Built TT = Slipping clutch = TRAC light ?
#1
Registered User
Thread Starter
iTrader: (1)
Join Date: Aug 2003
Location: Ottawa, ON, Canada
Posts: 505
Likes: 0
Received 0 Likes
on
0 Posts
Built TT = Slipping clutch = TRAC light ?
Hi;
I have recently built the block on my APS TT. I’m boosting 18-19psi and I should be close to 600whp now. I also have an ATS dual-carbon clutch (had it for ~40,000miles). I’ve had my clutch completely slip on me a few times: at full boost around 4700rpm, the RPM went to redline with the car not accelerating and I left white clouds behind. This happened about 5-6 times in the last several weeks. In itself, that is pretty serious, although it’s not happening all the time thankfully.
But I also suspect that it’s slipping a little bit most of the time under full boost. If I leave my traction control active, the TRAC light will flash in 4th and 5th gear at full boost. I’m pretty sure it’s not spinning the rear tires (305s r-coumpound). So my question is: when the clutch is slipping, does the TRAC light come on?
I’ll talk to Sharif at Forged Perf to get my clutch beefed up.
Thanks!
I have recently built the block on my APS TT. I’m boosting 18-19psi and I should be close to 600whp now. I also have an ATS dual-carbon clutch (had it for ~40,000miles). I’ve had my clutch completely slip on me a few times: at full boost around 4700rpm, the RPM went to redline with the car not accelerating and I left white clouds behind. This happened about 5-6 times in the last several weeks. In itself, that is pretty serious, although it’s not happening all the time thankfully.
But I also suspect that it’s slipping a little bit most of the time under full boost. If I leave my traction control active, the TRAC light will flash in 4th and 5th gear at full boost. I’m pretty sure it’s not spinning the rear tires (305s r-coumpound). So my question is: when the clutch is slipping, does the TRAC light come on?
I’ll talk to Sharif at Forged Perf to get my clutch beefed up.
Thanks!
#4
Registered User
Thread Starter
iTrader: (1)
Join Date: Aug 2003
Location: Ottawa, ON, Canada
Posts: 505
Likes: 0
Received 0 Likes
on
0 Posts
Thanks! I'm just trying to figure out why the SLIP light would come on at WOT (full 18psi boost) in fourth and fifth gear. The rear tires can't possibly be spinning at that speed!
#5
Registered User
iTrader: (19)
Hi;
I have recently built the block on my APS TT. I’m boosting 18-19psi and I should be close to 600whp now. I also have an ATS dual-carbon clutch (had it for ~40,000miles). I’ve had my clutch completely slip on me a few times: at full boost around 4700rpm, the RPM went to redline with the car not accelerating and I left white clouds behind. This happened about 5-6 times in the last several weeks. In itself, that is pretty serious, although it’s not happening all the time thankfully.
But I also suspect that it’s slipping a little bit most of the time under full boost. If I leave my traction control active, the TRAC light will flash in 4th and 5th gear at full boost. I’m pretty sure it’s not spinning the rear tires (305s r-coumpound). So my question is: when the clutch is slipping, does the TRAC light come on?
I’ll talk to Sharif at Forged Perf to get my clutch beefed up.
Thanks!
I have recently built the block on my APS TT. I’m boosting 18-19psi and I should be close to 600whp now. I also have an ATS dual-carbon clutch (had it for ~40,000miles). I’ve had my clutch completely slip on me a few times: at full boost around 4700rpm, the RPM went to redline with the car not accelerating and I left white clouds behind. This happened about 5-6 times in the last several weeks. In itself, that is pretty serious, although it’s not happening all the time thankfully.
But I also suspect that it’s slipping a little bit most of the time under full boost. If I leave my traction control active, the TRAC light will flash in 4th and 5th gear at full boost. I’m pretty sure it’s not spinning the rear tires (305s r-coumpound). So my question is: when the clutch is slipping, does the TRAC light come on?
I’ll talk to Sharif at Forged Perf to get my clutch beefed up.
