Cadillac CTS-V 2004-2007 (Gen I) The Caddy with an Attitude...

Anyone experience a clunk with their CS 8.8 kit??

Thread Tools
 
Search this Thread
 
Old 08-13-2012, 12:46 PM
  #1  
TECH Veteran
Thread Starter
iTrader: (12)
 
NeverSatisfied02's Avatar
 
Join Date: Dec 2004
Location: Friendswood, TX
Posts: 4,137
Likes: 0
Received 0 Likes on 0 Posts

Default Anyone experience a clunk with their CS 8.8 kit??

Hey fellas,
Anyone here running the CS 8.8 still dealing with a clunk? My car still has that driveline slop and im not sure why. My buddy who had the car before me installed the 8.8. I know he got his own diff to save some money but obviously ordered the coated brackets, axels, eatin tru-trac, 4.10, etc all from creative steel. His stepdad is a gm mechanic so they did all the wrench work. The rear of the diff with that bracket doesn't look like it would move. Only thing I'm seeing that could be causing the clunk are the two bushings in the front of the diff. He left them stock because max at creative steel said if they look good, don't replace em because they rarely wear out. I'm thinking this could be my issue though.

Anyone else experience this clunk?

I'm considering ordering some poly or solid aluminum bushings for the 03 cobra which would obviously fit this diff. They offer both for it. Anyone else replaced the front two bushing on ur 8.8 with some aftermarket ones? Any input?
Old 08-13-2012, 12:55 PM
  #2  
TECH Junkie
iTrader: (3)
 
BudRacing's Avatar
 
Join Date: Dec 2006
Location: Dunwoody, GA
Posts: 3,544
Likes: 0
Received 5 Likes on 5 Posts

Default

I'd go poly over solid for sure. What's the rest of your driveline like?
Old 08-13-2012, 01:19 PM
  #3  
TECH Enthusiast
iTrader: (10)
 
jmargo's Avatar
 
Join Date: Jan 2012
Location: Nor Cal
Posts: 546
Likes: 0
Received 0 Likes on 0 Posts

Default

DSS driveshaft ?
Old 08-13-2012, 01:24 PM
  #4  
TECH Apprentice
iTrader: (32)
 
98cobra's Avatar
 
Join Date: Dec 2008
Posts: 321
Likes: 0
Received 0 Likes on 0 Posts
Default

I have the poly bushings. I have a clunk. Not sure if it's the driveshaft or play in the ring and pinion
Old 08-13-2012, 01:25 PM
  #5  
TECH Apprentice
iTrader: (32)
 
98cobra's Avatar
 
Join Date: Dec 2008
Posts: 321
Likes: 0
Received 0 Likes on 0 Posts
Default

I think the kit really needs a poly coupler from the transmission output to the driveshaft.. You need some give.
Old 08-13-2012, 01:56 PM
  #6  
TECH Enthusiast
 
Skidmarcx's Avatar
 
Join Date: May 2011
Location: Phoenix, AZ
Posts: 679
Likes: 0
Received 0 Likes on 0 Posts
Default

Mine has ton of slop... Max initially told me its normal for the TrueTrac carrier... I'm waiting to hear back from him to see if it's adjustable
Old 08-13-2012, 02:08 PM
  #7  
Staging Lane
 
COLEVETTE's Avatar
 
Join Date: Jan 2011
Posts: 96
Likes: 0
Received 0 Likes on 0 Posts
Default

What kind of locker or limited slip do you have? I have an eaton true-trac in my 9" and i can spin the pinion/driveshaft anout a 1/4 turn before the helical gears in the locker grab. It is highly annoying.
Old 08-13-2012, 02:35 PM
  #8  
TECH Veteran
Thread Starter
iTrader: (12)
 
NeverSatisfied02's Avatar
 
Join Date: Dec 2004
Location: Friendswood, TX
Posts: 4,137
Likes: 0
Received 0 Likes on 0 Posts

Default

My driveshaft is stock. Used an adaptor that worked nicely for the time being since the carrier bearing was still good. I'm waiting for a solid driveshaft to come out cause I'd like to get away from the two piece if possible.

Locker is whatever is included with the CS kit. Everything came from them new other than the diff casing itself. Pretty sure it's the eaton tru-trac 31 spline locker like yours since that's what they advertise is included on the CS website. Maybe the slop is in the locker then if yours does the same thing. My stock rubber diff bushings honestly look to be in good shape. Everything looks tight but I get a lot of slack in the driveline. Its annoying as hell but I've learned to drive around it for the most part. I'd still like to fix it though if there is a solution.
Old 08-13-2012, 02:44 PM
  #9  
TECH Apprentice
iTrader: (32)
 
98cobra's Avatar
 
Join Date: Dec 2008
Posts: 321
Likes: 0
Received 0 Likes on 0 Posts
Default

I have a stock carrier, used differential with 50k on it. Factory gear lash on mustangs is usually on the loose side
Old 08-13-2012, 02:53 PM
  #10  
TECH Enthusiast
 
