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Thu Jul 24, 2008 12:10 pm

ok, got a new one... it comes and goes, sometimes loud sometimes not... it sounds as if something is rubbing a tire, like a wheel on kind of wobbly or something, scraping part of the time in its revolution. like, rub......rub.......rub......rub...... does that make sense? frequency increases with speed... but, heres the kicker- push in the clutch and it goes away.

:shock:

what could this be?

Thu Jul 24, 2008 12:15 pm

Throwout bearing or clutch related?

Thu Jul 24, 2008 12:18 pm

calebmelvin wrote: Throwout bearing or clutch related?

I second the motion ......

Thu Jul 24, 2008 12:33 pm

But that would make noise when you pushed the clutch in, my money's on a bad CV, one of the few items that only makes noise under load.

Thu Jul 24, 2008 12:35 pm

hmmm

well the odd thing is that the frequency seems to match that of a wheel revolution, which is what i thought it was at first, i pushed in the clutch so i could let the engine back down to idle so i could hear better. but then the sound goes away every time i do that.

i dont think its clutch related, as noises from that would match in frequency with engine RPMs, correct?

how about gear related? i still have not cracked into my trans to check the fluid, as ive been unable to find GL-4, and ive read about folks changing thier gear oil only to create new leaks from the thinness of the new oil... i guess i need to get under there and at least check it.

Thu Jul 24, 2008 12:42 pm

onion456 wrote: hmmm

well the odd thing is that the frequency seems to match that of a wheel revolution, which is what i thought it was at first, i pushed in the clutch so i could let the engine back down to idle so i could hear better. but then the sound goes away every time i do that.

i dont think its clutch related, as noises from that would match in frequency with engine RPMs, correct?

how about gear related? i still have not cracked into my trans to check the fluid, as ive been unable to find GL-4, and ive read about folks changing thier gear oil only to create new leaks from the thinness of the new oil... i guess i need to get under there and at least check it.

By pushing in the clutch you reduce the load, causing the CV noise to go away. Matching wheel revolution also is a good indicator of this as the problem. A CV problem makes sense and is easier to fix than a tranny problem, I would check there first.

Thu Jul 24, 2008 12:45 pm

Bad CV... see my post about Albanian Mechanics!

Thu Jul 24, 2008 12:46 pm

alright, i will look into CVs as the possible culprit =)

Thanks for the input all

Fri Jul 25, 2008 5:22 am

CV or it could also be a rear wheel bearing.

Does letting off the throttle also stop it?

Fri Jul 25, 2008 6:31 am

havent noticed that, i will pay attention tho. bus ran excellent this morning, did not hear that sound today.

Fri Jul 25, 2008 7:49 am

You can repack those 4 CV joints for cheap money ~ $40 and a days worth of work. They are supposed to be done every 30K miles and then they will last forever. When were yours last done?

Fri Jul 25, 2008 10:56 am

lol probably never.... ive only owned the bus for 2 years, and a year and a half of that she wasnt running. have no idea of the rest of the history of the bus, other than that she sat for at least 3 years just before i got her... PO was likely not the mechanical type, either.

guess its time to do it then! will be my first time doing them. not even sure where they are. =D i will search for details on the procedure (unless someone feels like posting what needs to be done...)

Fri Jul 25, 2008 10:59 am

found this great article... (again found in one of Randy's posts- thanks Randy!)

http://www.type2.com/bartnik/cvjoints.htm