| 2004-2007 Cadillac CTS-V General Discussion Discuss everything about the first generation Cadillac CTS-V that does NOT fall into either the Performance or Appearance Modification category. | Cadillac Forums: Diff Rebuild -- Is it worth it? 
09-18-09, 10:34 AM
|  | Mods on hold till diff gets fixed. Cadillac(s): 2005 CTS-V  | | Join Date: Jan 2005 Location: South Lyon, MI Age: 60 | | | Re: Diff Rebuild -- Is it worth it?
Quote:
Originally Posted by ewill3rd  Don't worry I am still watching this one.
I'll watch it but remember I can't see youtube at work 
We are websensed....
I don't mind, we have people that really beat up our bandwidth with the dumbest crap you have ever seen, they wait and wait for websense to go down and then run with it. | Thanks, ewill.
The vid is uploading to YouTube as I write this. Hopefully, I'll be linking it here within the hour. The sound is VERY evident in this clip.
EDIT: Here it is ...
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Last edited by rand49er; 09-18-09 at 10:40 AM.
Reason: add link
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09-18-09, 10:38 PM
|  | Cadillac Technician Cadillac(s): none | | Join Date: Nov 2005 Location: Alexandria, VA Age: 41 | | | Re: Diff Rebuild -- Is it worth it?
I'll listen to it again when I am awake.... that sounds bad.
hmmmmm
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09-19-09, 09:47 AM
| | Mods on hold till diff gets fixed. Cadillac(s): 2005 CTS-V | | Join Date: Jan 2005 Location: South Lyon, MI Age: 60 | | | Re: Diff Rebuild -- Is it worth it?
Quote:
Originally Posted by ewill3rd I'll listen to it again when I am awake.... that sounds bad.
hmmmmm | Thanks, ewill!  |
09-19-09, 10:37 AM
|  | Cadillac Owners Connoisseur Cadillac(s): '05 CTS-V, '00 SLS, 98 SLS, 89 Eldo, '80 Eldo | | Join Date: Mar 2006 Location: NYC Age: 38 | | | Re: Diff Rebuild -- Is it worth it?
What gear and RPM?
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09-19-09, 12:07 PM
| | Mods on hold till diff gets fixed. Cadillac(s): 2005 CTS-V | | Join Date: Jan 2005 Location: South Lyon, MI Age: 60 | | | Re: Diff Rebuild -- Is it worth it?
Fourth gear. RPM? Hm-m ... maybe 1100-1200, I suppose.
It seems like it's coming from the diff though I'm not absolutely certain. And, I think it's the same noise (just sounds a bit different) that I get when going over 45 MPH in 6th gear though that one is not as loud and is more of an in and out moaning/groaning kind of noise ... same character, same rough mix of frequencies or pitch. Oh, and I can't feel either in my hand on the shifter, in my butt on the seat, nor in my hands on the steering wheel. |
09-19-09, 12:50 PM
|  | Cadillac Owners Connoisseur Cadillac(s): 2005 CTS-V | | Join Date: Nov 2005 Location: Spring, Texas | | | Re: Diff Rebuild -- Is it worth it?
To me it sounds like a bearing, and I mean good old fashioned ball bearing. If it is a bearing, the fact that is intermittent suggests bearing that is not under constant load. That would not include, for example, the wheel bearings which usually make noise constantly when failing.
Having said that, I am not sure which part of the V it could be. |
09-19-09, 07:58 PM
| | Mods on hold till diff gets fixed. Cadillac(s): 2005 CTS-V | | Join Date: Jan 2005 Location: South Lyon, MI Age: 60 | | | Re: Diff Rebuild -- Is it worth it?
Quote:
Originally Posted by darkman ... sounds like a bearing, and I mean good old fashioned ball bearing ... | Nutz thought it was a pinion bearing when he heard it about a month ago. Is the pinion bearing a ball bearing? What about the bearing in the trans output shaft ... that's probably a roller bearing I'd imagine. Diff bearing would be easier ... |
09-19-09, 08:44 PM
| | Cadillac Owners Connoisseur Cadillac(s): 2005 CTS-V | | Join Date: Nov 2005 Location: Spring, Texas | | | Re: Diff Rebuild -- Is it worth it?
