New Trans/Clutch Prob

[nicksfj-40]

I have a 1973 FJ-40, Standard F motor and Three Speed.

I drove the 40 when we had some snow a few weeks back and had it in 4 Hi on the highway. Took it out (of 4 Hi) in the neighborhood and parked it in garage. Couple of days later I got in to drive it to work and when I let out the clutch in reverse had some weird vibes. Felt like something was binding. Parked it and left it. Decided I was going to drive it a little farther a couple of days later and drove to a park by the house. Initially made the weird noise/vibration when the clutch was released. After a few blocks sound would disappear. When I went to pull back in the driveway again it started up again. It will make the noise when the trans is in neutral and only when you take your foot off of the clutch (engaged I believe). Any ideas? My initial thought was that the trans was going out but now I am wondering if it isn’t the clutch or throw out bearing. I am going to pull the inspection plate tonight and take a look. Any ideas?

 

[Magnum44]

Sounds like it could possibly be a bearing in the tranny. With the clutch engaged the input shaft is turning with the flywheel which should rule out the pilot bearing and the t/o bearing (unless it's rubbing against the clutch levers). One other thing is when you installed the tranny did it go in easily? I asked because once I did a big no no and ran the tranny in with the bolts and ruined the pilot bearing. The tranny would rock and vibrate because there was no support on the input shaft end.

 

[nicksfj-40]

So you think it is in the tranny huh? That does make sense since it is when the clutch is engaged. Does it mean anything if it still makes the noise when the trans is in neutral?
The trans also does not make any weird noises while driving (unless I cant hear them). Seems like it is only at idle. I did not get to pull the inspection plate tonight because I was working on a final for school. Tomorrow night hopefully.

 

[dargreg]

Sometimes, if you were in wet weather,the presure plate can get corrosion on it from sitting so as to make a binding effect in the clutch while you are letting it out .If it didnt do this before your snowy drive thats more than likely what it is . It usually fixes its self.

 

[nicksfj-40]

I was thinking something along these lines. Never had aproblem until the snow, which was really wet. My throwout bearing is old so that is what I first though. But that doesnt jive with the fact that it makes the noise only when the your foot is off the clutch.

 

[bsmith123]

Hubs?

Are you in 2WD but still have the front hubs locked in?

 

[nicksfj-40]

Are you in 2WD but still have the front hubs locked in?

No hubs are not engaged. Its weird because it wont make the sound. Then all of a sudden will satrt it. Then it will go away again. Sounds like something rubbing on the flywheel..but I have no idea. I really need to finish some stuff for school but I really want to get underneath and take a look.

 

[CruisinMT]

is it a chirping sound? My 3 speed chirps everyonce in a while when the the finger clutch contacts the T/O bearing, this is in neutral with my foot off of the clutch. My noise is very faint and occurs rarely. I believe i need to readjust my clutch slave and master cylinder to prevent this noise. take off the inspection cover and check it out, it's only 4 bolts I think two are 12mm and two are 13 or 14mm. you should be able to see whether or not it's your T/O contacting the three-fingers of your clutch.

 

[Magnum44]

Sounds like it could possibly be a bearing in the tranny. With the clutch engaged the input shaft is turning with the flywheel which should rule out the pilot bearing and the t/o bearing (unless it's rubbing against the clutch levers). One other thing is when you installed the tranny did it go in easily? I asked because once I did a big no no and ran the tranny in with the bolts and ruined the pilot bearing. The tranny would rock and vibrate because there was no support on the input shaft end.

I'm not trying to alarm you because it could be the t/o brg. if it were making contact with the levers/diaphragm on the clutch but usually there should be a small gap. many later model vehicles run "self aligning" bearings, have high heat seals and grease because there is no adjustment on the push rod. hopefully it's something minor. keep us posted.

 

[nicksfj-40]

cover

Pulled the inspection cover last night. Nothing looked out of place. The throwout bearing is noisy when I move it around. I noticed that the clutch fork is touching the front of the transmission. I made a sketch to describe what I am talking about.

