Bump steer ?

[Kyle10]

Anybody see anything standing out that could be an issue with causing bump steer ?

EVO 4.5 upper and lower control arms
Synergy track bar riser bracket
Synergy sector shaft brace
Falcon stabilizer

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[DylanM]

Your track bar and drag link aren't parallel. They're close to parallel, but close just means the bump steer won't be as bad as it could be if they were farther off.

Something else to consider is your tire size and wheel offset choice may have resulted in excessive positive scrub radius. If so, this will tend to make the steering more susceptible to getting pulled to either side when you hit uneven surfaces in the road (potholes, bumps, areas of different traction, etc).

 

[Kyle10]

Do you think I should remove flip kit ? That would put drag and track bar more inline ?

 

[Kyle10]

Your track bar and drag link aren't parallel. They're close to parallel, but close just means the bump steer won't be as bad as it could be if they were farther off.

Something else to consider is your tire size and wheel offset choice may have resulted in excessive positive scrub radius. If so, this will tend to make the steering more susceptible to getting pulled to either side when you hit uneven surfaces in the road (potholes, bumps, areas of different traction, etc).

Your track bar and drag link aren't parallel. They're close to parallel, but close just means the bump steer won't be as bad as it could be if they were farther off.

Something else to consider is your tire size and wheel offset choice may have resulted in excessive positive scrub radius. If so, this will tend to make the steering more susceptible to getting pulled to either side when you hit uneven surfaces in the road (potholes, bumps, areas of different traction, etc).

do you think I should remove flip kit and go under the knuckle ? Then both drag and track will be inline with each other ?

 

[DylanM]

It might help get things lined up, might not. Won't know for certain unless you try.

 

[Kyle10]

Lookin at it now I think I’m gunna remove flip and also remove synergy bracket and see how it is.

 

[Zachanadandy]

Removing the flip isn't going to make things better, and the steeper the angle the wise it will be. A flip AND track bar raise move the passenger ends of both up equally. Ask they do is lessen the angle. I don't think they are off as much as you think. The drivers side ends aren't perfectly in line either. Its the angle between the 2 end mounts theater matters, the bends in the brts don't change the actual plane of movement. I'm surprised your getting any bump steer with the flip. The flip was the biggest improvement in steering and bump handling we've made to both JLs and the JT we've owned. None of ours have any bump street. What's the condition of your ball joints?

 

[md2k]

maybe its the angle... but what's your toe? looks like the wheels have a lot of toe out, but could just be the picture.

2nd on the trackbar to drag link, as parallel as you can.

 

[BlueScapegoat]

I'll reiterate what's been said, bump steer is caused by the track bar and drag link not being parallel.

The synergy bracket, according to their website, is specifically designed to work with a drag link flip. So if they engineered the part correctly, there shouldn't be any bump steer. There's really nothing more to it than that. They don't look parallel in the photo but I think that's mostly due to camera angles and the track bar having the bends for clearance.

You haven't changed the pitman arm, have you? And you haven't modified the frame end track bar mount? Is this a modified passenger side factory knuckle or aftermarket?

 

[Kyle10]

I'll reiterate what's been said, bump steer is caused by the track bar and drag link not being parallel.

The synergy bracket, according to their website, is specifically designed to work with a drag link flip. So if they engineered the part correctly, there shouldn't be any bump steer. There's really nothing more to it than that. They don't look parallel in the photo but I think that's mostly due to camera angles and the track bar having the bends for clearance.

You haven't changed the pitman arm, have you? And you haven't modified the frame end track bar mount? Is this a modified passenger side factory knuckle or aftermarket?

Stock pitman arm and stock knuckle and frame side I have synergy sector shaft brace

 

[VA6489]

Anybody see anything standing out that could be an issue with causing bump steer ?

EVO 4.5 upper and lower control arms
Synergy track bar riser bracket
Synergy sector shaft brace
Falcon stabilizer

Track bar and drag link lengths are the issue. they should be within an inch or two in length of each other. Parallel helps but not necessarily required. Length is what you need to be very close on.

 

[Kyle10]

Track bar and drag link lengths are the issue. they should be within an inch or two in length of each other. Parallel helps but not necessarily required. Length is what you need to be very close on.

How’s that even possible ? Center mount to center mount is 34 track and 41 3/4 drag ?

 

[vacaedzzr1200]

I think it's too clean. Go get some dirt on that rig.

 

[VA6489]

How’s that even possible ? Center mount to center mount is 34 track and 41 3/4 drag ?

How is that possible...... Simple. The OEM designed in the issue by not making them as close to the same length as possible. Two ways forward here:
1) Live with the bump steer, try to mitigate it with morte caster 7+ degrees.
2) Redesign the axle and frame end mounts to provide more length.

 

[Kyle10]

How is that possible...... Simple. The OEM designed in the issue by not making them as close to the same length as possible. Two ways forward here:
1) Live with the bump steer, try to mitigate it with morte caster 7+ degrees.
2) Redesign the axle and frame end mounts to provide more length.

Yes was going to adjust caster. Also goin to try PSC hydro assist steering

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