11 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHHelp - Grinding Rumbling Noise Tiptronic
Reported or suspected cause
same problem as i diagnosed
Reported cause
No successful repair reported for this finding.
1
Identified cause
0
Suspected cause
0
Reported fixes
Read evidence and context
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Discussions that report identifying a cause
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Leading evidence: 'same problem as i diagnosed' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is 'same problem as i diagnosed' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Repair will fix' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
Source reports, not a diagnosis or a success probability. Counts refer to discussions and can overlap.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that performed work without a confirmed outcome
1
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Performed · outcome unconfirmed · Original poster
I had the transmission mount replaced and wow...what a difference!
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that performed work without a confirmed outcome
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Discussions that contain suggestions
1
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Performed · outcome unconfirmed · Original poster
I had the wheel bearing replaced as my indy said it was a classic wheel bearing noise.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that suspect a cause
1
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Suspected cause
If there is no noise when traveling in a straight line and it only occurs when turning, that would be my guess that it would be a wheel bearing or much less likely a drive shaft.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suspected cause
If there is no noise when traveling in a straight line and it only occurs when turning, that would be my guess that it would be a wheel bearing or much less likely a drive shaft.
Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.
11 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.
1 acknowledgements have no verified action link; they do not establish a repair result.
Outcome without a verified action link
At the track I had on track tires and wheels and at home my daily street tires/wheels were put back on, that made no difference.
At a DE last weekend my 03 996 develped a grinding/rumbling noise from the right rear when making a sweeping acelerating left turn which puts a lateral load on the car. I had the wheel bearing replaced as my indy said it was a classic wheel bearing noise. Unfortunately that was not the problem and it is still there. I'm now concerned it may be from the Tiptronic. Has anyone else experienced this symptom and found out what caused it? At the track I had on track tires and wheels and at home my daily street tires/wheels were put back on, that made no difference. I changed the brake pads, no change. There is nothing visibly rubbing. Help would be greatly appreciated.
Many times the actual location of the noise may not be where you think it is. It may be the front wheel bearing. If there is no noise when traveling in a straight line and it only occurs when turning, that would be my guess that it would be a wheel bearing or much less likely a drive shaft.
Of course the info you have provided is very limited and any diagnosis is really just a crap shoot. A good mechanic would be able to discern these noises, I would think.
Interesting. Can you explain a little more on this? I'm trying to picture where a bad mount(s) could cause the sound, perhaps a mis-alignment somehwere with the lateral forces of the turn? How much did it cost you to fix it?
Took my car over to my indy yesterday and he put it up on the lift. Sure enough the bushings on both sides of the transmission mount were broken and broken pretty bad. I'll take it back to him Friday and he will install a new one. Cost of the mount is $258. He thinks 1-2 hours labor. Looks like an easy enough job I could do myself but just do not have the time over the next week. You can't just replace the bushings in the mount, the entire mount needs to be changed out but it would probably be a wash price wise. Labor to press out the old and press in new bushings vs. just paying for a whole new carrier mount. I've also noticed since this started a clunk as the car downshifts from 3-2. Hopefully this repair will fix that as well. I'll post a progress report after the repair.
Do you know the part number, or have a link, to the new mount? I also need a new mount and my indy quoted a much higher price. Said something similar about pressing out the old bushings is not the way to go due to vibrations. But the new mount was quoted at $1200 plus 8 hrs labor!
Pelican Parts has it for $251.50 with probably free shipping. 997-375-033-03-M100
http://www.pelicanparts.com/cgi-bin/...2529%2520%2520
Here are some posts about the mount I was able to find. I found them very helpfull.
http://www.renntrack.com/forums/show...t=transmission
https://rennlist.com/forums/996-gt2-...ier-mount.html
I had the transmission mount replaced and wow...what a difference! No more grinding and the whole undercarriage feels solid as a rock now. It took my guy about 1/2 hour to make the change. This is actually a very simple job if you find you need to do it yourself. The hardest part will be jacking up the car and supporting the transmission. There are only four bolts that hold on the carriage plus the two that mount it to the transmission. They were all easily accessable. If you have the plastic cover over everything that may add a few minutes to remove that first, mine is long gone.
The new 997 part number mount has much beefier bushings which should last much longer. Here are some pictures from the broken one. All four bushings were completely broken.
https://www.dropbox.com/s/p1z7mim2n6jaiho/IMAG1266.jpg
https://www.dropbox.com/s/ni0yvol8eotg82r/IMAG1267.jpg
https://www.dropbox.com/s/43o46oq1f9ts7f2/IMAG1268.jpg
https://www.dropbox.com/s/95x7lxh7vfprjeq/IMAG1269.jpg
Glad it was the same problem as I diagnosed! But frankly you should complain to your indy that replaced the wheel bearing. My dealer diagnosed it correctly within 10 seconds of me describing the problem.
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