: Questions about clutch replacement for 04 CTS-V



Jalyousef
02-15-13, 05:40 PM
I have an 04 CTS-V that I bought at 40k miles. I do not know if the original owner replaced any clutch parts or not before I had purchased it. I now have 75k miles on it, and have not really noticed anything wrong with the clutch, however it is a little more difficult as far as shifting goes, especially reverse.

I'm wondering what are some signs of my clutch needing to be replaced? I've been thinking about buying the whole LS7 clutch kit, but don't want to do it if it's not needed.
Thanks!

PISNUOFF
02-15-13, 05:45 PM
Have you bled the clutch fluid?

rand49er
02-15-13, 05:53 PM
I doubt you need a clutch. But, there are two things you could do that may help you. First of all, check your hydraulic clutch fluid level. These cars are notorious for losing clutch fluid making shifting less than it can be. You could go one step further and have it replaced and bled. If you're still having problems, there are bushings that can be replaced in the linkage. There's a thread floating around by Cadzilla that is the most inclusive shifter bushing thread I've ever seen. Truly amazing.

To check your clutch, drive about 50-ish MPH in sixth gear. Push the clutch pedal in, rev the motor slightly, then let the clutch back out somewhat abruptly. If it grabs with a jerk, then it's good. If it only slowly engages, your clutch is on its way out.

boomer06
02-17-13, 12:14 AM
if you end up needing a new clutch i have the stock clutch out of an 07 V that the guy gave me whenever i bought mine. shoot me a text if your interested. 512-815 nine four 35

Mn800r
02-17-13, 09:24 AM
If you do a new clutch, take a look at monster as I replaced mine with a LS7 set-up and hate where the pedal grabs,just off the floor sucks ass.

Scott2012
02-17-13, 07:23 PM
If you do a new clutch, take a look at monster as I replaced mine with a LS7 set-up and hate where the pedal grabs,just off the floor sucks ass.

Which Monster would you go with?
Did you do the LS7 kit from Lindsey Cadillac?
I have gear chatter and plan on getting a new flywheel, clutch, slave in the next few months

darkman
02-17-13, 08:23 PM
Which Monster would you go with?
Did you do the LS7 kit from Lindsey Cadillac?
I have gear chatter and plan on getting a new flywheel, clutch, slave in the next few months

The forum members here that have installed Monster Stage 3 clutches have had problems. On the other hand those with lower stage Monster clutches have not reported the same problems. For expample:http://www.cadillacforums.com/forums/2004-2007-cadillac-cts-v-performance/175956-monster-clutch-stage-2-5-15lb.html

Manseeno
02-18-13, 12:12 AM
I have a Monster Level 1 that will be getting installed into my '04 soon (hopefully this week); I'll report back once it's in.

etcts-v
02-18-13, 04:25 PM
If you do a new clutch, take a look at monster as I replaced mine with a LS7 set-up and hate where the pedal grabs,just off the floor sucks ass.

Your pedal never came up higher? I have an LS7 in mine and the pedal is perfect, I did bleed the heck out of it when I installed it.

NC-V
02-18-13, 11:50 PM
Monster Stage 2 here, very happy with engagement position with LS7 slave and/or Monster slave (engage at same point, not at bottom, not at top). Not grabby, easy to start from stop. And much better performance than the stock clutch/flywheel.

trukk
02-19-13, 09:34 AM
My oem clutch was still going strong at 120k miles. the Dual Mass flywheel on the other hand was clunking like crazy.

I replaced mine with the katech Twin Disk. It is expensive BUT you get OEM quality, and the performance of a twin disk. One of the best mods I've done to my car. It revs like crazy now. Was blown away by the difference. I should have done this mod a LONG time ago.

-Chris

WesH8398
02-23-13, 07:49 AM
Your pedal never came up higher? I have an LS7 in mine and the pedal is perfect, I did bleed the heck out of it when I installed it.
Did you go with an OEM LS7 flywheel, or lightweight? What'd ya think of the upgrade? Can you feel a difference?

FuzzyLogic
02-23-13, 09:50 AM
If you do a new clutch, take a look at monster as I replaced mine with a LS7 set-up and hate where the pedal grabs,just off the floor sucks ass.

If you over-torqued your pressure plate bolts, the fingers on the pressure plate will retract inwards and you'll always be stuck with an "on-the-floor" disengagement point. If I had to guess, you followed the LS7 Z06 user's manual, which specifies 15 lb-ft, 37 lb-ft, and 74 lb-ft star bolt sequencing (if you used torque specs at all).

Through testing, I found that the LS7 pressure plate fingers begin to move inward right after you cross the 50 lb-ft threshold. At 74 ft-lbs, those fingers have retracted so far inwards that you'll be lucky to get the clutch disengaged at all. After having the transmission in and out of the car 7 times in the summer of 2010, I discovered that the stock CTS-V 52 ft-lb torque specification was just about perfect for the LS7 clutch swap.

I recommend using blue locktite and torquing your pressure plate bolts to 50 ft-lb. I've been running that way for 12,000 miles with zero problems. Since I'm about to replace this clutch with a McLeod RXT, I can also provide exit data on the outgoing LS7 clutch, if requested.

rand49er
02-23-13, 11:00 AM
... After having the transmission in and out of the car 7 times in the summer of 2010 ...Fuzzy, you and a couple of other guys on here (PISNUOFF is one) amaze me with your tenacity on this stuff. My patience would've worn thin after the second time.

FuzzyLogic
02-23-13, 11:22 AM
Fuzzy, you and a couple of other guys on here (PISNUOFF is one) amaze me with your tenacity on this stuff. My patience would've worn thin after the second time.

This is my only car. So, for me, it's not a question of "do I want to get it exactly right"--I have to.

trukk
02-23-13, 12:50 PM
This is my only car. So, for me, it's not a question of "do I want to get it exactly right"--I have to.

WTG, on getting chit done right!

Why are you going McLeod instead of Katech? Just curious. The Katech will certainly give you great performance up to significant HP/TQ increases (way above where you and I are, and you can go with the R if you need to go really high). Is the McLeod significantly less expensive?

-Chris

FuzzyLogic
02-23-13, 01:19 PM
WTG, on getting chit done right!

Why are you going McLeod instead of Katech? Just curious. The Katech will certainly give you great performance up to significant HP/TQ increases (way above where you and I are, and you can go with the R if you need to go really high). Is the McLeod significantly less expensive?

-Chris

I believe that PISNUOFF utterly wrecked an OEM LS9 clutch on his 416 CID LS3, and given my ultimate 750 RWHP goal on a similar motor + cog-driven TVS2300, I didn't want to touch that clutch. Plus the McLeod is hudnreds of dollars cheaper. Pressure plate weight for both units is 13 lbs, but the McLeod is several inches smaller in diameter (lower moment of inertia). The McLeod is easily rebuildable and replacement friction discs are widely available.

Please skim the group buy thread (especially Post #4), and see if you have any follow-up questions.

http://ls1tech.com/forums/cadillac-cts-v/1615674-group-buy-opportunity-mcleod-rxt-twin-disc-1000-hp-ceramic-clutch.html

trukk
02-23-13, 04:32 PM
I believe that PISNUOFF utterly wrecked an OEM LS9 clutch on his 416 CID LS3, and given my ultimate 750 RWHP goal on a similar motor + cog-driven TVS2300, I didn't want to touch that clutch. Plus the McLeod is hudnreds of dollars cheaper. Pressure plate weight for both units is 13 lbs, but the McLeod is several inches smaller in diameter (lower moment of inertia). The McLeod is easily rebuildable and replacement friction discs are widely available.

Please skim the group buy thread (especially Post #4), and see if you have any follow-up questions.

http://ls1tech.com/forums/cadillac-cts-v/1615674-group-buy-opportunity-mcleod-rxt-twin-disc-1000-hp-ceramic-clutch.html

LOL P-U-O wrecks everything ;) DID he have a LS9 twin, or an LS7 single?

I can just go by my experience. At my power levels the LS9X is awesome. Can't tell any livability issues from stock, even with a lot less weight on the FW/Clutch combo. Haven't heard any issues with the guys going big with the LS9R heavier duty clutch.

Do you know off hand what the exact sizes of the LS9 twin disk as opposed to the McLeod twin disk? I *definately* felt a huge difference going from the boat anchor stock clutch flywheel, to the smaller diameter and much less weight Katech solution, so I can appreciate your want and wish to go with less weight *and* smaller diameter.

Bottom line is I've seem a lot of issues repoted on here over the years on non OEM clutches. Never heard any about Katech (until you pointed this out.)

Good luck with your build!

-Chris

HAMSTAR
02-24-13, 12:47 AM
Sounds like a collapsed transmission mount. Search for information on the revshift insert.
I have an 04 CTS-V that I bought at 40k miles. I do not know if the original owner replaced any clutch parts or not before I had purchased it. I now have 75k miles on it, and have not really noticed anything wrong with the clutch, however it is a little more difficult as far as shifting goes, especially reverse.

I'm wondering what are some signs of my clutch needing to be replaced? I've been thinking about buying the whole LS7 clutch kit, but don't want to do it if it's not needed.
Thanks!

PISNUOFF
02-24-13, 09:09 AM
Hahhaaha, I do wreck everything. The straps on two separate LS9 pressure plates broke on me with my 418. I went with the RPS twin which is a strapless design. It has held up for two years of my abuse. The discs are pretty worn down but nothing broke. There is a replacement pp and disc kit that is also readily available. I highly recommend staying away from a strapped design.

