With my hardtop on, I get a booming/howling noise from about 2800 to 3000 rpm. This is true even when revving the engine in neutral, so I know it's not the driveshaft.
If I open the bonnet and listen and feel the engine when revving it, nothing seems wrong. I guess it's just the entire body cavity resonating. I have checked my engine mounts, exhaust mounts, etc. and they all seem fine. You should try the revving-in-neutral test to see if it is the drivetrain. Also accelerate to a high speed on the freeway, put it in neutral, kill the engine, and coast down to a reasonably slow speed. If you have a driveshaft problem it will be obvious (the usual 50mph howl). Doug Braun '72 Spit At 03:45 PM 3/2/2006 -0500, [EMAIL PROTECTED] wrote: >Hello folks, > >Our 1980 Spitfire is making a noise/vibration that seems to be speed-based. I >can't say at what exact speed as the speedo has decided to take a little time >off, but it occurs at 3000-4000 rpm in 4th. It is really a vibration, but you >hear it moreso than feel it. It's probably been there for a while, but with >the hardtop on, I can hear it better. > >The noise is like a loud, very low hum, sort of like feedback from a >sub-woofer, loud enough to make conversation difficult. I suspect the >driveshaft, >(which I replaced with a used unit a while back, previous unit had a serious >vibration @ 50mph) but before I pull it and replace it (again), I wonder if >anyone >else has encountered such a problem and solved it somehow. Your messages not reaching the list? Check out http://www.team.net/posting.html === This list supported in part by The Vintage Triumph Register === http://www.vtr.org === Help keep Team.Net on the air === http://www.team.net/donate.html === unsubscribe/change address requests to [EMAIL PROTECTED] or try === http://www.team.net/cgi-bin/majorcool === Other lists available at === http://www.team.net/mailman/listinfo === Archives at http://www.team.net/archive === http://www.team.net/the-local === Edit your replies!
