Wheel spacer questions

[KurtP]

Before changing the bump stop spacer you will want to verify that you won't be over compressing the shock if you hit the bump stops, or over extending it with flexion on the opposite side. No spacer will indeed increase travel, but it may be too much for your extremely expensive shocks.

correct. I'll have to disconnect the spring and look at where the shock is fully collapsed relative to the hydro bump stop travel before making any change.

The things we do in search of the final 1/10th.......the last 1/10th always takes 10 times more work than the first 9/10ths, it seems.

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[j.o.y.ride]

correct. I'll have to disconnect the spring and look at where the shock is fully collapsed relative to the hydro bump stop travel before making any change.

You will need to find out how much travel the shock has in it and then calculate the compression for the new amount of down travel, but also the extension in fully flexed. I bet your extension is more likely to be an issue but you need to check both.

And then also be sure there is enough length in the brake lines. The JT are pretty good up front but last thing you want is a torn line because you over extended them.

Another thread on the topic of Mojave shock stats said you need to contact Jeep for that information.

 

[KurtP]

You will need to find out how much travel the shock has in it and then calculate the compression for the new amount of down travel, but also the extension in fully flexed. I bet your extension is more likely to be an issue but you need to check both.

And then also be sure there is enough length in the brake lines. The JT are pretty good up front but last thing you want is a torn line because you over extended them.

The extension length isn't an issue. The only issue would be making sure the uptravel of the shock, the up travel of the hydro bump stop, and the bump stop spacer size are al correct. The question will be did fabtec use the 3" bump stop spacer because of upstroke to the shock/hydro bump stop? or just to clear the track bar on their tower bracket at full compression to prevent frame contact, and I dont know the answer to that yet.

I already checked the brake lines at full axle extension all the way to spring disconnect. I almost wonder if the Mojave got longer brake lines than others, because the lines never got tight as long as the control arms were connected, even without the spring (front and rear)....so down travel tension on the lines isn't an issue at present.

 

[KurtP]

Another thread on the topic of Mojave shock stats said you need to contact Jeep for that information.

Neither jeep nor fox nor fabtec were willing to share any shock data they found. I had one company that was interested in seeing all the shock dyno data, but wasn't willing to help me pay the $1,600 for the shop to get the data on the shocks, so i skipped it.

I'll just have to check the compression and extension of the shocks with the springs out and run them full compressed each side individually, again with the other side at full extension, and then fully compressed together and see where everything measures out. It isn't hard, it's just a lot of work and time.

 

[KurtP]

The spring lift itself was about 2-2.25". The shock extensions and bump stops are 3". I speculate this was done so that they could flip the drag link and relocate the track bar upward and avoid frame contact; and they traded an inch of uptravel for an inch of down travel. It's not a terrible compromise from an articulation standpoint, especially since they intended it to be with a raised track bar anyway. had they not swapped an inch of up for down travel, you'd just lose the inch of up travel on account of track bar frame contact. The one thing Fox did tell me is that the shocks can be off center and still function as designed, but not to go much past 1".

What I dont know is if that 3" bump stop is JUST for track bar/frame contact, or if its ALSO for compression limit of the shock and bump stop.

 

[j.o.y.ride]

An expensive thing to be the guinea pig on if you ruin the front shock(s).

 

[KurtP]

An expensive thing to be the guinea pig on if you ruin the front shock(s).

I wont.

 

[Renegade]

The spring lift itself was about 2-2.25". The shock extensions and bump stops are 3". I speculate this was done so that they could flip the drag link and relocate the track bar upward and avoid frame contact; and they traded an inch of uptravel for an inch of down travel. It's not a terrible compromise from an articulation standpoint, especially since they intended it to be with a raised track bar anyway. had they not swapped an inch of up for down travel, you'd just lose the inch of up travel on account of track bar frame contact. The one thing Fox did tell me is that the shocks can be off center and still function as designed, but not to go much past 1".

What I dont know is if that 3" bump stop is JUST for track bar/frame contact, or if its ALSO for compression limit of the shock and bump stop.

Find someone with a forklift for testing the upper and lower limits of shock/suspension travel. Adjust as necessary.

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