Dean -
If the noise goes away or changes its tone when you
step on the clutch pedal, it means your clutch
throwout bearing is shot. Thankfully it just means
you need to replace the clutch throwout bearing (and
the rest of the clutch while you are at it), but not
the gearbox.
Cheers,
Alan
'53 BN1 '64 BJ8
--- Dean Caccavo <healeybn7@yahoo.com> wrote:
> If you are offended by the subject please delete.
>
> Even with that out of the way it does seem like a
> bad
> time to bring up modification questions, but I have
> been trying to run down a bearing noise in the
> 5speed
> Toyota transmission that I installed a few years
> back
> (going on 7 years), and could use some outside
> expertise. Recently it started making noises.
>
> Symptoms/Observations:
> Bearing rumble at idle - foot off clutch. Sounds
> like
> the transmission is dry or low on fluid.
>
> Noise goes away when the clutch is depressed or when
> you attempt to select 4th gear (activate synchro)
>
> Actions to date:
> Removed the transmission and had it rebuild by a
> local
> tran shop. Reinstalled it this weekend and the noise
> is still there, if not worse. Shop said they
> replaced
> synchros (fine) and all bearings. I collected the
> used bearings and synchros, with the exception of
> the
> inner input shaft bearing (roller type), which they
> did not provide.
>
> I suspect that it was not replaced, as my symptoms
> indicate an input shaft problem - why else would
> slightly engaging 4th mitigate the noise.
>
> Rulled out pilot bushing as it is silent when the
> clutch is depressed. Aside from the noise the trans
> works great and the clutch provides full
> disengagement
> - no crunching in non-synchro reverse.
>
> Help:
> I will have a conversation with the trans shop -
> perhaps even bring the car to them so they can
> listen
> for themselves. Am I missing anything?
>
> Dean - BN7
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