Strange sound

[liljlandon]

Recently ive had a strange sound coming from somewhere in the tranny, but only when Im in neutral and have the clutch disengaged.

It sounds remarkably like valves tapping, but I checked that and narrowed down the sound to the tranny. I cant feel any vibrations in the transmission and Its only when the trannys in neutral.

5th gear has some whine to it, but otherwise the tranny is fine. Any ideas on what it could be?

 

[Joe Egolf]

throw out bearing is my guess

 

[liljlandon]

Its brand new, maybe 5000 miles on it... I went with Oriellys, so that may be the problem.

 

[cruiser88]

The front bearing in the tranny.....easy enough fix

Throwout

Pilot bearing?

 

[2ndGenToyotaFan]

So, only in neutral with the clutch engaged, IE it's turning the input shaft in the trans?

Does it slow down and go away when you press the clutch pedal in?

 

[liljlandon]

It only makes the noise when the transmission is in neutral with the clutch pedal out. It goes away when th clutch pedal is pressed down.

Funny thing is, Im the only one who can hear it without a hose stuck to the tranny/engine area... It just suddenly started one day. I got my self high centered the day before on a dirt pile, but thats the only wheeling ive done since the rebuild besides a few clay pits here and there.

 

[2ndGenToyotaFan]

Sounds like an input shaft bearing... I drove my old 86 like that from CA to IN... If the noise isn't too bad, I'd say it could wait a little while, but you'll need a trans rebuild sometime soon.

 

[liljlandon]

Whole rebuild or just the front bearing? Im pulling the tranny when i do my crawler gears. Worth replacing then?

 

[cruiser88]

I think if you catch it early you might be fine..........you can go a long time on that s***ty bearing. I think marlin has a replacement seal and all.

Whole rebuild or just the front bearing? Im pulling the tranny when i do my crawler gears. Worth replacing then?

 

[2ndGenToyotaFan]

The input shaft rides on one ball bearing at the very front of the engine, and a set of large needle bearings between the input and output shafts, if the noise is there in every gear but 4th, then it's the needle bearings and that's kind of a major deal. if the noise is there all the time except when the clutch is in and the input shaft isn't spinning, then maybe it's the front bearing. The front ball bearing can't be changed from the outside on the G52, or at least not on my dads, it has a snap ring on the inside, so you have to pull the front half of the trans housing no matter what.

The bottom line is, it's not a huge deal to open up a trans, you have to learn somehow!

 

[liljlandon]

Doesnt make the sound in any gear, just when the clutch pedal is 'out' and the trannys in neutral. 5th has a slight whine to it, but nothing to concern me... yet... Problem with learning now is, if i cant learn within the weekend, then im out of my DD

 

[toy4xfun]

it could be your throwout bearing.

 

[2ndGenToyotaFan]

The pilot and throwout bearings are not supposed to be turning when the pedal is released.... It has to be on the input shaft, and if you can't hear it when you're driving, then it's probably not that bad yet.... as the input shaft is always spinning when you are driving.

 

[tlcruiser66]

Throwout bearing, replace and you're done.

 

[2ndGenToyotaFan]

It's not the throw out bearing. The TOB only turns when you push the pedal in, not when the pedal is out. It's the input shaft bearing(s).

 

[liljlandon]

I'm starting to hear something in fifth, but i cant really tell you what it is because i have yet another exhaust leak. Which is becoming very annoying...

 

[hardontoyotas]

it sound like it could be the pilot bearing or the input shaft bearing, the pilot bearing is still turning but only at flywheel speed does it get louder when you rev up the vehicle in neutral?

 

[cruiser88]

Jared is correct....we both have been there. Its not a hard fix

It's not the throw out bearing. The TOB only turns when you push the pedal in, not when the pedal is out. It's the input shaft bearing(s).

 

[liljlandon]

The noise goes away with higher rpms, which leads me to think its a vibration. but the location just doesnt make sense.

 

[toy4xfun]

The throw out bearing is not supposed to turn when the clutch is released. Well lets look at a merry go round then it should stop as soon as some one stops turning it. And the throw out bearing if sloppy would make noise when no pressure was on it but as soon as pressure was put on it it would stop, until it gets so bad that it slops around all the time.