Pulsing Vibration after Regear - Page 6 - JeepForum.com
Search  
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back JeepForum.com > Models > Jeep Wrangler Forums > TJ Wrangler Technical Forum > Pulsing Vibration after Regear

SPARTAN LOCKERS are on sale BIG TIME at ROCKRIDGE 4WD!ROCKRIDGE4WD Introduces a NEW Jeep Wrangler JK *led* tail ANOTHER Rockridge4wd Creation!! Spare Tire Carrier Delete

Reply
Unread 12-20-2010, 06:14 PM   #76
mrblaine
Wizard of Brakes
 
mrblaine's Avatar
1999 TJ Wrangler 
 
Join Date: Dec 2004
Location: Quail Valley, California
Posts: 25,593
Quote:
Originally Posted by Unlimited04 View Post
I was trying to fix the vibes by adjusting the pinion angle, as you suggested earlier in the thread. I tried everything between 1 up to 3 down, in ~0.5 increments, and didn't change anything one bit. It's just currently at 2 because that was the last degree I tested.
Any driveshaft in the rear that I've run at that angle will induce vibes.

__________________
I am Savvy
blackmagicbrakes.com
mrblaine is offline   Reply With Quote
Unread 12-20-2010, 06:27 PM   #77
Unlimited04
This post/info=my opinion
 
Unlimited04's Avatar
2004 LJ Wrangler 
 
Join Date: Dec 2005
Location: Colorado
Posts: 23,234
Quote:
Originally Posted by mrblaine View Post
Any driveshaft in the rear that I've run at that angle will induce vibes.
what about when the vibes are the same at 2 as they are at 0 straight?
Unlimited04 is offline   Reply With Quote
Unread 12-20-2010, 06:45 PM   #78
mrblaine
Wizard of Brakes
 
mrblaine's Avatar
1999 TJ Wrangler 
 
Join Date: Dec 2004
Location: Quail Valley, California
Posts: 25,593
Quote:
Originally Posted by Unlimited04 View Post
what about when the vibes are the same at 2 as they are at 0 straight?
Here's what I know about fixing difficult issues. Make everything you do be as good as it can be. Change one thing at a time.

I don't know about vibes not changing at various angles, but I do know I've never been able to get rid of them at 2 down and I can almost always create them with that much misalignment.
__________________
I am Savvy
blackmagicbrakes.com
mrblaine is offline   Reply With Quote
Unread 12-20-2010, 06:50 PM   #79
mrblaine
Wizard of Brakes
 
mrblaine's Avatar
1999 TJ Wrangler 
 
Join Date: Dec 2004
Location: Quail Valley, California
Posts: 25,593
Oh, go read post #8 again. where's that darn flip-off guy when you need him?
__________________
I am Savvy
blackmagicbrakes.com
mrblaine is offline   Reply With Quote
Unread 12-20-2010, 07:04 PM   #80
Unlimited04
This post/info=my opinion
 
Unlimited04's Avatar
2004 LJ Wrangler 
 
Join Date: Dec 2005
Location: Colorado
Posts: 23,234
Quote:
Originally Posted by mrblaine View Post
Oh, go read post #8 again. where's that darn flip-off guy when you need him?
the flip-off guy is hanging out in Post #13

Quote:
Originally Posted by Unlimited04 View Post
rear is dialed in dead on, no 1 deg down BS.
I'll set it back to 0 and try again with the new shaft.
Unlimited04 is offline   Reply With Quote
Unread 12-20-2010, 07:13 PM   #81
mrblaine
Wizard of Brakes
 
mrblaine's Avatar
1999 TJ Wrangler 
 
Join Date: Dec 2004
Location: Quail Valley, California
Posts: 25,593
Quote:
Originally Posted by Unlimited04 View Post
the flip-off guy is hanging out in Post #13



