Gearbox and Clutch FAQ / troublshooting

[wynode]

Does the sound increase with RPM? Also does it go away when you engage the clutch (press the clutch pedal in) ?

[hondaEK4]

Does the sound increase with RPM? Also does it go away when you engage the clutch (press the clutch pedal in) ?

Yes it does go away as i disengage the clutch. in 1st gear it starts whining in the low rpm and gets louder, also when in other gears when i down shift lets say from 4th to 3rd and 3rd to 2nd. and the sound is now getting louder.

[wynode]

Ta. Have a read of the first post and tell me what you think it is

[hondaEK4]

Yeh thanks, its the ISB in the first post what does it mean if you can hear it in idle? mine doesn't

[jim57a]

just a note, you can get a new bearing from CBC Australia.
recently got mine from there. 1 for $16, 2 for $19. go figure

[trentd]

get a new one

[munkaii]

Sorry to bump thread a long way, but its relevant so i'll post here. I own a DC5R with 77000 on the clock and I heard that DC5R clutches tend to let go around the 80k mark. I also have a noisy bearing in the gearbox (ISB i believe as it disappears when i disengage clutch). Was wondering if it's still ok to track it and not need to worry about the bearing fail? Or should I get new bearings asap? Might as well replace the clutch then as well.

[Benson]

Replace the ISB asap. If you leave it any longer, the whole bearing can fail and casue major damage to other components in the gearbox.

[munkaii]

How about for normal street use benny where these less stress on the gearset and bearings? Have read on about how some mechanics say ISB noise isn't too much of a problem and is still driveable with, since opening up the box isn't cheap labour.

[hondaEK4]

How about for normal street use benny where these less stress on the gearset and bearings? Have read on about how some mechanics say ISB noise isn't too much of a problem and is still driveable with, since opening up the box isn't cheap labour.

i've asked about this 6months ago, haven't fixed the problem still runs fine after 6months maybe a bit noisier.

[wynode]

i've asked about this 6months ago, haven't fixed the problem still runs fine after 6months maybe a bit noisier.

It's never a problem till it fails

If it's got noisier it means it's getting worse. A failed ISB isn't like say a flat tyre that you can just fix up after the incident. A failed ISB has the potential to litter the inside of the gearbox with its fragments. Consequently causing further damage to the rest of the box.

If the noise is getting worse and you haven't got any plans to fix it, expect your damage bill to be higher when it does fail.