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Discussion Starter · #1 ·
After looking at Elka & Fox reservoir shocks I decided to be more practical and got some Bilstein 5100s to replace the Teraflex 9550s I've had on the rig for the last two years. I had a 5125 / 5150 f&r setup on my last rig and really liked them on & off the trail. At $300 for the set from eShocks, hey, can't go wrong. The improvement in ride quality and trail performance is very significant.

Ok, BUT, something else. At the same time I replaced the 9550s I also installed Poly's front shock mounts, which move the lower attachment point over about 2" and prevent the shock body from rubbing the frame. I'd had that issue with the Teras and decided to try the Poly mounts, figuring the Billys wouldn't be as forgiving if they started rubbing the frame. An interesting side benefit has popped up. The JK used to "tram line" a bit, tending to want to follow the normal small ruts worn in pavement. Mildly annoying and I attributed it to the width of the BFG KM2s. Somehow the addition of the Billys & Poly shock mounts has completely eliminated this tendency. Wonder if anyone else has noticed this, and if it's the shocks, the mounts or the combination that's done the trick.
 

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I am interested in the actual part numbers of the Billy's and of the Poly mounts.

I am a huge fan of the Bilstein Shocks.

TIA
 

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Discussion Starter · #7 ·

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Discussion Starter · #8 · (Edited)
I am interested in the actual part numbers of the Billy's and of the Poly mounts.

I am a huge fan of the Bilstein Shocks.

TIA
Yeah, me too. I've used them fro everything from VW street rods to rock rigs. Can't beat 'em.

Scroll down to the bottom of the page. The Bilsteins I got are the ones for short arm 3.5 - 5" lift front, 4" lift rear. They have another set for long arm lifts. Bilstein has changed their part numbering system, so these are the same shocks as the old 5100 part numbers for JKs.

http://eshocks.com/bil_veh.asp?Model_Index=1Q79&Manf=All&SubChar=Q

Note that eShocks has a bad listing, they refer to the JK as the "Cherokee JK". ("Doh.......") These guys are great vendors, BTW. Great prices and free shipping, too.

FWIW, I cut the boots off. No boots needed, just collect dirt, salt, etc.
 

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Discussion Starter · #9 ·
I run 12.5"x37" BFG's and Bilstein 5100's with the oem mounts, no "tram lining."
Thanks. Do you get any frame rub on the tubes?
 

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Discussion Starter · #11 ·
No frame rub. 4.5" AEV lift.
Ah, ha. AEV's 4.5 has the same type of shock mount up front. The upper inside edge of the cans on the TF shocks I had on there before were contacting the frame on their top inside edges. The Poly (and AEV) brackets essentially flip the lower shock mount to the outside of the stock shock mount and add reinforcement. Keeps the shock from contacting the frame under compression.

I suppose if you were a welder you could just cut off the stock shock mounts and weld on some new ones spaced a bit further out.
 
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