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Old 12-28-2012, 07:59 PM   #27 (permalink)
California98Civic
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Join Date: Mar 2011
Location: Coastal Southern California
Posts: 6,299

Black and Green - '98 Honda Civic DX Coupe
Team Honda
90 day: 66.42 mpg (US)

Black and Red - '00 Nashbar Custom built eBike
90 day: 3671.43 mpg (US)
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Update: more testing done

Test for front hub bearing units:
Quote:
Originally Posted by ron View Post
you should FEEL the problem however slight it may be ,you should feel a diff between one wheel or the other . like gravel in one shoe .
Did it. No unusual sounds and no play whatsoever. Totally within Honda spec.

Brake disc shield check:
Quote:
Originally Posted by PaleMelanesian View Post
...did you check the brake disc shield behind the front discs? I bumped mine when I replaced the half-shafts, and it was scraping on the back of the disc.
They're normal and in place, without contact against the discs.

So I am concluding that the bearing noise I hear is coming from the transmission, because all other possibilities that I know of seem to have been eliminated by testing: it's not the brake pads, rotors, hub units, CV joints, or wheel scraping.

QUESTION: Which bearing inside the transmission might make the sounds I am hearing? It is a constant sound, changing only with wheel RPMs, not engine RPMs. If while rolling I turn the wheel slightly left or right or hold it steady then the sound changes slightly, but always in a predictable pattern, meaning left always produces the same changes in the sound, as does right, or straight. I am assuming it cannot be the throw out bearing or the input shaft bearing, based on a post Ryland offered on another thread.

Thoughts?

I am going to replace the transmission myself and rebuild this one, if possible using a VX final driven gear I have on hand and a bearing kit I'll buy for the experiment.

Thanks!

james
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See my car's mod & maintenance thread and my electric bicycle's thread for ongoing projects. I will rebuild Black and Green over decades as parts die, until it becomes a different car of roughly the same shape and color. My minimum fuel economy goal is 55 mpg while averaging posted speed limits. I generally top 60 mpg. See also my Honda manual transmission specs thread.



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