Finding Vibration Source - Page 2 - 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 > YJ Wrangler Technical Forum > Finding Vibration Source

December Specials at Jeephut.comROCK BOTTOM prices on LIFT KITS at Rockridge4wd!! WANT TO Alloy usa heavy duty ball joint kits

Reply
Unread 06-28-2013, 03:53 PM   #16
laybackman
Bikini Bridge Inspector
 
laybackman's Avatar
1995 YJ Wrangler 
 
Join Date: Dec 2002
Location: Massachusetts
Posts: 6,282
Quote:
Originally Posted by idaholtby View Post
Well, your pinion angle is definitely too low. I would suggest installing shims that most kits come with and or the least favorite option.... a t-case lowering kit. The ideal option would be a SYE with a CV rear shaft, but with your size lift, this really should not be necessary. If you are thinking of going to a larger lift soon, then this would be the option to pursue. I'm thinking though that rear axle shims will get you what you need.
If you look at the picture you posted of your driveline it doesn't look right. Either the tail end of the TC has to come down or the rear end has to come up. Their angles must be complimentary.

http://jniolon.clubfte.com/driveline...nephasing.html

__________________
"Taking care of our veterans is a cost of war. If you can spend six trillion dollars sending people to war, you can spend a few billion dollars taking care of them when they come home"
Sen. Bernie Sanders (I-Vt.)

If what doesn't kill you, makes you stronger, I should be able to bench press a Grand Cherokee by now!
laybackman is offline   Reply With Quote Quick reply to this message
Unread 06-28-2013, 09:32 PM   #17
TA-YJ
Registered User
1992 YJ Wrangler 
 
Join Date: Dec 2007
Location: Pennsylvania
Posts: 539
I do realize that the pinion angle is a bit extreme. Im still wondering why it started making the vibes with 1" rubber mounts as opposed to the BD ones.
__________________
1992 YJ 2.5L
Engine Mods:4.0L TB, Ford Design III 19lb Injectors, Firepower Ignition System, Ford TBird Electric Fan, Pacesetter Header, Magnaflow Cat, Dynomax Super Turbo Exhaust
Suspension Mods:BDS 2" Lift, M.O.R.E. 5/8" HD Shackles, 1" Brown Dog MML
Other:LED Tails and Herculined
TA-YJ is offline   Reply With Quote Quick reply to this message
Unread 06-29-2013, 07:25 AM   #18
laybackman
Bikini Bridge Inspector
 
laybackman's Avatar
1995 YJ Wrangler 
 
Join Date: Dec 2002
Location: Massachusetts
Posts: 6,282
Quote:
Originally Posted by TA-YJ View Post
I do realize that the pinion angle is a bit extreme. Im still wondering why it started making the vibes with 1" rubber mounts as opposed to the BD ones.
Find out by swapping in the BD mounts!
__________________
"Taking care of our veterans is a cost of war. If you can spend six trillion dollars sending people to war, you can spend a few billion dollars taking care of them when they come home"
Sen. Bernie Sanders (I-Vt.)

If what doesn't kill you, makes you stronger, I should be able to bench press a Grand Cherokee by now!
laybackman is offline   Reply With Quote Quick reply to this message
Unread 06-29-2013, 02:44 PM   #19
TA-YJ
Registered User
1992 YJ Wrangler 
 
Join Date: Dec 2007
Location: Pennsylvania
Posts: 539
They were in with the new engine but the idle vibes were aggravating me so I swapped them for the lift plates. There wasn't anything close to the in gear vibes I'm getting now
__________________
1992 YJ 2.5L
Engine Mods:4.0L TB, Ford Design III 19lb Injectors, Firepower Ignition System, Ford TBird Electric Fan, Pacesetter Header, Magnaflow Cat, Dynomax Super Turbo Exhaust
Suspension Mods:BDS 2" Lift, M.O.R.E. 5/8" HD Shackles, 1" Brown Dog MML
Other:LED Tails and Herculined
TA-YJ is offline   Reply With Quote Quick reply to this message
Unread 06-29-2013, 04:20 PM   #20
laybackman
Bikini Bridge Inspector
 
laybackman's Avatar
1995 YJ Wrangler 
 
Join Date: Dec 2002
Location: Massachusetts
Posts: 6,282
Quote:
Originally Posted by TA-YJ View Post
They were in with the new engine but the idle vibes were aggravating me so I swapped them for the lift plates. There wasn't anything close to the in gear vibes I'm getting now
Did your driveshaft have any of those small counterweights on them that got knocked off. And if you removed the driveshaft and installed it in a different position that could be the problem.

Get this rig up on four jack stands and run it. See what you can see.
__________________
"Taking care of our veterans is a cost of war. If you can spend six trillion dollars sending people to war, you can spend a few billion dollars taking care of them when they come home"
Sen. Bernie Sanders (I-Vt.)

If what doesn't kill you, makes you stronger, I should be able to bench press a Grand Cherokee by now!
laybackman is offline   Reply With Quote Quick reply to this message
Unread 06-29-2013, 06:15 PM   #21
TA-YJ
Registered User
1992 YJ Wrangler 
 
Join Date: Dec 2007
Location: Pennsylvania
Posts: 539
It does have a counter weight I believe, but I think its still on there. Ill check. I sprayed the Ujoints and the pinion on the axle so I knew both front and rear drive shafts went in with the same orientation. Im going to try the Tcase drop tomorrow to fix the drive line angle and see how that does.
__________________
1992 YJ 2.5L
Engine Mods:4.0L TB, Ford Design III 19lb Injectors, Firepower Ignition System, Ford TBird Electric Fan, Pacesetter Header, Magnaflow Cat, Dynomax Super Turbo Exhaust
Suspension Mods:BDS 2" Lift, M.O.R.E. 5/8" HD Shackles, 1" Brown Dog MML
Other:LED Tails and Herculined
TA-YJ is offline   Reply With Quote Quick reply to this message
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the JeepForum.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.
Note: All free e-mails have been banned due to mis-use. (Yahoo, Gmail, Hotmail, etc.)
Don't have a non-free e-mail address? Click here for a solution: Manual Account Creation
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.


Thread Tools






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.