Please help me solve the oscillating vibration crisis by providing some basic info on your Jeep

[freedom_in_4low]

There's so many threads with scattered info it's impossible to tabulate anything, so I'm asking directly for answers to the following questions - please respond EVEN IF YOU DON'T have the oscillating vibration issue. The more data the better, and I can put this in Excel and pivot table the $#!+ out of this.

1. Do you have the oscillating vibration issue and at what speed does it start?
2. does it persist even with the front driveshaft removed?
3. Model year and TJ or LJ
4. Axles and Gear ratio (and if you have a Rubicon, did you keep thick cut gears or did you get a 3.92+ carrier and go to standard gears?)
5. Tire size
6. transmission
7. transfer case, and if 231, is it SYE'd
8. stock or aftermarket transfer case skid, and if aftermarket, which skid (please include brand, tuck height, and material)
9. stock or aftermarket gas tank skid, and if aftermarket, which skid?
10. suspension lift height, if any
11. any other mods that might change the way the frame is constrained, such as a stretch, midarm, rear frame raise, crossmember deletions, spring perch relocations, shock outboard, etc.

 

[tworley]

1. Yes. 67 mph
2. No
3. 1997 TJ
4. Dana 30, Dana 44 (rubi). 5.13
5. 35x12.5R15 MTR
6. AX15
7. 231. JB Super Short SYE
8. Aftermarket skid. Savvy.
9. Aftermarket GTS. Savvy.
10. Outboard. Spring perches relocated.

 

[thekidwithquestions]

1. No
2. No (duh)
3. 1999 TJ
4. Dana 30/Dana 44, 4.56 gear ratio
5. 33x12.50
6. AX-15
7. NP-231 JB conversion SSSYE, TW driveshaft
8. Stock skid
9. Stock gas tank skid but tucked 1 inch
10. None

Boring I know gimme a year or two...

 

[bobthetj03]

There's so many threads with scattered info it's impossible to tabulate anything, so I'm asking directly for answers to the following questions - please respond EVEN IF YOU DON'T have the oscillating vibration issue. The more data the better, and I can put this in Excel and pivot table the $#!+ out of this.

1. Do you have the oscillating vibration issue and at what speed does it start?
2. does it persist even with the front driveshaft removed?
3. Model year and TJ or LJ
4. Axles and Gear ratio
5. Tire size
6. transmission
7. transfer case, and if 231, is it SYE'd
8. stock or aftermarket transfer case skid, and if aftermarket, which skid?
9. stock or aftermarket gas tank skid, and if aftermarket, which skid?
10. any other mods that might change the way the frame is constrained, such as a stretch, midarm, rear frame raise, crossmember deletions, spring perch relocations, shock outboard, etc.

1. Yes, starting at 60 mph.
2. Yes.
3. 2003 TJ Sport
4. LP Dana 30 front, stock. Dana 44 rear, factory disc brakes. Revo shafts, Detroit Trutrac. Regeared to 4.56, twice.
5. 33x10.50x15 KO2's.
6. NV3550 5 speed.
7. NV231, rebuilt and AA SYE installed at time of rebuild.
8. Barnes 1/4" thick steel skid. 1" TT basically.
9. Stock GTS.
10. All stock configuration. MC arms, JKS front TB, RC rear TB, ZJ steering. Adams drive shafts.

 

[DuncLJ]

1. No
2. N/A
3. 2005 LJ
4. LP Dana 30, Dana 44, 5.13
5. 35x12.5x15 KM3's
6. 42RLE
7. 231, AA SYE
8. UCF Extra Clearance skid
9. Savvy GTS
10. Frame is in stock configuration

 

[macleanflood]

1. Do you have the oscillating vibration issue and at what speed does it start? No
2. does it persist even with the front driveshaft removed? Na
3. Model year and TJ or LJ 97
4. Axles and Gear ratio 30/35/3.07
5. Tire size 33 KO2
6. transmission AX-15
7. transfer case, and if 231, is it SYE'd 231, SYE
8. stock or aftermarket transfer case skid, and if aftermarket, which skid? Stock, no spacers
9. stock or aftermarket gas tank skid, and if aftermarket, which skid? Stock
10. any other mods that might change the way the frame is constrained, such as a stretch, midarm, rear frame raise, crossmember deletions, spring perch relocations, shock outboard, etc. Nope

 

[06lj]

