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V8 and V6 Transmissions / Driveline (6L80 / 6L50 / TR6060 / AY6) Driveshafts | Differentials | Gears | Rearends | Clutch | Shifters

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Old 02-02-2012, 07:56 PM   #1
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Exclamation Notchy/Rough Shifting? 2012 SS LS3

Please help. I dont get why my LS3 is shifting so roughly. Gears are hard to get in and out of, it is never a smooth transition even if I keep the clutch all the way in. Car has about 650 Miles, I asked dealer and they said it was the break in period..I have had plenty of sticks in the past and none shift this poorly..Anyone else? Please help.....:(

Oh and if it matters, it does have the Hurst STS

Last edited by Birm; 02-02-2012 at 07:57 PM. Reason: addition
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Old 02-02-2012, 08:02 PM   #2
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I've noticed this is a tough car to constantly get perfect shifts in. I've gotten used to it, I'm at 5000 miles and it still happens.

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Old 02-02-2012, 08:05 PM   #3
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Does it feel like its rough to get in and out of gear though? Almost as if the clutch doesn't disengage all the way?

I did the test where you push the clutch all the way in and give it gas to see if it moves (in 1st) and it didnt but I swear it feels as if its sticking...
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Old 02-02-2012, 08:30 PM   #4
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The cause of the problem: the stock clutch master cylinder simply doesn't flow enough fluid to push the clutch slave cylinder far enough to fully disengage the clutch. This produces extreme heat inside the bellhousing, boiling the fluid inside the hydraulic system (thus introducing air) and causing a faded (or totally dead) clutch pedal. Other side effects include difficulty shifting at high RPMs, difficulty engaging 1st and Reverse while stopped, shortened clutch life and shortened transmission life. We've been seeing this exact issue for years in many applications.
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Old 02-02-2012, 08:32 PM   #5
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So...how do I fix? Royal Purple? Amsoil? Or just wait till it goes out and get a new one? (please say not the latter lol)
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Old 02-02-2012, 08:33 PM   #6
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Quote:
Originally Posted by kaylew78 View Post
The cause of the problem: the stock clutch master cylinder simply doesn't flow enough fluid to push the clutch slave cylinder far enough to fully disengage the clutch. This produces extreme heat inside the bellhousing, boiling the fluid inside the hydraulic system (thus introducing air) and causing a faded (or totally dead) clutch pedal. Other side effects include difficulty shifting at high RPMs, difficulty engaging 1st and Reverse while stopped, shortened clutch life and shortened transmission life. We've been seeing this exact issue for years in many applications.

Old LS1 F-bodies had a similar problem to this. We would drill out the hydraulic lines a bit for better flow. Worked everytime.
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Old 02-02-2012, 08:36 PM   #7
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Old LS1 F-bodies had a similar problem to this. We would drill out the hydraulic lines a bit for better flow. Worked everytime.
Is that something any experienced Wrench can do or do I need a performance shop? RX is about 30mins if needed if this is the fix...it drives me nuts!
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Old 02-02-2012, 08:39 PM   #8
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I have a 2011 LS3 with Hurst STS that I bought in May. Never had this problem. I'd take it to the dealer and have them drive it. I do see you're pretty well-modded. Hope the dealer doesn't give you a hard time.
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Old 02-02-2012, 08:46 PM   #9
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The cause of the problem: the stock clutch master cylinder simply doesn't flow enough fluid to push the clutch slave cylinder far enough to fully disengage the clutch. This produces extreme heat inside the bellhousing, boiling the fluid inside the hydraulic system (thus introducing air) and causing a faded (or totally dead) clutch pedal. Other side effects include difficulty shifting at high RPMs, difficulty engaging 1st and Reverse while stopped, shortened clutch life and shortened transmission life. We've been seeing this exact issue for years in many applications.
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Old 02-02-2012, 08:53 PM   #10
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Mine is the same. Has gotten better as I put more miles on it. Don't think it is a real problem. nice thing is you dont have to worry about it dropping out of gear. Once you slam it in, it's there to stay.
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Old 02-02-2012, 08:57 PM   #11
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I have a 2011 LS3 with Hurst STS that I bought in May. Never had this problem. I'd take it to the dealer and have them drive it. I do see you're pretty well-modded. Hope the dealer doesn't give you a hard time.
Thanks, yea but ionlydid mods that didn't require tune to keep warranty. I'm gonna give em a call.
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Old 02-02-2012, 08:57 PM   #12
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Mine is the same. Has gotten better as I put more miles on it. Don't think it is a real problem. nice thing is you dont have to worry about it dropping out of gear. Once you slam it in, it's there to stay.
Lol a little reassurance is always nice
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Old 02-02-2012, 09:54 PM   #13
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Dont want to rain on your parade, but my 12 with the H STS shifts better than any car I ever shifted. I had 2 4th Gens and they sucked big time. My Hyundai doesnt shift like this car. I have 800 miles and no mods, but its been this way since I picked it up with 12 miles on it. I hope that it does go away, but it sucks that its still prevalent in the 12s. Good Luck.
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Old 02-03-2012, 05:30 AM   #14
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Ttt
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