Quote:
Originally Posted by rand49er Nutz thought it was a pinion bearing when he heard it about a month ago. Is the pinion bearing a ball bearing? What about the bearing in the trans output shaft ... that's probably a roller bearing I'd imagine. Diff bearing would be easier ... | I was using the term ball bearing as interchangable with roller bearing - I really meant a bearing that works in a bearing race. The pinion bearing is a roller bearing and I believe the side loads/forces vary somewhat on the pinion in a V.
The Service Manual shows a replaceable bearing on the propeller shaft - but I keep hearing that the propshaft is not servcieable. Finally the CV on the drive axles are ball-based units. |
09-20-09, 12:42 AM
|  | Nucking Car Fut "If cool, must own" Cadillac(s): 2009 CTS-V, 60 Coupe Deville | | Join Date: Oct 2007 Location: Northeast Ohio hammer down Age: 41 | | | Re: Diff Rebuild -- Is it worth it?
^  Rand the FRONT joint is an enclosed serviceable capsule with 3 rollerbearings in a race. It can be pulled apart in your hands to reveal the bearings BUT mark the shaft to pinion bolts for index AND don't lose the direction that the races and bearings come out in. I believe they are eccentric. Should be sitting in well-packed grease, and could be worn. I now remember you telling me the diff was worked on recently (UUC bushing?), and it's common for people to mistakenly let the shaft hang on the trans (if it was unhooked).
In a Nutzshell,  , check the FRONT prop shaft joint. 
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09-20-09, 12:20 PM
| | Cadillac Technician Cadillac(s): none | | Join Date: Nov 2005 Location: Alexandria, VA Age: 41 | | | Re: Diff Rebuild -- Is it worth it?
You say some work was done on this car recently?
The pinion bearings are a roller type bearing.
One issue I see with some guys is when they take stuff apart to work on the diff they put the bolts back in the wrong places or backwards or something. If someone did that it can make things ground out.
I still wish I could hear it better, that recording is good but it is hard to hear the noise over the camera mount clicking, or it is just a distraction at least.
I just haven't heard that noise before.
It sounds almost like one time when one of my old helpers left a pinion nut loose but if no one has been working on that.... |
09-20-09, 05:34 PM
| | Mods on hold till diff gets fixed. Cadillac(s): 2005 CTS-V | | Join Date: Jan 2005 Location: South Lyon, MI Age: 60 | | | Re: Diff Rebuild -- Is it worth it?
Thanks, guyz!
Just had a guy (decent mechanic, too) install the UUC FW and a new slave with remote bleeder. THAT'S when I started hearing stuff.
I'll try to do another vid with better audio. Problem is, suppose to rain the next several days, so it'll be later this coming week.
Ain't this forum great or what?!! Got three or more of the best minds on here throwing ideas at me.  |
09-20-09, 10:28 PM
|  | CTS  ader Cadillac(s): 2006 CTS 3.6 // 2005 CTS-V | | Join Date: Dec 2006 Location: an I-294 traffic jam Age: 35 | | | Re: Diff Rebuild -- Is it worth it?
Do you have a cell phone with a voice memo recorder? If you can figure out where in your car the noise is loudest, you could just set the phone there. You could even go to the store and buy one of those digital recorders (I believe they are less than $20), and zip-tie it somewhere under the car. You might get better audio, and recording audio only, you could record more of it and the file size would be ALOT smaller. |
09-21-09, 08:00 AM
| | Cadillac Technician Cadillac(s): none | | Join Date: Nov 2005 Location: Alexandria, VA Age: 41 | | | Re: Diff Rebuild -- Is it worth it?
What kind of exhaust system is on this car? |
09-21-09, 08:11 AM
| | Mods on hold till diff gets fixed. Cadillac(s): 2005 CTS-V | | Join Date: Jan 2005 Location: South Lyon, MI Age: 60 | | | Re: Diff Rebuild -- Is it worth it?
Quote:
Originally Posted by JimmyH Do you have a cell phone with a voice memo recorder? ... | That's for old people! 
Actually, I'd have to look at my phone since I really don't know, but it may be a moot point as I just don't have time this week to do much outside my own little "techy" comfort zone ... too busy. I'll keep it in mind, though. 
If I do get a chance this week, I'll also reproduce the REALLY nasty noise while in fifth gear at 25 MPH. Not sure if it's the same source of not, but may be and may provide another clue. | | Cadillac Discussion Tools | | | 
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