1. No
2. N/A
3. 2006 LJ
4. LP Dana 30, Dana 44, 3.73
5. 285/75R16 Duratrac
6. 42RLE
7. 231, RT SYE
8. Barnes skid plate (3/4" rise vs. stock) 1" MML
9. Stock
10. Stock frame

 

[Artsifrtsi]

1. NO
2. N/A
3. 2005 TJ
4. 30/35 3.07
5. 31x10.5x15
6. NSG370
7. 231, no SYE
8. stock transfer case skid
9. stock gas tank skid
10. None

 

[Sj's TJ]

1. No
2. N/A
3. 2000
4. Dana 30/Dana 44, 4.88 gear ratio
5. 35x12.50
6. AX-5
7. Atlas 5.0:1
8. UCF Ultra High Clearance skid, TMR universal trans crossmember
9. Genright EXT Tank 19.5 Gallon
10. None

 

[freedom_in_4low]

wow great response so far, thanks you guys! can't wait to start entering this and hearing the story the data tells...hopefully it tells one.

 

[TheBoogieman]

Never had any vibes on any of my Jeeps. Current info below.

 

[freedom_in_4low]

There's so many threads with scattered info it's impossible to tabulate anything, so I'm asking directly for answers to the following questions - please respond EVEN IF YOU DON'T have the oscillating vibration issue. The more data the better, and I can put this in Excel and pivot table the $#!+ out of this.

1. Do you have the oscillating vibration issue and at what speed does it start?
2. does it persist even with the front driveshaft removed?
3. Model year and TJ or LJ
4. Axles and Gear ratio
5. Tire size
6. transmission
7. transfer case, and if 231, is it SYE'd
8. stock or aftermarket transfer case skid, and if aftermarket, which skid?
9. stock or aftermarket gas tank skid, and if aftermarket, which skid?
10. any other mods that might change the way the frame is constrained, such as a stretch, midarm, rear frame raise, crossmember deletions, spring perch relocations, shock outboard, etc.

Just so I don't forget to enter my own:

1. Yes, 74mph
2. yes
3. 06 LJ
4. HP30/44 4.88
5. 35x12.5
6. NSG370
7. 231 with JB Conv SYE
8. UCF Extra, 1/4" steel
9. stock
10. n/a

 

[Dr. Internet]

1. No
2. N/A
3. Rubicon unlimited 2006
4. Stock Rubicon
5. Stock Rubicon - KO2
6.Stock Rubicon manual
7. Stock Rubicon
8. Stock Rubicon
9. Stock Rubicon
10. Stock Rubicon

 

[srimes]

um... don't you need lift height too? Seems critical here...

 

[freedom_in_4low]

um... don't you need lift height too? Seems critical here...

Oddly enough, from my research to this point lift height and driveline angle seem to not really be major contributors.

 

[freedom_in_4low]

@psrivats hoping not to trigger a PTSD episode for you by bringing you into this, but I have most of your info already figured out except for speed at onset, and what specific skids you're running, and couldn't remember if you have frame mods like a midarm or an outboard. I fiogured I'd enter yours once with 5.38, no vibes and a rubicrawler, and once with 4.88, vibes and no rubicrawler.

 

[freedom_in_4low]

oh, and info for my TJ:

1. No
2. No
3. 99 TJ
4. HP30/44 4.56
5. 32x11.5
6. AX15
7. 231 with JB Conv SYE
8. stock
9. stock
10. n/a

and my first LJ
1. No
2. No
3. 05 LJ
4. LP30/44 3.73
5. 33x10.5
6. NSG370
7. 231
8. stock
9. stock
10. n/a

 

[Apparition]

1. No
2. N/A
3. 2006 LJ
4. Currie HP44 and 60 5.13's
5. 35's
6. 42RLE
7. 231 SSSYE from Teraflex
8. Savvy
9. Savvy
10. No but I also have a Rubicrawler in the driveline.

 

[oldjeepman]

1. No
2. N/A
3. 2006 lj
4. Dana 44- 4.88
5. 315/70/17
6. 6spd
7. 241
8. Aftermarket Nth Degree
9. Aftermarket Genright Tank
10. None..

 

[DaveC]

1. No
2. NA
3. 2006 TJ
4. Dana 30/35, 3.73
5. 31/10.5/15
6. 42RLE
7. 231 w/SYE
8. LetzRoll Offroad 1/4" steel belly-up skid, 1"MML, 1"BL
9. Stock GTS
10. 2.5" SL + 1" BL
11. None

Edit: realized I skipped #10 initially.