With my cammed LS2 I ran an LS7 clutch. Went through my first pp in about six months with many track days. It got to the point to where I couldn't push the pedal down at high rpms. The second one lasted 1.5 years and was still good when I removed it from service.

RyRidesMotoX
02-26-13, 06:05 AM
Pissinuoff... Is there anything on the car you haven't broken yet? Lol it seems like every thread I read someone always says... Ask PUO he broke that once.

Twitch
02-26-13, 09:29 AM
Pissinuoff... Is there anything on the car you haven't broken yet? Lol it seems like every thread I read someone always says... Ask PUO he broke that once.
I typed that into google and my computer crashed :confused:

BTW +1 on bleeding the fluid. PITA to get to though.

PISNUOFF
02-26-13, 10:15 AM
I guess it's a good thing it doesn't bother me too much when stuff breaks. But....I didn't build it to look at it.

Manseeno
04-12-13, 09:09 PM
I have a Monster Level 1 that will be getting installed into my '04 soon (hopefully this week); I'll report back once it's in.

Hi all, just reporting back as promised now that I'm about 350 miles into the 500 mile break-in; I can say I'm very happy with this clutch kit thus far. I'll go more in depth if anyone is interested; just let me know.

philistine
04-13-13, 01:11 AM
I'm so confused on clutch replacement...seems hit or miss on the forums. Seems the light flywheel can cause engine shut off at idle...pedal stomp - dies. I thought the Monster level 3 looked pretty good. Then there is the OEM competition of using the LS7 kit. Just seems so fussy for something so simple.

Glad the Monster level 1 worked out - I believe that one is the stock replacement without margin for forced induction.

PJGross
04-15-13, 11:37 AM
To the OP, I agree with Hamstar, the trouble getting into reverse sounds more like a sagging transmission mount. Well documented on here. 75k on a stock V clutch doesn't sound like much at all. I just turned 100k, with 80k maggied and 60k me driving. Stock clutch still going strong. My tires slip all the time, though. ;)
I have funds set aside for a clutch, and I was leaning to the Katech LS9 (since they're in town) but the McLeod thread has me thinking I could save some $$ going that route. I doubt Katech would want to install a McLeod, though, so I'd have to find someone else around here for the install.

Good luck, but I'd say you got another 25k miles + to go if you're not having clutch issues.

-PJ

trukk
04-16-13, 09:50 AM
To the OP, I agree with Hamstar, the trouble getting into reverse sounds more like a sagging transmission mount. Well documented on here. 75k on a stock V clutch doesn't sound like much at all. I just turned 100k, with 80k maggied and 60k me driving. Stock clutch still going strong. My tires slip all the time, though. ;)
I have funds set aside for a clutch, and I was leaning to the Katech LS9 (since they're in town) but the McLeod thread has me thinking I could save some $$ going that route. I doubt Katech would want to install a McLeod, though, so I'd have to find someone else around here for the install.

Good luck, but I'd say you got another 25k miles + to go if you're not having clutch issues.

-PJ

The OME clutch's last and last. The Dual Mass flywheel though, not so much.

I'll continue to go to bat for the Katech Clutch. OEM reliability/feel wiht twin disk performance. *ZERO* driveablity issues, even with the very light flywheel (proven in DC rush hour traffic). The only challenge is the price.

I would do it again in a heartbeat. Thinking about it for my 20k miles V2.

-Chris

lollygagger8
04-16-13, 10:33 AM
Bleed the clutch first.

If you have trouble getting into reverse, go to 4th gear, then shift into reverse. Works everytime for me.

Stage 3 Monster Clutch here. If you aren't going to add 500 HP on top of what you have now, stick with the Stage 2 and you'll be happy. Stage 3 is way overkill, and chatters since it's a puck style.

Here's my writeup:

http://www.cadillacforums.com/forums/2004-2007-cadillac-cts-v-performance/181141-monster-clutch-install.html

rand49er
04-16-13, 06:34 PM
The OME clutch's last and last. The Dual Mass flywheel though, not so much.

I'll continue to go to bat for the Katech Clutch. OEM reliability/feel wiht twin disk performance. *ZERO* driveablity issues, even with the very light flywheel ... The only challenge is the price.

I would do it again in a heartbeat ... ^^^ Yeah all that. Love my Katech LS9 kit. I'd be willing to bet that ronr still loves his, too.

And don't pay any attention to that PISNUOFF guy! :thepan: If he was a GM durability test driver, the dang car would've been built to last a million years the way the rest of us drive.

04cts v
04-16-13, 10:12 PM
400 miles on my Monster Level 2 with the light flywheel...works great and motor likes the weight reduction. No chatter and clutch feels close to stock....highly recommend Monster...great customer service too!