trabbic Posted February 15, 2007 Share Posted February 15, 2007 No offense, trabbic... but where? No offense taken, mccorry... It just seems to me like we are going in circles (or beating a dead horse). People keep repeating the same thing over and over again. Or not reading the whole thread, and asking questions that have already been answered several times. (my biggest pet peeve on forums ) I think we pretty much have this thing narrowed down. It will be hard or impossible to get more specific than we have without more evidence, or trial and error. I REALLY like the camera idea, it will help us to maybe prove (without actually replacing bushings) what is causing it. My vB Garage How to Install Steering Wheel Radio Controls Cubby Gauge Mounting Solutions Link to comment Share on other sites More sharing options...
G.T.Subie Posted February 15, 2007 Share Posted February 15, 2007 For what it's worth I just got my car back from having transmission work done unrealated to this and they checked evrything and didn't find anything wrong with the rear diff on my car either. Denial is your best friend Link to comment Share on other sites More sharing options...
whitetiger Posted February 15, 2007 Share Posted February 15, 2007 did you get that trans work waranteed? Link to comment Share on other sites More sharing options...
G.T.Subie Posted February 15, 2007 Share Posted February 15, 2007 Yes Sir!!! http://www.legacygt.com/forums/showthread.php?t=54215 Denial is your best friend Link to comment Share on other sites More sharing options...
whitetiger Posted February 15, 2007 Share Posted February 15, 2007 noice!!! Link to comment Share on other sites More sharing options...
Effin Ponderous Posted February 15, 2007 Share Posted February 15, 2007 hell, for all we know the U-joints are rubin on the floor pan:lol: Link to comment Share on other sites More sharing options...
HansGT Posted February 16, 2007 Share Posted February 16, 2007 Sir Keefe, Lord of suspension and tires will be checking out my growling noise tomorrow. Let you know if we find anything concrete. Link to comment Share on other sites More sharing options...
mccorry Posted February 16, 2007 Author Share Posted February 16, 2007 Sir Keefe' date=' Lord of suspension and tires will be checking out my growling noise tomorrow. Let you know if we find anything concrete.[/quote'] Nice! I'll be waiting patiently! Link to comment Share on other sites More sharing options...
HansGT Posted February 19, 2007 Share Posted February 19, 2007 Keefe may chime in here today....but he thinks it has to do with the engine pulling timing....common issue for most. (currently TDC st.2 93, had same issue with Cobb 1.15 st.2 93) He could feel the vibration in the floor board while in the passenger seat. The noise in the rear could be just the side effect of the engine pulling timing...causing the vibration. We found no suspension issues, car handles fine, no odd noises. No drive train issues either. After about 15-20 minutes the noise became harder and harder to reproduce and eventually we couldn't get it to do it at all. Next step...data log. BTW...drove Keefes car:icon_mrgr Thing sounds mean with that single straight pipe. Handles great! Link to comment Share on other sites More sharing options...
trabbic Posted February 19, 2007 Share Posted February 19, 2007 Keefe may chime in here today....but he thinks it has to do with the engine pulling timing....common issue for most. (currently TDC st.2 93, had same issue with Cobb 1.15 st.2 93) He could feel the vibration in the floor board while in the passenger seat. The noise in the rear could be just the side effect of the engine pulling timing...causing the vibration. We found no suspension issues, car handles fine, no odd noises. No drive train issues either. After about 15-20 minutes the noise became harder and harder to reproduce and eventually we couldn't get it to do it at all. Next step...data log. BTW...drove Keefes car:icon_mrgr Thing sounds mean with that single straight pipe. Handles great! I don't think it is from pulled timing. I have logged runs where I am no where near pulling timing (so has Casopolis), and we both had the growling still (TDC tunes). My car has NEVER pulled timing in the low rpms, where I get this growling, the only pulled timing I have ever recorded was @ high rpms. And the only logs I have recorded with pulled timing were Cobb's maps; with my TDC maps (and 94 octane ) I don't' get pulled timing. Also I am curious how pulled timing would vibrate a floor board. Please log, I doubt you will find any correlation. My vB Garage How to Install Steering Wheel Radio Controls Cubby Gauge Mounting Solutions Link to comment Share on other sites More sharing options...
mccorry Posted February 19, 2007 Author Share Posted February 19, 2007 It isn't in ANY WAY the engine pulling timing. Sorry... I'm just not buying it. I have worked on cars most of my life and I can tell you that this isn't an engine issue. It is a driveline issue. This a harmonic vibration that is being passed into the car from the driveline... due to cold HARD bushings. When the bushings get cold, they are less compressible and less flexible. Our cars are probably squatting under hard acceleration and that is compounding this issue. Link to comment Share on other sites More sharing options...
