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

Clunk when accel and decel! Any ideas?

Thread Tools
 
Search this Thread
 
Old Oct 3, 2007 | 03:17 PM
  #1  
nahasapeemapetalon's Avatar
Thread Starter
12 Second Club
iTrader: (9)
 
Joined: Jun 2006
Posts: 1,051
Likes: 1
From: Grand Forks, North Dakota
Default Clunk when accel and decel! Any ideas?

Ever since i got the 9" in there is slack so when i press the pedal you can feel it clunk and as soon as you let off it clunks. Its not a loud noise but you can feel it. My buddy thought it was the rearend moving or twisting back and forth. Maybe the lca's arent adjusted correctly?
Any other ideas? At first i thought it was something to do with the locker but its gotta be something else.

Thanks
Reply
Old Oct 3, 2007 | 10:45 PM
  #2  
chicane's Avatar
TECH Fanatic
 
Joined: Sep 2004
Posts: 1,124
Likes: 1
From: Las Vegas
Default

It is your locker... and it's typical of 'Dovetail' mechanisms. Dont worry about it, it's normal.
Reply
Old Oct 4, 2007 | 08:12 AM
  #3  
nahasapeemapetalon's Avatar
Thread Starter
12 Second Club
iTrader: (9)
 
Joined: Jun 2006
Posts: 1,051
Likes: 1
From: Grand Forks, North Dakota
Default

Ok, its normal to see your shiter move back and forth some at the same time too? How is this good on them from a dead stop to a 3000rpm+ launch if there is slack?
Reply
Old Oct 4, 2007 | 03:51 PM
  #4  
hazard2k's Avatar
Launching!
iTrader: (10)
 
Joined: Jun 2005
Posts: 244
Likes: 0
From: Rochester, NY
Default

Sounds like it could be a bad tranny mount or even torque arm mount. Check both of those first...
-Jeff
Reply
Old Oct 5, 2007 | 08:07 AM
  #5  
nahasapeemapetalon's Avatar
Thread Starter
12 Second Club
iTrader: (9)
 
Joined: Jun 2006
Posts: 1,051
Likes: 1
From: Grand Forks, North Dakota
Default

Ok, torque arm mount looks shot, tranny mount prly too. thanks. I will be replacing the tranny this winter anyway.
Reply
Old Oct 5, 2007 | 08:20 AM
  #6  
ssvert99's Avatar
LS1Tech Premium Sponsor
iTrader: (26)
 
Joined: Dec 2006
Posts: 3,490
Likes: 5
From: Central Illinois
Default

Moser rearend? is the torque arm bracket or the adapter bracket loose too? hmmmm. imagine that.
Reply
Old Oct 5, 2007 | 10:11 AM
  #7  
nahasapeemapetalon's Avatar
Thread Starter
12 Second Club
iTrader: (9)
 
Joined: Jun 2006
Posts: 1,051
Likes: 1
From: Grand Forks, North Dakota
Default

No the mount on the transmission is loose/shot/worn i think. The rearend mount is tight i put that on myself.
Reply
Old Oct 5, 2007 | 10:57 AM
  #8  
hazard2k's Avatar
Launching!
iTrader: (10)
 
Joined: Jun 2005
Posts: 244
Likes: 0
From: Rochester, NY
Default

Originally Posted by nahasapeemapetalon
No the mount on the transmission is loose/shot/worn i think. The rearend mount is tight i put that on myself.

If it was a moser 12 bolt, the bolts are notorios to loosen over time, but being that you have a 9" you dont have to worry about that.
Reply
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

 Verdad Gallardo
story-1

6 Common C5 Corvette Failures and What's Involved In Repairing Them

 Pouria Savadkouei
story-2

Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

 Verdad Gallardo
story-3

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-4

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-5

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
story-6

Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

 Verdad Gallardo
story-7

Awesome K5 Blazer Restomod Comes With C7 Corvette Power

 Verdad Gallardo
story-8

10 Camaros You Should Never Buy

 
story-9

10 LS Engine Myths That Refuse to Die

 Verdad Gallardo
Old Oct 5, 2007 | 02:22 PM
  #9  
half-n-half's Avatar
TECH Resident
iTrader: (7)
 
Joined: May 2004
Posts: 861
Likes: 0
From: Merrillville,In (chicago)
Default

i know you seem to have found the problem in the mounts, but it sure seems like a loose Driveshaft to me where it mounts to the rear end. might be worth a check
Reply
Old Oct 7, 2007 | 09:24 PM
  #10  
00WS6WHITE's Avatar
On The Tree
iTrader: (1)
 
Joined: Jan 2007
Posts: 125
Likes: 0
From: ALABAMA
Default

Mine did the same thing when I still had the stock l.c.a.'s on the car. I ended up tearing the bushing apart. Now I have double adj. l.c.a's on the car and it still does it but no where as bad. I think it is the locker in my car now that is doing it.

Jimmy
Reply




All times are GMT -5. The time now is 10:17 PM.

story-0
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-1
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-2
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-3
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-4
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-5
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-6
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
story-7
Awesome K5 Blazer Restomod Comes With C7 Corvette Power

Slideshow: A heavily reworked 1972 K5 Blazer swaps its off-road roots for a low-slung street-focused build with modern V8 power.

By Verdad Gallardo | 2026-03-09 18:08:45


VIEW MORE
story-8
10 Camaros You Should Never Buy

Slideshow: There are thousands of used Camaros on the market but we think you should avoid these 10

By | 2026-02-17 17:09:30


VIEW MORE
story-9
10 LS Engine Myths That Refuse to Die

Slideshows: Which one of these myths do you believe?

By Verdad Gallardo | 2026-01-28 18:10:11


VIEW MORE