I'll set it back to 0 and try again with the new shaft.
I truly know Sean is a great guy. That said, driveshafts are just driveshafts and even in all of his awesomeness, I humbly offer that Sean is unable to impart any mystical stayinbalance powers to a driveshaft.
__________________
I am Savvy
blackmagicbrakes.com
mrblaine is offline   Reply With Quote
Unread 12-20-2010, 08:05 PM   #82
Stang5lgt
Registered User
2002 TJ Wrangler 
 
Join Date: Sep 2005
Location: Parker, CO
Posts: 517
Two other factors to throw in here. Sean ran 35s 37s. Unlimited is running 33s. Which means more RPMs. Other thing that is new besides the 33s. Is the true track. Next if it was the gears or true track wouldn't the vibes still happen with driveshaft removed. Unlimited said they go away. Unlimited I have spare Advanced Adapter SYE yoke you can borrow if you wanna try changing to a different one.
__________________
For Off Road Deployment
Stang5lgt is offline   Reply With Quote
Unread 12-20-2010, 08:36 PM   #83
Hendrix
TJOTY 2013
 
Hendrix's Avatar
1997 TJ Wrangler 
 
Join Date: Apr 2009
Location: Nashville
Posts: 4,629
Great advice. I am trying to track down the very same vibe. I have a 2004 Unlimited with a fresh 4.88 regear and 33s with the 42rle. I have the same vibe at any speed above 40. I removed the front shaft and the vibe goes away. The vibe is the very same shaking of the rear view mirror Unlimited04 has.

Unfortunatly I have not found a shop to High speed balance the factory shaft in my area.
Hendrix is offline   Reply With Quote
Unread 12-20-2010, 08:36 PM   #84
Unlimited04
This post/info=my opinion
 
Unlimited04's Avatar
2004 LJ Wrangler 
 
Join Date: Dec 2005
Location: Colorado
Posts: 23,234
Quote:
Originally Posted by mrblaine View Post
I truly know Sean is a great guy. That said, driveshafts are just driveshafts and even in all of his awesomeness, I humbly offer that Sean is unable to impart any mystical stayinbalance powers to a driveshaft.
LOL. That made me laugh out loud. Well stated

Ok, so I reset to 0. Got it up to 70mph. No appreciable change. Still at ~50% of original vibes, with same behavior.

Thanks for the help Blaine, Josh, Dave & others. I give up for now...I'm going home for the holidays and will address this again in 2011.
Unlimited04 is offline   Reply With Quote
Unread 12-20-2010, 08:49 PM   #85
Stang5lgt
Registered User
2002 TJ Wrangler 
 
Join Date: Sep 2005
Location: Parker, CO
Posts: 517
Have a great Christmas and Happy New Year!
__________________
For Off Road Deployment
Stang5lgt is offline   Reply With Quote
Unread 12-20-2010, 09:02 PM   #86
mudb8
want it rite or rite now?
 
mudb8's Avatar
1999 TJ Wrangler 
 
Join Date: Sep 2008
Location: Estacada, oregon
Posts: 5,624
Quote:
Originally Posted by Stang5lgt View Post
It wasn't over spec. I hate to have you gear my axle 19 in. lbs is max on new bearings and 9 in. lbs. on old bearings for the Dana 44. If you are torquing them up to 25 in. lbs. well then you are putting some extra stress on the bearings.
That was EXACTLY my point.... Have you ever seen what the FSM says to set them at? It can turn into a big argument from inexperienced people and parts changers.
__________________
I want your factory 07-up take-off/thrown out JK front/rear Lower Control Arms! Bent ones are perfect also as long as the bushings and cold cut rings are in good shape/useable


HighLine Hood Jeepers
TJ Adjustable Track bars
DIY highline fenders.... 34-37's under 0"-2.5" lifts
shock length, bumpstop extension, tire size chart click here
DIY shock shifters, more uptravel/better ride




