Gears & Axles Driveshafts | Rearends | Differentials | Gears | 12 Bolt | 9 Inch | Dana

Rearend Wobble?

Thread Tools
 
Search this Thread
 
Old Jun 25, 2013 | 02:50 PM
  #1  
bouttime's Avatar
Thread Starter
Staging Lane
 
Joined: Jun 2010
Posts: 53
Likes: 0
Default Rearend Wobble?

Dyno yesterday we noticed the rear looked to be wobbling. By "wobbling" I mean tire rotating unevenly on both sides. I just had lots of new parts installed including: 9inch shortened 3 inches each side, new driveshaft, torque arm, lca's, panhard, new rotors and pads from brake motive, custom boze wheels, qa1 coilovers front and rear. Does anyone know of any particular part that would cause this problem, other than the obvious reason of re-torquing the wheels back on the car to make sure they are flush? I pick the car up tomorrow so any feedback is appreciated thanks
Reply
Old Jun 25, 2013 | 09:23 PM
  #2  
S10xGN's Avatar
TECH Junkie
iTrader: (11)
 
Joined: Jul 2005
Posts: 3,782
Likes: 7
From: Port Neches, TX
Default

Maybe the lug stud holes/center hubs were machined off-center? Should be easy to track down, whatever it is...
Reply
Old Jun 26, 2013 | 08:10 AM
  #3  
Bob@BruteSpeed's Avatar
LS1Tech Sponsor
20 Year Member
Active Streak: 30 Days
Active Streak: 60 Days
Liked
iTrader: (16)
 
Joined: Mar 2003
Posts: 21,020
Likes: 35
From: Roanoke, IN
Default

Jack up the car and remove the wheels. At idle and in gear see if you may have a bent axle, if not it has to be in a wheel. Bob
__________________
ATI ProCharger and Moser Sales 260 672-2076

PM's disabled, please e-mail me
E-mail: brutespeed@gmail.comob@brutespeed.com

https://brutespeed.com/ Link to website


Reply
Old Jun 26, 2013 | 08:40 AM
  #4  
SSellers's Avatar
Launching!
 
Joined: Jun 2005
Posts: 277
Likes: 0
From: SC
Default

I've had new axles that would not allow the brake disc to seat correctly without either machining the axle or grinding out the rotor. As already mentioned, other possibilities are bent axle (been there) or problem with the wheels since they're custom. Correct lug spacing between new axles and wheels? Not a mix/match of 5x4.75" and 5x120mm?
Reply
Old Jun 27, 2013 | 10:43 AM
  #5  
bouttime's Avatar
Thread Starter
Staging Lane
 
Joined: Jun 2010
Posts: 53
Likes: 0
Default

Originally Posted by SSellers
Correct lug spacing between new axles and wheels? Not a mix/match of 5x4.75" and 5x120mm?
How would I check this?

Also my HP numbers on the Dyno seem way low 350, should be more around 400, could the rear end wobble be causing the low dyno #'s

Last edited by bouttime; Jun 27, 2013 at 10:49 AM.
Reply
Old Jun 27, 2013 | 11:05 AM
  #6  
SSellers's Avatar
Launching!
 
Joined: Jun 2005
Posts: 277
Likes: 0
From: SC
Default

Originally Posted by bouttime
How would I check this?

Also my HP numbers on the Dyno seem way low 350, should be more around 400, could the rear end wobble be causing the low dyno #'s
Using a micrometer. It's hard to get since the two are so close, only 0.7mm difference. It would be best if you knew how your custom wheels and axles were ordered.

One other thing, if the new axles don't have a hub lip sticking out to locate the wheels hubcentrically (most aftermarket ones don't, and most aftermarket wheels are not set up for it anyway) then you have to rely on properly installing the lugnuts to center the wheel using conical seat lug nuts. If you tighten down the first lug nut with an impact before getting all of them seated right or don't tighten in a crisscross pattern it is possible to have the wheel shifted slightly.
Reply




All times are GMT -5. The time now is 04:52 PM.

story-0
Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?

Slideshow: We take a close look at the ONE and Artidiag 800BT2 diagnostic tools from Topdon and the reasons to buy one over the other.

By Pouria Savadkouei | 2026-05-28 11:05:11


VIEW MORE
story-1
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine

Slideshow: The controversial Ferrari F6 swaps its original flat-12 for a Corvette Z06-derived LT4 V8 and sends power to four rear wheels through a custom-built drivetrain.

By Verdad Gallardo | 2026-05-26 18:23:54


VIEW MORE
story-2
7 Most Reliable High-Performance Engines GM Has Ever Built

Slideshow:These GM engines didn't just make huge power, they survived abuse, boost, track days, and six-digit mileage with a reputation for refusing to quit.

By Verdad Gallardo | 2026-05-21 16:45:27


VIEW MORE
story-3
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Slideshow: This heavily modified 1971 Camaro mixes classic muscle car styling with a fifth-generation Camaro interior and modern LS3 power.

By Verdad Gallardo | 2026-05-12 18:06:42


VIEW MORE
story-4
6 Common C5 Corvette Failures and What's Involved In Repairing Them

Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.

By Pouria Savadkouei | 2026-05-07 18:44:57


VIEW MORE
story-5
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.

By Verdad Gallardo | 2026-04-21 13:57:02


VIEW MORE
story-6
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...

By Pouria Savadkouei | 2026-04-16 10:05:15


VIEW MORE
story-7
Top 10 Most Powerful Chevy Trucks Ever Made!

Slideshow: Top ten most powerful Chevy trucks ever made

By | 2026-03-25 09:22:26


VIEW MORE
story-8
Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Slideshow: Hennessey has turned the Silverado ZR2 into a 700-hp off-road monster with supercharged V8 power and a limited production run.

By Verdad Gallardo | 2026-03-24 18:57:52


VIEW MORE
story-9
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.

By Verdad Gallardo | 2026-03-23 18:53:41


VIEW MORE