Skidmarcx's Avatar
 
Join Date: May 2011
Location: Phoenix, AZ
Posts: 679
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by COLEVETTE
What kind of locker or limited slip do you have? I have an eaton true-trac in my 9" and i can spin the pinion/driveshaft anout a 1/4 turn before the helical gears in the locker grab. It is highly annoying.
That's about what mine has too... About 75 degrees of free play.
Old 08-13-2012, 02:56 PM
  #11  
TECH Veteran
Thread Starter
iTrader: (12)
 
NeverSatisfied02's Avatar
 
Join Date: Dec 2004
Location: Friendswood, TX
Posts: 4,137
Likes: 0
Received 0 Likes on 0 Posts

Default

Damn... So it's not the bushings at all. It's the actual carrier. That's depressing. Any way to snug it up?
Old 08-13-2012, 03:29 PM
  #12  
TECH Enthusiast
 
Skidmarcx's Avatar
 
Join Date: May 2011
Location: Phoenix, AZ
Posts: 679
Likes: 0
Received 0 Likes on 0 Posts
Default

Yea I was warned by Max that it is a noisy sumbitch... I didn't much care I'm just concerned about the lateral up and down play in the axles... Seals aren't leaking and the locker works like a champ, but will the excessive lash result in an axle snapping? I put in a message to Max on the Caddy forum
Old 08-13-2012, 03:41 PM
  #13  
TECH Veteran
Thread Starter
iTrader: (12)
 
NeverSatisfied02's Avatar
 
Join Date: Dec 2004
Location: Friendswood, TX
Posts: 4,137
Likes: 0
Received 0 Likes on 0 Posts

Default

Yeah... Mine solid and clean with no issues. Just that annoying clunk. I'd like to get rid of it and like you... I don't wanna tear anything up because of it.
Old 08-13-2012, 06:07 PM
  #14  
Launching!
iTrader: (3)
 
soulja's Avatar
 
Join Date: May 2012
Location: Michigan
Posts: 270
Likes: 0
Received 0 Likes on 0 Posts
Default

I have the CS 8.8 with a COBRA Diff and I have absolutely no clunk. I have the poly bushing on the diff also.
Old 08-13-2012, 06:13 PM
  #15  
TECH Veteran
Thread Starter
iTrader: (12)
 
NeverSatisfied02's Avatar
 
Join Date: Dec 2004
Location: Friendswood, TX
Posts: 4,137
Likes: 0
Received 0 Likes on 0 Posts

Default

Well I guess the poly bushing is worth a shot then before I go doing anything more involved to fix it. What brand bushing are you running and where did u order it?
Old 08-13-2012, 06:26 PM
  #16  
Launching!
iTrader: (3)
 
soulja's Avatar
 
Join Date: May 2012
Location: Michigan
Posts: 270
Likes: 0
Received 0 Likes on 0 Posts
Default

I got them from Summit Racing.

These are the ones:

http://www.summitracing.com/parts/PT...n/?prefilter=1
Old 08-13-2012, 06:43 PM
  #17  
TECH Enthusiast
 
Skidmarcx's Avatar
 
Join Date: May 2011
Location: Phoenix, AZ
Posts: 679
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by soulja
I have the CS 8.8 with a COBRA Diff and I have absolutely no clunk. I have the poly bushing on the diff also.
If you have the clutch style carrier then you probably won't have this problem...
Old 08-13-2012, 07:19 PM
  #18  
TECH Enthusiast
iTrader: (10)
 
jmargo's Avatar
 
Join Date: Jan 2012
Location: Nor Cal
Posts: 546
Likes: 0
Received 0 Likes on 0 Posts

Default

Originally Posted by soulja
I have the CS 8.8 with a COBRA Diff and I have absolutely no clunk. I have the poly bushing on the diff also.
Originally Posted by Skidmarcx
If you have the clutch style carrier then you probably won't have this problem...
Yep, Cobra clutched chunk and no clunk here either.
Old 08-13-2012, 08:33 PM
  #19  
TECH Veteran
Thread Starter
iTrader: (12)
 
NeverSatisfied02's Avatar
 
Join Date: Dec 2004
Location: Friendswood, TX
Posts: 4,137
Likes: 0
Received 0 Likes on 0 Posts

Default

Thanks for the link to the bushings. I'll try those before anything else. If that doesn't fix it, I'll just deal with it. It's solid... Just annoying.
Old 08-13-2012, 09:22 PM
  #20  
TECH Fanatic
 
shadyLS6's Avatar
 
Join Date: Apr 2009
Location: USA
Posts: 1,015
Likes: 0
Received 1 Like on 1 Post

Default

Prothane front diff bushings and new ford trac loc w/ carbon clutches. no slop or clunk in the drivetrain. sounds like a completely different car from stock. diff whine is gone, pinion lash is gone at low speed and while shifting, best mod i have done so far.

going catless and getting a street tune.. cant wait


Quick Reply: Anyone experience a clunk with their CS 8.8 kit??



All times are GMT -5. The time now is 06:39 PM.