yeahforbes
Go Kart Newbie
- Location
- NJ
- Car(s)
- 2017 Golf R DSG
What can cause NVH in the form of massive drone in the cabin, but not much if any noise outside, when getting on the throttle while my DSG6 is in reverse? The way the sound grows with torque is almost like how lugging sounds, except huge, and it doesn't trail off into bliss as RPMs increase. It's gotten to the point where even neutral (factory idle speed) causes a little bit too unless I give it light throttle.
60k mi
No DTCs
Quick research suggested engine/transmission mounts, so when I happened to be in the shop for other things (DSG service and Haldex service), I asked about it. Sure enough, pry test failed with flying colors on the transmission side, recommend do both. So I replaced both with Corteco figuring they would be OEM quality. I did the engine mount (under the coolant bottle) one day and the transmission mount (under the battery) the next day -- what a bitch that was, but I digress. When I drove a little bit in between doing each, it was already a lot better (despite swapping the one that wasn't allegedly the culprit), and after doing both it was noticeably better yet. Maybe it was even perfect for a bit, but it's hard to know because the problem was always a little bit intermittent anyway, maybe having gotten to 60% of the time.
But after several drive cycles, suddenly the problem was back. Not long after, it had snuck up to occurring 100% of the time. But I don't daily it, so it hasn't been all that many miles. How should I diagnose further? Could the dogbone / pendulum bushing also have gone out? Is that a thing, and if so, seems odd that the shop didn't mention it whatsoever, considering they specifically recommended doing the 2 mounts even if only one is known bad. Or am I off base? I've done a solid number of things on a car, but I'm new to this particular area of expertise.
A quick sharp rumble when starting the engine also seems to have started when this all started, gone away after replacing the mounts, and come back on exactly the same timeline as the reverse vibration.
In case its relevant: I probably engine brake too much, like some red light situations that involve no realistic worries about brake fade anyway. I'm cutting out the habit, but I built it up based on "the DSG is a beast, all good" type of consensus in the debate about possible risks. I seriously wouldn't be surprised to hear this is related, but again, no expert. But I'm conservative with launches -- that's legitimately on rare occasions -- got 93oct Stg 1 EQT sauce though, ECU+TCU. Thanks in advance.
EDIT: Based on Charles saying "if you've never replaced one of these bushings, it's not fun" I guess I should hope it's not that... maybe I just got faulty Corteco mounts?
60k mi
No DTCs
Quick research suggested engine/transmission mounts, so when I happened to be in the shop for other things (DSG service and Haldex service), I asked about it. Sure enough, pry test failed with flying colors on the transmission side, recommend do both. So I replaced both with Corteco figuring they would be OEM quality. I did the engine mount (under the coolant bottle) one day and the transmission mount (under the battery) the next day -- what a bitch that was, but I digress. When I drove a little bit in between doing each, it was already a lot better (despite swapping the one that wasn't allegedly the culprit), and after doing both it was noticeably better yet. Maybe it was even perfect for a bit, but it's hard to know because the problem was always a little bit intermittent anyway, maybe having gotten to 60% of the time.
But after several drive cycles, suddenly the problem was back. Not long after, it had snuck up to occurring 100% of the time. But I don't daily it, so it hasn't been all that many miles. How should I diagnose further? Could the dogbone / pendulum bushing also have gone out? Is that a thing, and if so, seems odd that the shop didn't mention it whatsoever, considering they specifically recommended doing the 2 mounts even if only one is known bad. Or am I off base? I've done a solid number of things on a car, but I'm new to this particular area of expertise.
A quick sharp rumble when starting the engine also seems to have started when this all started, gone away after replacing the mounts, and come back on exactly the same timeline as the reverse vibration.
In case its relevant: I probably engine brake too much, like some red light situations that involve no realistic worries about brake fade anyway. I'm cutting out the habit, but I built it up based on "the DSG is a beast, all good" type of consensus in the debate about possible risks. I seriously wouldn't be surprised to hear this is related, but again, no expert. But I'm conservative with launches -- that's legitimately on rare occasions -- got 93oct Stg 1 EQT sauce though, ECU+TCU. Thanks in advance.
EDIT: Based on Charles saying "if you've never replaced one of these bushings, it's not fun" I guess I should hope it's not that... maybe I just got faulty Corteco mounts?
Last edited:
