Clutch Shudders on Downshift
#1
Clutch Shudders on Downshift
I just bought a 2007 TL Type-S MT.
When downshifting into 2nd or 3rd the clutch often shudders. Not horribly, but noticeably. Anyone else notice this?
When downshifting into 2nd or 3rd the clutch often shudders. Not horribly, but noticeably. Anyone else notice this?
#4
Team Owner
#5
Intermediate
I think I know what you mean. If you "downshift" meaning from say 4th to 3rd and don't rev match properly, the clutch shudders until the revs match in 3rd. I believe this is due to the clutch's slave cylinder check valve but not 100% sure.
This happens on mine when I don't rev match..
It's not really an issue, although I've never noticed this on other cars.
2007 TL-S 6MT
This happens on mine when I don't rev match..
It's not really an issue, although I've never noticed this on other cars.
2007 TL-S 6MT
#6
![Red face](https://acurazine.com/forums/images/icons/icon11.gif)
I think I know what you mean. If you "downshift" meaning from say 4th to 3rd and don't rev match properly, the clutch shudders until the revs match in 3rd. I believe this is due to the clutch's slave cylinder check valve but not 100% sure.
This happens on mine when I don't rev match..
It's not really an issue, although I've never noticed this on other cars.
2007 TL-S 6MT
This happens on mine when I don't rev match..
It's not really an issue, although I've never noticed this on other cars.
2007 TL-S 6MT
#7
Registered Member
If you downshift without double clutching or rev-matching, which of course is very bad, a healthy clutch should not shutter. If it shutters when doing this, it could be due to a scored friction disk or one with not much friction material left on its surface.
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#8
Team Owner
I completely agree. I've never had one shudder on downshifts unless it was glazed or whatever you want to call it. The one exception was a friend that ran a 3 puck racing clutch in his Porsche, what a nightmare on the street.
#9
Registered Member
As for the shuttering, I would almost bet it's caused by the dual mass flywheel. Being a two-piece unit with springs, it is a flywheel's version of wheel hop, also called spring wind up. What's your thoughts?
Last edited by SouthernBoy; 03-02-2011 at 03:07 PM.
#10
I'm at 76k now, so I'm out of warranty, but do you think I could get the dealer to fix that since they have done previous work with the tranny??
#11
Registered Member
I doubt it, especially if your clutch is acting properly under normal driving conditions. Besides, Acura considers a clutch to be a wear item, which it is, and I don't know how they handle such problems.
#12
Cruisin'
My 2008 TL-S was doing the same thing. It is currently in the shop for repairs to the transmission due to the "third gear issue" Mine was exhibiting the same type of shudder/stutter that you were describing. While the tranny was out I had them inspect the clutch and flywheel. I was told the flywheel was ok with no spots or any signs of friction or heat damage. The clutch was in decent shape as it only had 57,000km but I had it replaced just to start of fresh. I wont be getting my car back until next week as apparently after the third gear rebuild the car will not shift into reverse as the synchro is shot?? I was told by the tech that this sometimes occurs during a rebuild. Did the tech screw up and damage this synchro during the disassembly process or reassembly process? Anyone else see this type of issue? Even after all of this...I cant wait to get my bum back into that sweet two tone leather seat!!
#13
Racer
My 2008 TL-S was doing the same thing. It is currently in the shop for repairs to the transmission due to the "third gear issue" Mine was exhibiting the same type of shudder/stutter that you were describing. While the tranny was out I had them inspect the clutch and flywheel. I was told the flywheel was ok with no spots or any signs of friction or heat damage. The clutch was in decent shape as it only had 57,000km but I had it replaced just to start of fresh. I wont be getting my car back until next week as apparently after the third gear rebuild the car will not shift into reverse as the synchro is shot?? I was told by the tech that this sometimes occurs during a rebuild. Did the tech screw up and damage this synchro during the disassembly process or reassembly process? Anyone else see this type of issue? Even after all of this...I cant wait to get my bum back into that sweet two tone leather seat!!
#14
Registered Member
#15
I figured as much, just hoping to find a way to get out of paying $1200-$1500 for a clutch replacement, if it comes to that.
#16
Cruisin'
The Acura dealership my car is at, Lougheed Acura quoted me $450 for the clutch and $850 for the flywheel. I believe that is just for parts and doesnt include labour. I got lucky and only had to replace the clutch and not the flywheel. I am currently waiting for a new reverse gear synchro to show up...on critical backorder.
#18
Good to know. Now I'd only have to find a local mechanic that I trust who will do a clutch replacement....all assuming I need one.
#19
I just bought my car CPO about a month ago. My clutch shudders when I don't rev-match. I need the 3rd gear TSB done so I'll have them take a look at it.
My question...isn't this something that should have been noticed during certification? I realize they could have easily overlooked it, heck, the probably didn't even drive it. They replace other wear items at this time so wouldn't the clutch fall under that as well?
My question...isn't this something that should have been noticed during certification? I realize they could have easily overlooked it, heck, the probably didn't even drive it. They replace other wear items at this time so wouldn't the clutch fall under that as well?
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