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Old 20th April 2017, 05:26 PM   #1 (permalink)
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Clutch problem / traction control

Recently I feel like there's an odd loss of power. I'm also noticing the traction control coming on in unexpected situations when I'm not really pushing it at all (straight, dry and half depressed acceleration). Any ideas? Could traction control coming in be sign of the clutch slipping?

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Old 20th April 2017, 05:38 PM   #2 (permalink)
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Doubt it would be a clutch issue, I'd be leaning more towards an ABS/wheel speed sensor or a diff issue...... what tyres you running as that could cause an issue
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Old 20th April 2017, 05:56 PM   #3 (permalink)
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Doubt it would be a clutch issue, I'd be leaning more towards an ABS/wheel speed sensor or a diff issue...... what tyres you running as that could cause an issue
Mpss as installed by Litchfield. Larger than normal I believe but endorsed.

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Old 20th April 2017, 06:03 PM   #4 (permalink)
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Irrespective, I know a chap that had endorsed sizes and still had similar issues as there was too much flex in the sidewalls! Hard to believe I know but still! Changed his tyres and it worked fine ever since
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Old 20th April 2017, 08:00 PM   #5 (permalink)
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Originally Posted by james_barker View Post
Recently I feel like there's an odd loss of power. I'm also noticing the traction control coming on in unexpected situations when I'm not really pushing it at all (straight, dry and half depressed acceleration). Any ideas? Could traction control coming in be sign of the clutch slipping?

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Just to be clear are you seeing the ESP light come on? Also, are you experiencing this with the traction control in R mode or normal?

When I first purchased my GTR I used to think something was up as sometimes when booting it in the bone dry the traction would kick in and cut the power unexpectedly. If you have a tuned GTR (In my case 4.25) that cut in power can feel quite significant. I've found that in normal mode the traction control is pretty intrusive and even over a slight undulation in the road will cut the power (Which is what I found out not long after purchasing). In R mode it's just right for me as it allows you to put the power down but you obviously still have the assistance there.

I do still sometimes get TC kicking in in R mode, but it's easy to forget that with the car being Rear driven most of the time it doesn't take much for the car to detect some slip if you have 600+ horses going to the rear!

Just a thought, hopefully it's nothing.
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Old 20th April 2017, 08:44 PM   #6 (permalink)
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I do think its down to the incorrect tyre sizes ( im on mpss 305/275 ) causing the traction control to be over sensitive - i use the same road to do datalogs and it always activates at the same place in 3rd gear - the logs show the throttles shutting but with TC off it does not spin the wheels
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Old 21st April 2017, 08:48 AM   #7 (permalink)
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I do think its down to the incorrect tyre sizes ( im on mpss 305/275 ) causing the traction control to be over sensitive - i use the same road to do datalogs and it always activates at the same place in 3rd gear - the logs show the throttles shutting but with TC off it does not spin the wheels
Thanks Terry. Maybe it is the tyres - clearly a few people have had this although it's strange it was fine for a while on these tyres. How do you manage it? Switch it to race for tc?

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Old 21st April 2017, 09:34 AM   #8 (permalink)
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Thanks Terry. Maybe it is the tyres - clearly a few people have had this although it's strange it was fine for a while on these tyres. How do you manage it? Switch it to race for tc?

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I turn the TC off
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Old 21st April 2017, 09:41 AM   #9 (permalink)
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I turn the TC off
You crazy bast*rd!
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Old 21st April 2017, 01:02 PM   #10 (permalink)
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You crazy bast*rd!
My thoughts exactly. I'm looking to restore power, not widow my wife.

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Old 21st April 2017, 01:23 PM   #11 (permalink)
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I am mapping the car - ruins the data log if the throttles close due to TC kicking in
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Old 22nd April 2017, 05:54 PM   #12 (permalink)
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I had the same issue running MPSS with 3rd gear when booting it would cut back.
I put the car in R mode on the traction and it seems to be okay.
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Old 22nd April 2017, 08:15 PM   #13 (permalink)
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I'm running those tyre sizes with MPPS and have never had that traction issue you are describing.
I did have it before running Bridgestones and it was cured with a wheel alignment. Tracking was slightly out which made a sensor kick in very unnecessarily.
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Old 22nd April 2017, 09:25 PM   #14 (permalink)
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I do think its down to the incorrect tyre sizes ( im on mpss 305/275 ) causing the traction control to be over sensitive - i use the same road to do datalogs and it always activates at the same place in 3rd gear - the logs show the throttles shutting but with TC off it does not spin the wheels
I have the same issue with cup2s, its in 4th gear at about 5k RPM it just cuts power for a few seconds and traction control light comes on.
Its very frustrating and can only put it down to the over sized tyres as you say, didnt have the issue on the stock run flats
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Old Yesterday, 05:31 PM   #15 (permalink)
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Been driving today in R traction control mode and the problem seems to have vanished, although the back end almost bit me giving it the juice coming round a corner. Definitely needs a touch more respect.

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Old Yesterday, 07:34 PM   #16 (permalink)
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Stock R35 will flash traction a fair bit in N mode.
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Old Yesterday, 08:04 PM   #17 (permalink)
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Stock R35 will flash traction a fair bit in N mode.
Stage 4 even more so...

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