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Question for Those With PDK

 
Old 06-04-2016, 11:50 PM
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BlackBeauty
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I'm new to PDK and am going through the break-in of my .2. I'm noticing when the car slows and shirts to first gear before I stop that I can hear the clutch plate engaging with a mechanical bolt sound. I understand dual clutches from 2nd to 1st gear are not always the smoothest. Is this normal?
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Old 06-05-2016, 12:09 AM
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NoGaBiker
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I only drive mine in manual mode, but the 2-1 downshift is rough and loud, with a mechanical thunk of engagement, compared to the other downshifts. Don't know if it's the same in auto or not, but I would assume so.
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Old 06-05-2016, 04:02 AM
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It's normal.
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Old 06-05-2016, 06:39 AM
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Thanks everyone - I really appreciate it!
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Old 06-05-2016, 07:13 AM
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OK, so now I'm thinking my experience is abnormal because I have not experienced the behaviour described; driving in manual mode too. No baulking sounds.

Does it depend perhaps on the level of revs going down?
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Old 06-05-2016, 09:25 AM
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JimHJr
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I gotta say that I don't think I've ever heard any mechanical sounds when downshifting into first either. It's definitely not what I'd call smooth though when the revs are up.

When in manual I let the car in 2nd when pulling up to stoplights most of the time and the car will still shift into first when barely moving (low revs). Much smoother. Anyone else do this or something similar?
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Old 06-05-2016, 09:56 AM
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My PDK downshifts from 2nd to 1st in auto mode are smooth. When in manual mode/Sport or Sport Plus, if I downshift from 2nd to first at 2,000rpm or higher, it's different. More abrupt, a bit rougher and noisier due to the rev-match (I have sport chrono).

I asked the Porsche Tech about this couple times during regular service, as I too was a new Porsche/PDK owner and worried about it. He said it's normal. He mentioned that PDK has to move the gears from 3rd to 1st, which is why it's noisier.

Others on this forum will know much more than I about PDK details, but from what you describe, it sounds normal.

Last edited by Ice9ine; 06-07-2016 at 05:37 PM.
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Old 06-05-2016, 10:21 AM
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I have no mechanical "bolt sound" from second to first gear downshifts on a .1 PDK. Other than the higher rev sound, it is smooth. No other mechanical sounds.
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Old 06-05-2016, 10:23 AM
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Originally Posted by STG View Post
I have no mechanical "bolt sound" from second to first gear downshifts on a .1 PDK. Other than the higher rev sound, it is smooth. No other mechanical sounds.
+1
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Old 06-05-2016, 05:55 PM
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BlackBeauty
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It definitely is a mechanical sound of the gear engaging, not a thudding or shudder, rather it's just hearing the clutch engage- like metal in metal engagement, not a grinding sound.

I'll be doing an oil change at 2k so bringing it in soon but I know they'll tell me it's normal.
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Old 06-05-2016, 08:04 PM
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Austin-Guy
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Originally Posted by STG View Post
I have no mechanical "bolt sound" from second to first gear downshifts on a .1 PDK. Other than the higher rev sound, it is smooth. No other mechanical sounds.
+1 Just took mine out, tried both auto and manual for at least 20 miles each with hills and turn (a lot of shifting). Smooth every time from 2nd to 1st.
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Old 06-07-2016, 03:19 PM
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I don't like the 2--1 clunk sound, so when slowing to a stoplight in manual mode, I blip both paddles to hit neutral then at a complete stop shift into 1st. Sure the clunk may not hurt anything but it sounds harmful, if that makes sense.
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Old 06-07-2016, 05:07 PM
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Originally Posted by JimHJr View Post
I gotta say that I don't think I've ever heard any mechanical sounds when downshifting into first either. It's definitely not what I'd call smooth though when the revs are up.

When in manual I let the car in 2nd when pulling up to stoplights most of the time and the car will still shift into first when barely moving (low revs). Much smoother. Anyone else do this or something similar?
That's what I do when in manual mode. I don't think I have ever downshifted into first manually. I know the 2nd to 1st downshifts in a regular manual are rather difficult as far as the amount of force required, so I just figured I would let the PDK shift into 1st for me. As you said, the car is almost to a stop before it shifts into first. If I am rolling along at less than 5 mph and still in 2nd, I have never felt like I needed 1st to get the car moving again quickly, and without lugging the engine. I have no mechanical sound at all when I let the PDK automatically shift into 1st, whether I am in manual mode or auto.
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Old 06-08-2016, 11:37 AM
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BlackBeauty
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So I heard back from my SA- "sound is perfectly normal."
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Old 11-18-2018, 05:40 PM
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Default 991 pdk second to first soft mechanical noise

Originally Posted by BlackBeauty View Post
So I heard back from my SA- "sound is perfectly normal."
Hi, I have noticed the same at 4000 km.... Seems some people don't note this.. . And it's been variable for me.... I see you had it confirmed as being normal, but I wonder why it's not noticed by many?
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