JBA 4inch lift issues - Jeep Commander Forums: Jeep Commander Forum
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post #1 of 24 (permalink) Old 11-26-2018, 01:43 PM Thread Starter
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JBA 4inch lift issues

Anyone else have issues with the JBA 4inch lift? It's the Bilstein/springs kit for $1250. It is putting my CV axles at bad angles...replaced bad differential bushings and still not fixed. Went to install a Jeeperf differential drop and got it installed but it put the entire suspension up front in a bind, no suspension slack and the cv axles were literally pushing on the LCA where the shock mount bolt goes.

We are ordering a Superlift crossmember to lower the LCAs hoping the LCA were what were binding the entire lift...but just looking for input on direction to go here? I haven't been able to find anyone else with this issue..
Thanks All!
Thanks all!
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post #2 of 24 (permalink) Old 11-28-2018, 12:31 AM Thread Starter
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Here are pictures of how it stands.
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post #3 of 24 (permalink) Old 11-28-2018, 06:37 AM
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Originally Posted by Hawkeyes View Post
Anyone else have issues with the JBA 4inch lift? It's the Bilstein/springs kit for $1250. It is putting my CV axles at bad angles...replaced bad differential bushings and still not fixed. Went to install a Jeeperf differential drop and got it installed but it put the entire suspension up front in a bind, no suspension slack and the cv axles were literally pushing on the LCA where the shock mount bolt goes.

We are ordering a Superlift crossmember to lower the LCAs hoping the LCA were what were binding the entire lift...but just looking for input on direction to go here? I haven't been able to find anyone else with this issue..
Thanks All.
Thanks all!
I can't recall hearing about anybody on the forum running this lift, so, I wouldn't expect a lot of responses.


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post #4 of 24 (permalink) Old 11-28-2018, 08:16 AM Thread Starter
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Thanks Big Blue. Was definitely hoping for some insight 😞 will continue my evaluations and trial and errors 🙂
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post #5 of 24 (permalink) Old 11-28-2018, 11:38 PM
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That kit looks like a disaster for your angles; the stock suspension simply isn't designed for 4" of lift. Depending on the weight up front it could work with the Bilsteins at their lowest settings, but ultimately you'll be putting everything at far too high of angle.


Dropping the differential and LCAs will help resolve most of your suspension issues. You'll still have a bit of an angle on your UCAs, but nothing the JBAs can't handle. You're going to go through steering racks much more quickly though; there's no way to fix those angles without going for a full Jeeperf steering kit. The only way a Superlift gets away with it is with a redesigned spindle. If you can get hold of those along with the LCA brackets, you shouldn't have any more problems.

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post #6 of 24 (permalink) Old 11-28-2018, 11:56 PM Thread Starter
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So theoretically with the JEEPERF differential drop I just got and a Superlift crossmember and and some 4inch lift tie rod ends I should be ok?
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post #7 of 24 (permalink) Old 11-29-2018, 12:16 AM Thread Starter
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What would be the proper way to fix this I guess is the question. I've already stopped $1300 on the JBA 4in lift, $430 on the JEEPERF bushing and drops, and will be $220 for a Superlift crossmember. Do I just move forward and get the JEEPERF tierod ends and sway bar links or do I scrap this all and start over with a new lift?
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post #8 of 24 (permalink) Old 11-29-2018, 02:21 AM
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Originally Posted by Hawkeyes View Post
What would be the proper way to fix this I guess is the question. I've already stopped $1300 on the JBA 4in lift, $430 on the JEEPERF bushing and drops, and will be $220 for a Superlift crossmember. Do I just move forward and get the JEEPERF tierod ends and sway bar links or do I scrap this all and start over with a new lift?
I don't think you need to scrap it and start over. Longer sway bar end links are a good idea, though I'd personally choose JBA end links. Jeeperf tie rod ends or Superlift spindles should fix your steering angles. Those should sort out your front end.

Your rear end is a little different. You can probably get away with leaving it alone, but you'll probably want to notch your gas tank skid plate so your driver's side UCA has room to drop during normal axle travel. Another option is Superlift control arms. You can also probably use an adjustable track bar since your axle will be an inch or so off center. Again, you probably don't need either of these things for daily driving, they're just modifications to consider.

However, you're definitely in undocumented territory. A few of us have gone to 4" of lift, and we've all run into different problems with it. The issues you're facing are going to be different than what I saw with mine, and you may run into issues I didn't, or you may avoid issues I had.

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post #9 of 24 (permalink) Old 11-29-2018, 02:47 AM
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Curious as to what the part number is on the Superlift crossmember.
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post #10 of 24 (permalink) Old 11-29-2018, 03:00 PM Thread Starter
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Thanks guys...I guess my plan of action is to buy the JEEPERF tie rod ends, the JBA swaybar links and the Superlift crossmember. My dad wants me to get the knuckles from Superlift too but I think that will make a headache with the steering ends because then I would need their spindles etc. Thanks all. Let me know if any other ideas pop up. I reached out to JBA And he has no idea where to go with it from here.
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