2011 E-350 4x4 Van conversion

2006 Rubicon Unlimited

ASE Certified Master Tech/Fabricator @ jeepwest.com
mudb8 is offline   Reply With Quote
Unread 12-20-2010, 09:11 PM   #87
mudb8
want it rite or rite now?
 
mudb8's Avatar
1999 TJ Wrangler 
 
Join Date: Sep 2008
Location: Estacada, oregon
Posts: 5,624
Quote:
Originally Posted by Unlimited04 View Post
the flip-off guy is hanging out in Post #13



I'll set it back to 0 and try again with the new shaft.
can you move the rear t-case output yoke/shaft in or out?
__________________
I want your factory 07-up take-off/thrown out JK front/rear Lower Control Arms! Bent ones are perfect also as long as the bushings and cold cut rings are in good shape/useable


HighLine Hood Jeepers
TJ Adjustable Track bars
DIY highline fenders.... 34-37's under 0"-2.5" lifts
shock length, bumpstop extension, tire size chart click here
DIY shock shifters, more uptravel/better ride




2011 E-350 4x4 Van conversion

2006 Rubicon Unlimited

ASE Certified Master Tech/Fabricator @ jeepwest.com
mudb8 is offline   Reply With Quote
Unread 12-20-2010, 09:20 PM   #88
mudb8
want it rite or rite now?
 
mudb8's Avatar
1999 TJ Wrangler 
 
Join Date: Sep 2008
Location: Estacada, oregon
Posts: 5,624
Quote:
Originally Posted by Hendrix View Post
Great advice. I am trying to track down the very same vibe. I have a 2004 Unlimited with a fresh 4.88 regear and 33s with the 42rle. I have the same vibe at any speed above 40. I removed the front shaft and the vibe goes away. The vibe is the very same shaking of the rear view mirror Unlimited04 has.

Unfortunatly I have not found a shop to High speed balance the factory shaft in my area.
I just yanked a set of rubi carriers from an 06 LJ with 4.88's and installed ARB's and 5.38's running 33's & a 42RLE which had vibs around 65, the front shaft was rebalanced and the rear is a custom built unit by driveline tech, local here, no more vibs.
__________________
I want your factory 07-up take-off/thrown out JK front/rear Lower Control Arms! Bent ones are perfect also as long as the bushings and cold cut rings are in good shape/useable


HighLine Hood Jeepers
TJ Adjustable Track bars
DIY highline fenders.... 34-37's under 0"-2.5" lifts
shock length, bumpstop extension, tire size chart click here
DIY shock shifters, more uptravel/better ride




2011 E-350 4x4 Van conversion

2006 Rubicon Unlimited

ASE Certified Master Tech/Fabricator @ jeepwest.com
mudb8 is offline   Reply With Quote
Unread 12-20-2010, 09:31 PM   #89
Wheelin98TJ
JEEP FREAK
 
Wheelin98TJ's Avatar
1998 TJ Wrangler 
 
Join Date: Apr 2004
Location: , Southeast MI
Posts: 24,166
Quote:
Originally Posted by Hendrix View Post
...Unfortunatly I have not found a shop to High speed balance the factory shaft in my area.
Where are you located?

Maybe there is a Fleet Pride in your area

Find a FleetPride Location
Wheelin98TJ is online now   Reply With Quote
Unread 12-21-2010, 03:57 AM   #90
Unlimited04
This post/info=my opinion
 
Unlimited04's Avatar
2004 LJ Wrangler 
 
Join Date: Dec 2005
Location: Colorado
Posts: 23,234
Quote:
Originally Posted by mudb8 View Post
can you move the rear t-case output yoke/shaft in or out?
no play, solid as a rock. was one of the first things I checked, found the torque on the nut to be around 50 ft-lbs (but wasn't loose). Retorqued to AA's install spec with a good torque wrench.
Unlimited04 is offline   Reply With Quote
Reply

Tags
pulsing , vibration , regear
Thread Tools


Suggested Threads





Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.