Thanks!
my thought is your vdc or traction control is kicking and you are mistaking it for a slipping clutch. Your tires may not be spinning, but they are turning (accelerating) out of the parameters programmed into your vds or traction control system. Thus making them think your tires are spinning and the systems kicking in.
Try running with the VDC and traction control systems completely off and see what you have. If properly warmed up, I doubt your clutch is slipping.
No it does not come on due to a clutch slipping
#6
Registered User
Thread Starter
iTrader: (1)
Join Date: Aug 2003
Location: Ottawa, ON, Canada
Posts: 505
Likes: 0
Received 0 Likes
on
0 Posts
Hummm... OK, thanks a lot. With VDC off, I can not normally feel the clutch slipping, but it did happen 6-7 times where the RPM went to redline suddenly with the car not accelerating anymore.
#7
Registered User
iTrader: (2)
Join Date: Jan 2004
Location: NW Ohio
Posts: 1,331
Likes: 0
Received 0 Likes
on
0 Posts
Paul, I think I'm having the same issue with my Exedy Twin. I realize you need to warm it up a little for WOT pulls but recently it's been slipping much more and I've been redlining as well in 3rd and 4th gear, with or without my VDC on. My clutch only has 10,000 miles on it and I've never tracked it.
Last edited by BrianLG35C; 06-22-2009 at 08:02 AM.
Trending Topics
#8
hi
iTrader: (15)
Join Date: Sep 2005
Location: Baton Rouge, LA
Posts: 2,056
Likes: 0
Received 0 Likes
on
0 Posts
I have a twin disc that will slip from time to time when it is not warm (3k rpm's to bouncing off the rev limiter in a split second).
With that said my car falls on its face with VDC is on if any boost is built. It will show slip and act an ***. If i leave it and and do this a few times, it will show a permanent slip until i restart the car.
With that said my car falls on its face with VDC is on if any boost is built. It will show slip and act an ***. If i leave it and and do this a few times, it will show a permanent slip until i restart the car.
#9
Registered User
iTrader: (2)
Join Date: Apr 2008
Location: Southeast
Posts: 663
Likes: 0
Received 0 Likes
on
0 Posts
Paul, I think I'm having the same issue with my Exedy Twin. I realize you need to warm it up a little for WOT pulls but recently it's been slipping much more and I've been redlining as well in 3rd and 4th gear, with or without my VDC on. My clutch only has 10,000 miles on it and I've never tracked it.
On my car, if the clutch is properly heated before WOT then I have never experienced a slip to date. When it has slipped the revs have not gone to redline. What happens is you feel a loss of power and torque and you can see the rpms going higher but never get above 5K rpm. On my car this heats the clutch and it grabs and thats the end of it. After it slips once, you cannot get it to do it again.
I'm at 511whp DD.
#10
Registered User
iTrader: (2)
Join Date: Jan 2004
Location: NW Ohio
Posts: 1,331
Likes: 0
Received 0 Likes
on
0 Posts
My GTM Exedy Twin has around 8K miles on it. It has started slipping occassionally shifting into 3rd at WOT. It does not slip as bad as you describe in your post.
On my car, if the clutch is properly heated before WOT then I have never experienced a slip to date. When it has slipped the revs have not gone to redline. What happens is you feel a loss of power and torque and you can see the rpms going higher but never get above 5K rpm. On my car this heats the clutch and it grabs and thats the end of it. After it slips once, you cannot get it to do it again.
I'm at 511whp DD.
On my car, if the clutch is properly heated before WOT then I have never experienced a slip to date. When it has slipped the revs have not gone to redline. What happens is you feel a loss of power and torque and you can see the rpms going higher but never get above 5K rpm. On my car this heats the clutch and it grabs and thats the end of it. After it slips once, you cannot get it to do it again.
I'm at 511whp DD.
Thread
Thread Starter
Forum
Replies
Last Post
Colombo
Forced Induction
35
11-09-2020 10:27 AM