 

[CruisinMT]

you may be able to adjust the clutch slave cylinder to keep the fork from hitting the tranny. I know some may not recommend this but I had to adjust the nuts on the end of the clutch forks to get the room I needed when I reinstalled my 3 on the tree tranny. it will give you more room to lengthen your slave cylinders pushrod and get the fork off of the transmission. Someone may chime in with better advice. Also is the vibration when you are letting out your clutch? Does it vibrate when it starts to move forward and backward and then when going down the road no vibration?

 

[nicksfj-40]

fg

The vibration is intermittent. My question is: is the clutch fork supposed to be like that? Do I need to adjust the slave cylinder? I am a little confused as to adjusting the play at the slave as well. Is there supposed to be a small amount of clearance between the pushrod and the clutch fork? Or is it something else?

No matter how much I back off my slave it is still in contact with the clutch fork.

 

[CruisinMT]

if you could take a picture it might make things a little bit clearer. Is your clutch fork still attached to the pivot ball on your bellhousing? I believe the clearance you really need to worry about is between the T/O and the 3-finger clutch. you should be able to spin the T/O without having it hit any of the fingers.

 

[Magnum44]

The vibration is intermittent. My question is: is the clutch fork supposed to be like that? Do I need to adjust the slave cylinder? I am a little confused as to adjusting the play at the slave as well. Is there supposed to be a small amount of clearance between the pushrod and the clutch fork? Or is it something else?

No matter how much I back off my slave it is still in contact with the clutch fork.

There shouldn't be any clearance between the pushrod and fork. Like cruisenMT said the fork pivots of a bolt on the bellhousing.

 

[nicksfj-40]

10-4.
That is what always confused me. I never understood how you could get play between the fork and the rod since their was a spring on it. My clutch is way out of adjustment then. I think I have it as far from the T.O. bearing as possible hence the fork against the transmission face. I also greased everything and messed with the slave rod before it snowed. I will set it to specs tonbight and see if the sound goes away.

 

[amaurer]

10-4.
That is what always confused me. I never understood how you could get play between the fork and the rod since their was a spring on it. My clutch is way out of adjustment then. I think I have it as far from the T.O. bearing as possible hence the fork against the transmission face. I also greased everything and messed with the slave rod before it snowed. I will set it to specs tonbight and see if the sound goes away.

The FSM does specify some play between the slave rod and the fork - you take the spring off to measure it. If I recall correctly its somewhere between 2 and 5 mm. My experience is with a 4 speed, but I'd imagine its similar for you.

The gap is necessary to ensure the slave pulls the fork all the way off of the clutch when its engaged. Failure to set it properly would result in a dragging TO bearing which accumulates far too many rotations and subsequently dies. I don't know how the finger adjustments fit in with this, but thats how it is for diaphragm spring type pressure plates.

 

[amaurer]

I thought that their was a measurement between the fork and the rod.

I thought thats what I said...?

 

[nicksfj-40]

j

Well. I adjusted the slave and that gave me a lot more clutch pedal felt great.
Started it up and the noise started. Got underneath with it in neutral and the rear driveshaft was vibrating. Got in the cab nd put thr transfer case in neutral and the noise stopped. Put in 4 lo and vibration is back. 4 hi ..vibrations.
Basically anytime the transfer case is engaged in a gear the rear drive shaft vibrates badly. Any ideas?
I think it may be going tits up.
Anybody have a three speed and transfer case that they dont want?

 

[nicksfj-40]

Actually, It looks more like the rear driveshaft is trying to spin.
Is my case trashed?
Dont know why the rear drive shaft would try to move when the transfer case is engaged.

 

[Trollhole]

Well. I adjusted the slave and that gave me a lot more clutch pedal felt great.
Started it up and the noise started. Got underneath with it in neutral and the rear driveshaft was vibrating. Got in the cab nd put thr transfer case in neutral and the noise stopped. Put in 4 lo and vibration is back. 4 hi ..vibrations.
Basically anytime the transfer case is engaged in a gear the rear drive shaft vibrates badly. Any ideas?
I think it may be going tits up.
Anybody have a three speed and transfer case that they dont want?

Rear driveshaft shouldn't vibrate. If you were to grab the parking drum can you move it in and out or back and forth?

My bet is your 3spd tranny is going out.

Sure there is oil in it?