LittleBlueGT Posted February 19, 2007 Share Posted February 19, 2007 It isn't in ANY WAY the engine pulling timing. Sorry... I'm just not buying it. I have worked on cars most of my life and I can tell you that this isn't an engine issue. It is a driveline issue. This a harmonic vibration that is being passed into the car from the driveline... due to cold HARD bushings. When the bushings get cold, they are less compressible and less flexible. Our cars are probably squatting under hard acceleration and that is compounding this issue. +400 It is a mechanical issue of some sort, NOT PULLED TIMING! As far as the car squating, I just thought of something: Have you ever seen pictures of thr OEM suspension squat under a hard launch, I think it squats more then my car does, even though mine is lowered. Full tune of 68HTA, KSTech 73 MAF, Racer X FMIC and ID1000s................by the DataLog Mafia!!! Link to comment Share on other sites More sharing options...
HansGT Posted February 19, 2007 Share Posted February 19, 2007 Don't shoot the messanger. Link to comment Share on other sites More sharing options...
mccorry Posted February 19, 2007 Author Share Posted February 19, 2007 I'm not.... sorry if it seemed that way. Link to comment Share on other sites More sharing options...
HansGT Posted February 19, 2007 Share Posted February 19, 2007 It's cool. Keefe seemed pretty convincing to me. But I see where bushings could very well be the most likely. Link to comment Share on other sites More sharing options...
rony Posted February 20, 2007 Share Posted February 20, 2007 I was on a stock map for a while, Fan TSB, and I still had the noise. Plus, there is at least one other person that claims this happening on a stock 05. Bushings seems to be the most logical thing at the moment. My Car vBGarage Link to comment Share on other sites More sharing options...
TRS Posted February 20, 2007 Share Posted February 20, 2007 This a harmonic vibration that is being passed into the car from the driveline... due to cold HARD bushings. When the bushings get cold, they are less compressible and less flexible.So we don't really want somebody to come out with a stiffer polyurethane bushing then. Otherwise it would happen when it's warm out too. Link to comment Share on other sites More sharing options...
LittleBlueGT Posted February 20, 2007 Share Posted February 20, 2007 So we don't really want somebody to come out with a stiffer polyurethane bushing then. Otherwise it would happen when it's warm out too. I don't think so. When I am driving the car in real cold weather the noise sounds like it is metal vibrating against metal. I can stop it and start it when I want by the throttle. I believe some clearance on two metal pieces gets smaller when it is colder thus allowing the contact. I do not believe it is a harmonic vibration! Full tune of 68HTA, KSTech 73 MAF, Racer X FMIC and ID1000s................by the DataLog Mafia!!! Link to comment Share on other sites More sharing options...
mccorry Posted February 20, 2007 Author Share Posted February 20, 2007 OK.. maybe not harmonic vibration... but it is vibration. It is being transfered into the cabin via the bushings or a metal/metal contact point.... maybe the bumpstops. Link to comment Share on other sites More sharing options...
LittleBlueGT Posted February 21, 2007 Share Posted February 21, 2007 OK.. maybe not harmonic vibration... but it is vibration. It is being transfered into the cabin via the bushings or a metal/metal contact point.... maybe the bumpstops. Metal on metal contact or some conatct that is a hard material on a hard material. Full tune of 68HTA, KSTech 73 MAF, Racer X FMIC and ID1000s................by the DataLog Mafia!!! Link to comment Share on other sites More sharing options...
TravisS Posted February 21, 2007 Share Posted February 21, 2007 Just got this again MUCH worse that I had before yesterday. Going around a fairly tight right hand turn, floored it after the apex and it really did sound like something smacking against the underneath of the car. In the past all I had heard was a mild growl, noticeable, but not bad. This time it sounded like I was ripping my car apart Tried again on a similar left hand turn, nothing. Link to comment Share on other sites More sharing options...
moviemadness Posted February 22, 2007 Share Posted February 22, 2007 how many of you are cobb stage one, and how many of you are TDC stage one? cuz.. I noticed it more on Cobb stage 1, and not as much on TDC stage 1.. hmm...less power? Link to comment Share on other sites More sharing options...
bluechipbmw Posted February 22, 2007 Share Posted February 22, 2007 I think a good idea might be to create a poll for people who are experiencing this problem: YES or NO Stock 5EAT Stock Manual Stage 1 (Cobb) 5EAT Stage 1 (TDC) Manual Stage 2 (Cobb) Stock 5EAT Stage 2 (TDC) Stock Manual Link to comment Share on other sites More sharing options...
Vimy101 Posted February 22, 2007 Share Posted February 22, 2007 ^ You might add suspension mods. Link to comment Share on other sites More sharing options...
HansGT Posted February 22, 2007 Share Posted February 22, 2007 Guys after you drive 20-25 minutes or so, does it go away for you? It's completely gone for me by that then. Link to comment Share on other sites More sharing options...
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