way to go the shorter the better, but this is not always possible. I have had a good run with the broom stick type aerial on a large spring. It stills moves about but it has not broken. I have had it on the Troopie for over 12 months and 65000km on some very rough roads and it is still going strong.

I don't think it would matter what suspension you have will solve the problem as I have seen the vibration with stock vehicles as well as tricked up ones. All vehicles vibrate and flex, some more than others.

Wayne

Signman,

My old Jackaroo used to have the same problem so I tried all sorts to fix it. Thought it was the brackets down to the chassis causing the problem so I joined them together to reinforce them against vibration. Tried drilling an extra bolt hole but this did not work. Came to the conclusion in the end that it was something I had to live with.

Cheers,
Matt

I use GME 4705 antenna's, 120k's on 2.8TDi Rodeo, 60k's on 3.0TDi Jack and 50k's on 3.0TDi Rodeo and all holding up well with no apparent signs of fatigue

Cheers,

Dion

Hi Signman,

It seems to me that your chassis is virating uncontrollably on these corrugations and as your bullbar is mounted directly to it you can actually see what the chasis is doing. Sooner or later this will take it's toll on your body mounts and rubbers too.

I would upgrade the shock absorbers on the vehicle to some very heavy duty big bore oil shockies (like Koni's) as this is the part of your suspension system that is designed to try and control this issue. Remember some shockies seem to work fine when they are cold or working normally on the bitumen but hours of corrugations can make some of the best shockies (especially gas shocks) almost totally lose their ability to absorb corrugations.

Just my 2 cents and good luck in solving this issue.

Brett