LS1TECH - Camaro and Firebird Forum Discussion

Automatic Transmission 2-Speed thru 10-Speed GM Autos | Converters | Shift Kits
Sponsored by:
Sponsored by:

Look at this input drum. Is this ok?

Thread Tools
 
Search this Thread
 
Old Apr 22, 2007 | 09:08 PM
Share
  #1  
Kiss_My_99SS's Avatar
Kiss_My_99SS
Thread Starter
Launching!
iTrader: (8)
 
Joined: Apr 2005
Posts: 203
Likes: 0
From: TN
Default Look at this input drum. Is this ok?
Are these cracks normal? Why are the 2 holes bigger on one and not the other?
drum1
drum2
drum3
drum4
Last edited by Kiss_My_99SS; Apr 22, 2007 at 10:23 PM.
Reply
0
Old Apr 22, 2007 | 09:35 PM
Share
  #2  
FLT's Avatar
FLT
FormerVendor
iTrader: (1)
 
Joined: Sep 2005
Posts: 6,620
Likes: 4
From: Wood Dale, Illinois
Default
The holes are different sizes because I believe this is how the balance the drums. As far as the cracks, your pictures are kind of unclear. Sorry They might be just marks from when the drum was casted.
Reply
0
Old Apr 22, 2007 | 10:13 PM
Share
  #3  
Kiss_My_99SS's Avatar
Kiss_My_99SS
Thread Starter
Launching!
iTrader: (8)
 
Joined: Apr 2005
Posts: 203
Likes: 0
From: TN
Default
I can feels some of the cracks with my finger nail. How can i tell if they are just casting flaws? My old drum does not have any marks like this. Is it common to see marks like these?
Reply
0
Old Apr 22, 2007 | 10:22 PM
Share
  #4  
FLT's Avatar
FLT
FormerVendor
iTrader: (1)
 
Joined: Sep 2005
Posts: 6,620
Likes: 4
From: Wood Dale, Illinois
Default
I have seen it in the past. Casting marks at times do look like cracks. I usually will look on the inside of the drum and see if it is a clean break. If you have doubts do not use it. By the way your links do not work.
Reply
0
Old Apr 22, 2007 | 10:24 PM
Share
  #5  
Kiss_My_99SS's Avatar
Kiss_My_99SS
Thread Starter
Launching!
iTrader: (8)
 
Joined: Apr 2005
Posts: 203
Likes: 0
From: TN
Default
I just fixed the links you should be able to tell more now.
Thanks for your help.
Reply
0
Old Apr 22, 2007 | 10:26 PM
Share
  #6  
Kiss_My_99SS's Avatar
Kiss_My_99SS
Thread Starter
Launching!
iTrader: (8)
 
Joined: Apr 2005
Posts: 203
Likes: 0
From: TN
Default
The inside of the drum looks fine no marks.
Reply
0
Old Apr 22, 2007 | 10:53 PM
Share
  #7  
2002_Z28_Six_Speed's Avatar
2002_Z28_Six_Speed
TECH Veteran
iTrader: (19)
 
Joined: Aug 2005
Posts: 4,538
Likes: 1
From: Wash, DC
Default
I would say that it is not a crack. Looking at pics 3+4 I noticed that the mark in question didn't go into the recessed, machined area and if it was a crack it should be visable there. The depth of the surface imperfection is minute.

Looks like surface imperfection from die casting.

Pic 2 doesn't look like this though sigh
Reply
0

Trending Topics

Old Apr 22, 2007 | 10:55 PM
Share
  #8  
FLT's Avatar
FLT
FormerVendor
iTrader: (1)
 
Joined: Sep 2005
Posts: 6,620
Likes: 4
From: Wood Dale, Illinois
Default
The links work for me now. It does look like a casting mark to me.
Reply
0
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

6 Gifts Neither Your Dad Nor Grad Will Shove Into the 'Trinket Drawer'

 Brett Foote
story-1

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

 Pouria Savadkouei
story-2

Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine

 Verdad Gallardo
story-3

7 Most Reliable High-Performance Engines GM Has Ever Built

 Verdad Gallardo
story-4

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

 Verdad Gallardo
story-5

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

 Pouria Savadkouei
story-6

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

 Verdad Gallardo
story-7

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-8

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-9

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
Old Apr 23, 2007 | 12:05 AM
Share
  #9  
performabuilt's Avatar
performabuilt
LS1Tech Sponsor
15 Year Member
Liked
Loved
Community Favorite
iTrader: (25)
 
Joined: Aug 2006
Posts: 10,854
Likes: 80
From: BLOOMSBURG PA
Default
agreed from looking at links they are just casting marks
__________________
Built..PerformaBuilt..Tough

Call 888-744-6542


Reply
0
Old Apr 23, 2007 | 01:13 AM
Share
  #10  
smoknta's Avatar
smoknta
TECH Enthusiast
 
Joined: Jul 2003
Posts: 697
Likes: 0
From: Evansville, IN
Default
Sand it down slightly and see if they go away. If it is a casting mark, it should sand right away. If it does not go away it is a crack.
Reply
0
Old Apr 23, 2007 | 05:32 PM
Share
  #11  
PBA's Avatar
PBA
TECH Resident
20 Year Member
 
Joined: May 2006
Posts: 969
Likes: 119
Default
Yes, they look like casting marks, have seen this a few times.
Reply
0
Back to Subforum
Automatic Transmission
View Next Unread
Lucas Racing Semi-Synthetic ATF?




Advanced Search

All times are GMT -5. The time now is 10:58 AM.

story-0
6 Gifts Neither Your Dad Nor Grad Will Shove Into the 'Trinket Drawer'

Don't get dad new socks or a grill brush this year.

By Brett Foote | 2026-06-09 14:55:56


VIEW MORE
story-1
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-2
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-3
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-4
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-5
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-6
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-7
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-8
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-9
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