jouslee

Ok, this needs to go on the archives or something, so is it:

Clutch pedal in, whining noise = Throwout bearing?
and
Clutch pedal out, whining noise = Pilot bearing?

Or is it
Clutch pedal in, whining noise = Pilot bearing?
and
Clutch pedal out, whining noise = Throwout bearing?

311unity13B

pedal in, whining is TOB

My5ABaby

iTrader: (7)

Noise coming from the transmission

Clutch pedal pressed – Throwout bearing
Fix: replace

Clutch pedal not pressed – Input shaft bearing
Fix: replace

In all gears regardless of clutch – Transmission gears
Fix: New transmission
Band-Aid: Better transmission fluid

1st gear whining – Input shaft bearing
Fix: Replace

jouslee

Input shaft bearing = Pilot bearing?

Pilot bearing = the small little cylinder with little needles in side?

My5ABaby

iTrader: (7)

Yes.

SureShot

The pilot bearing is only spinning when the clutch is disengaged, and the tranny is in gear. Of course the release (TO) bearing is spinning also.
To isolate the two, select neutral, and release the clutch just enough to spin up the input shaft. When the input shaft is spinning at engine speed, the pilot bearing is not turning.

This also works in the reverse order.
Engine running, tranny in neutral, just start to release the clutch. The release bearing loads before the input shaft spins down & the pilot bearing begins to spin.

Smoken'

iTrader: (1)

Input shaft bearing is not the same as pilot bearing. There are two bearings that are on the input shaft, one in the E-shaft and the other in the tranny. If you are getting noise with the car in neutral and the pedal disengaged, it is the input shaft bearing which is actually located in the transmission.

If you push on the pedal to the point where the clutch starts to disengage and it makes noise then it is the throw out/release bearing.

If you push the peday all the way to the floor and it makes noise, then it is the pilot bearing.

It helps to do them in that order as well.

My5ABaby

iTrader: (7)

I just compile data from searches, most of which have various results. That clears it up.

Clutch pedal not pressed/neutral – Input shaft bearing
Fix: replace
Clutch pedal pressed half way – Throwout bearing
Fix: replace
Clutch pedal fully pressed – Pilot bearing
Fix: replace

SureShot

Smoken' - I like your description better than mine.
-Bill

jouslee

Ok this needs to go in the archives, I've seen way too many confusions in T/O bearing, pilot bearing, and input shaft bearing.

VacavilleFC

where can i get a input shaft bearing?

RotaryResurrection

iTrader: (8)

The throwout bearing is only used/turning when the pedal is pushed. WHen the pedal freeplay stops and you feel resistance building, the throwout bearing is touching the pressureplate. When the pedal is at rest, the throwout bearing is not spinning or touching the pressureplate at all.

The pilot bearing is also only used when the pedal is pushed. IT does start spinning after the throwout bearing when the pedal is pushed in, since it takes the pressureplate a small amount of time to release the clutch disk and let it spin independently of the flywheel which is when the pilot bearing works.

So basically the pilot and throwout bearings work at the same exact times, but technically the pilot bearing doesnt work quite as much as the throwout bearing each time the pedal is pressed and released. Between the 2, the pilot bearing tears up a lot easier than the throwout...the pilot is small and open to contamination, whereas the throwout is a larger, beefier sealed bearing and rarely fails.

IF you do a lot of high rpm shifting, or a lot of free revving between shifts or in neutral, you're putting stress directly on the pilot bearing and will kill it faster. I've killed a couple of fairly new ones in my time by shooting flames and playing around.

All the rx7 manual trannies make a little whir/whine while in neutral with the clutch pedal at rest. Even the lower mile ones I've been around. Sometimes you hear it more or less depending on exhaust setup/noise, lack of insulation around the shifter, etc, but it is always there. This is usually assumed to be the input shaft bearing internal to the trans, and cant be easily replaced (I am not a trans mechanic at all, though). IT could also represent wear on the mesh of the 2 main gears on the main and counter shaft. The dead NA trannies that made sounds like "rocks in the box" or simply lost some gears, all had broken teeth on these gears. THis included a couple I killed myself.

Either way, the whining in neutral (with pedal at rest) or while in gear (more advanced wear) is internal to the trans and will require a rebuild or a replacement trans, and isnt something you can expect to fix yourself.