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2013 Cadillac ats 2.0T auto rpm spike and jerk


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Probee773
Novice

Feb 17, 2016, 7:04 PM

Post #1 of 13 (4223 views)
  post locked   2013 Cadillac ats 2.0T auto rpm spike and jerk  

I posted this video on youtube. If I'm coasting between 20 and 40 mph, and I gently push down on the gas to accelerate, the rpms spike and I feel a jerk. It happens in auto or manual mode, and I tested it in manual mode to make sure the car stayed in one gear to eliminate a shifting issue. Anyone else experience this? What could be causing this? Transmission issues? Torque converter issues?

https://youtu.be/fi1OXKF9qTw


gsferraro
Veteran

Feb 18, 2016, 6:59 AM

Post #2 of 13 (4199 views)
  post locked   Re: 2013 Cadillac ats 2.0T auto rpm spike and jerk  

First thing to do is check your fluid level, are there any trouble codes present.


Probee773
Novice

Feb 18, 2016, 7:39 AM

Post #3 of 13 (4195 views)
  post locked   Re: 2013 Cadillac ats 2.0T auto rpm spike and jerk  

I checked the owners manual, and there is no dipstick to check the fluid level. :( Could it be a slipping torque converter? It feels like the engine revs freely for a couple hundred rpms (only lasts about a second or two) and then the transmission engages which causes the jerking sensation. The dealer said it was transmission lash, but that seems like way too much lash.


[URL=http://www.use.com/FvTyj]
[URL=http://www.use.com/FvTyj]




Probee773
Novice

Feb 18, 2016, 7:39 AM

Post #4 of 13 (4193 views)
  post locked   Re: 2013 Cadillac ats 2.0T auto rpm spike and jerk  

...and no trouble codes unfortunately.


gsferraro
Veteran

Feb 18, 2016, 9:34 AM

Post #5 of 13 (4186 views)
  post locked   Re: 2013 Cadillac ats 2.0T auto rpm spike and jerk  

Correct, this has to up on a lift to get checked, Question, if you drive this normally and let it shift up to 6th, do you feel anything? or is it only when coasting and then you accelerate again


Probee773
Novice

Feb 18, 2016, 10:14 AM

Post #6 of 13 (4181 views)
  post locked   Re: 2013 Cadillac ats 2.0T auto rpm spike and jerk  

If I accelerate from 0 to 70 normally (or quickly), it shifts fine and I don't feel anything. It's only when I'm coasting from around 20 to 40 mph and begin accelerating again (driving in traffic, etc...). The interesting thing is, it is only noticeable when accelerating gently or normally. If I accelerate quickly, it downshifts and seems okay (I expect a slight jerk with the downshift).


gsferraro
Veteran

Feb 18, 2016, 11:03 AM

Post #7 of 13 (4174 views)
  post locked   Re: 2013 Cadillac ats 2.0T auto rpm spike and jerk  

What about when the car is hot? drives same way


Probee773
Novice

Feb 18, 2016, 11:06 AM

Post #8 of 13 (4171 views)
  post locked   Re: 2013 Cadillac ats 2.0T auto rpm spike and jerk  

Yes, does it cold or hot.


gsferraro
Veteran

Feb 18, 2016, 4:37 PM

Post #9 of 13 (4159 views)
  post locked   Re: 2013 Cadillac ats 2.0T auto rpm spike and jerk  

Well, everything seems to be working the way it should, i would still have the fluid level checked. How many miles on your car? The only thing i can really think of is when you go for kick down, the computer is going to increase line pressure to hold the clutch on, that could be the jolt that your feeling.


Probee773
Novice

Feb 19, 2016, 8:41 AM

Post #10 of 13 (4136 views)
  post locked   Re: 2013 Cadillac ats 2.0T auto rpm spike and jerk  

I made an appointment with a highly rated dealer in the area. Hoping for a solenoid issue. I'll keep you guys posted.


Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Feb 19, 2016, 9:50 AM

Post #11 of 13 (4132 views)
  post locked   Re: 2013 Cadillac ats 2.0T auto rpm spike and jerk  

? Are you sure you are off warranty on this vehicle? Drivetrains can be longer that bumper to bumper and worth a check,
T



Probee773
Novice

Mar 7, 2016, 1:23 PM

Post #12 of 13 (4055 views)
  post locked   Re: 2013 Cadillac ats 2.0T auto rpm spike and jerk  

Fixed under warranty. Turns out the transmission control module had some settings that were off, so they reflashed it back to the factory settings, and we are all good now. Cool


Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Mar 7, 2016, 2:23 PM

Post #13 of 13 (4045 views)
  post locked   Re: 2013 Cadillac ats 2.0T auto rpm spike and jerk  

Good news! I'll close this out as solved to keep spammer out and YOU can re-open just ask any moderator if you wish.


Solved,


T







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