I had that noise just before i threw a U-Joint. Mark On Thursday, December 11, 2003, at 12:53 PM, Farrar Hudkins wrote: > Bill: > > > Humming sounds like drive train, not valve train. > > I agree. Makes me nervous. > > > If oil not lubricating, valve train should clatter and bang, not hum. > > Never had that in this truck, fortunately. > > > (Note: could be stopped up oil passages rather than watery oil). > > > > I'd check wheel bearings, U joints, differential, and transmission. > > Could also simply be tires -- all season and off road treads > > significantly noisier than touring tread. > > I did get new tires recently, but the humming follows RPMs precisely > regardless of gear. I can sometimes feel the humming through the > steering wheel at idle because of the low frequency. To make a dorky > music analogy, the humming is in the Tenor range. :\ > > Perhaps I should describe it as a whirring noise instead of a hum. It > goes "errrrrrrrrrrrrrrrrrrrrrr" like a blonde girl trying to decide > between Bud Light and Michelob Light while being stared down by a > spiky-haired waiter named Jim. In neutral or park, when the accelerator > pedal is depressed, the whirring gets higher-pitched, and when I let > off > the pedal, the pitch drops. When in forward or reverse, same happens, > plus it holds steady while the car is at speed, unless I have to go up > a > hill, in which case the pitch goes up as the revs go up, or when I'm > coasting, in which case the pitch goes down as the revs go down. > > Hang on, I have a thought ... do they still use harmonic balancers in > vehicles? > > > Re: light weight oil -- SAE 30 generally recommended by manufacturers > > down to 32 degrees. That pretty much covers all of us southerners. > > IMHO no real problem for few nights it drops into 20's. > > 10W-30 is what it says on that little sticker just in front of the > engine. Hm. > > > FWIW: racing crowd generally runs single viscosity 40 and 50 weights. > > But their engines operating in totally different environment. > > True. I feed my truck 89 octane fuel anyhow. Runs like a rickshaw on > crack if I give it anything higher or lower octane. > > > Do you change own oil? Need to, especially on a (full size) truck. > > Don't even jack up. Can change mine less than 20 minutes. Motorcraft > > FL1 filter costs less than even a house brand. City recycles old oil > > back in bottles to burn in garage furnace (curbside pickup). Only > > procedure easier to perform is filling gas tank (but costs nearly 4 > > times as much!). > > I do, but the trick is to remember to back into the space. Our parking > is "off-street" but that really means "perpendicular to street, facing > sidewalk." And after a few oil changes, I have to buy a new shirt. :P > > Bill, it'd be nice to troubleshoot this off-list so the moderators > don't > kick ... oh, wait. Never mind. :) > > Thanks, > Farrar > > <image.tiff> > > > To unsubscribe from this group, send an email to: > DMCForum-unsubscribe@xxxxxxxxxxxxxxx > > > > Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. Come see all of my Photo's at my Website. http://photos.yahoo.com/snextime [Non-text portions of this message have been removed] Yahoo! Groups Sponsor ADVERTISEMENT <http://rd.yahoo.com/SIG=12cu233fv/M=267637.4116732.5333197.1261774/D=egro upweb/S=1705126215:HM/EXP=1071275956/A=1853619/R=0/*http://www.netflix.com /Default?mqso=60178356&partid=4116732> click here <http://us.adserver.yahoo.com/l?M=267637.4116732.5333197.1261774/D=egroupm ail/S=:HM/A=1853619/rand=710744456> To unsubscribe from this group, send an email to: DMCForum-unsubscribe@xxxxxxxxxxxxxxx Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service <http://docs.yahoo.com/info/terms/> .
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