Grinding Noise After 50mm Lift - Traction Control Activating

Thanks so much Michael - that is likely what may have happened here.  I figure if the sensor or wiring itself has been damaged, I would probably get a warning or error code.  Because the symptom is more that the traction control cuts in early, I think your point about the mount being bent might be a good one!  I will have a look at the sensor area tonight.

I have just encountered the same problem JB74 LCV (abs braking nearside wheel when cornering at about 45Mph) after a 50mm lift and 225/70/16 Extreme XJ03 wheels. Potentially dangerous especially in the wet. It was explained to me that it is caused by the rotational relationship of the inside and outside wheels being increased due to a wider track and increased wheel size causing the vehicle to think it is in a skid? Suzuki dealership believed they could software out the problem but after two visits they have not cured the problem. Not sure where to go from here??

Surely though I would have thought that if all 4 wheels are the same size while the actual wheel speed for any given road speed is lower than standard the relative wheel speed difference between them cornering is as expected? It's not like having one wheel bigger than the other?

My immediate thought is the 235's are a possible problem. It does warn in the manual that increasing the tyre size can effect the ABS ect.
There's probably nothing that will change that other then slowing down around corners.
Cars are getting a lot smarter and the downside to that is the more you change them from factory spec the more confused they get as the data they receive to make decisions is very different from what is actually happening.
They might come up with an update to fix this but I doubt suzuki will, it allows them to remove the entire drive train from any warranty claims and that saves them money.

I would say the new Jimnys traction control/ crash alert is very sensitive. I can get mine to activate maybe once a week or so. Usually it kicks in when it thinks it’s going to crash into a pedestrian who’s actually walking along a path but the car doesn’t know the difference between the road and pavement. This I do find dangerous when you are not prepared for this to happen and the car is trying to brake when you’re happily driving along with other traffic around you. The traction control will also kick in going round corners and roundabouts if you push them probably above 30mph or so depending on road conditions. Now all my 3 JB74s have BFG 215/75/R15 Mud terrains and I accept that mud terrains on the road actually aren’t that grippy compared to a standard or all terrain tire so I think that’s something to bear in mind. Usually when I’ve had the traction control kick in I will agree with it that I was probably going too fast for the Jimny to handle even though the car feels ok whereas my old Gen 3s rear end on similar mud tires used to love sliding around and spinning away pulling away at traffic lights. So I think tires and a heavy right foot is the problem along with a sensitive car. 

HachiRocker wrote:

Hi all,

I have tried searching but haven't been able to find any answers, and I'm very new to the world of Jimnys so please excuse me if this is a dumb question.

I have a brand new JB74 (with only 50km on the clock).  The car has a 50mm Ironman lift which I installed myself.  When I go around left-hand corners with a bit of speed (50 - 60kph), I get a horrible grinding / rubbing noise and vibration from underneath the car.  It doesn't happen all the time but I seem to be able to induce it by braking lightly or decelerating while turning using engine braking.  This only happens through left-hand turns, not right.  It also does it with and without a passenger on board.

At first, I thought it may have been the ABS activating, but then realised I didn't need to brake to make it happen.  The ABS light also does not illuminate when this happens.  I also thought it could be the prop shaft rubbing against the cross member, however, I have fitted cross member drop brackets and I note that the sound mostly comes when the car is decelerating (ie. when the nose is pitched down and I assume the prop shaft moves away from the cross member).

The problem persists regardless of whether I have the stock wheels and tyres on the car, or my 235/70/R15s (on 15 x 7 rims).

Has anyone experienced anything like this or have any clue about how I could diagnose the issue?

Thanks so much for your help!

Kind regards,
HR

What are you running your tyre pressures at? 
With the size tyres you are using your pressures should be around 22psi.