Transmission Question

[moggyman64]

Hi BEEK, can you say exactly which bearings are spinning when the tranny is in neutral with the clutch pedal out? Then I can cross reference them to the Haynes manual and see exactly where they are in the trans, that would really help. Then If I remove the potential culprits and take them to the engineering shop they should be able to test each bearing for me, thats my plan

Keith

[BEEK]

personally at this point, i would take every bearing and check them all. you have to dissasemble the whole trans anyway

[moggyman64]

My god, the thoughts of removing all those gears and syncro hymmmmm

Keith

[moggyman64]

Hi guys,

One further thought, what noise is to be expected from the transmission, afterall the majority of parts are 32 years old, the only way I can describe the noise I hear is it sound exactly like the sound you get from a skate board wheel . The faster you spin it the more the sound increases. This sound best describes what I hear in neutral. And if you pivture this sound in your mind, could it not also be explained by the gears of the two shafts meshing at the different speeds?

As said earlier when in neutral the input and lay shaft and associated gears and bearings are spinning in relation to the crank speed, so pleanty of moving parts so bearing in mind the age of the transmission and wear should there not be some noise expected, I Really dont know how this tranny ran before I had it rebuilt so dont have anything to compare it to but should I expect it to run quiet, do yours run silent like in a modern car? plus maybe I have been using too thin oil.

Not trying to convince myself not to do the bearings but just trying to rule out all possibilities so I dont replace bearings etc only to find that the noise is just down to wear and tear.

Could this noise be related to the clutch throw out/release bearing?

When I fitted the new pilot bearing into the crank / flywheel I just pushed it into place, is that correct or should I have applied some sort of locktite? could the outer race of that be spinning and causing the noise I describe?

Can I please ask those kind enough to reply to my posts to reply to the entire post if you can because sometimes people comment on one little bit of the post and I need to keep revisiting items that dont get answered.

Regards

Keith

[moggyman64]

Hi Guys, why have all the helpful comments dried up? Please comment on my last post.

keith

[fiatmike124]

Since you are now talking about 32 year old parts, I'm a little confused as to what you mean by rebuilt. It is very likely to be a bad bearing and probably the input shaft bearing. It cannot be the pilot or release bearing because they are not spinning in neutral with clutch engaged. The outer and inner race of the pilot bearing are turning together with the crank and input shaft. As mentioned above, the trans need to be disassembled so everything should be inspected anyway. Until then, it's all speculation as to the exact cause of the noise.

[moggyman64]

Thanks Mike,

Soild answers.

When I said rebuilt that was bearings and syncros, the gears etc were all perfect according to the engineer shop.
I still have a feeling that the angle that I had the tranny sitting at in the car is responsible for causing the premature bearing failure. Assuming it is the bearing(s)
Is there a better book than the Haynes manual to describe the stripdown and rebuild or info I can download, I know it has been said that with common sense it is straight forward to work on the tranny but I would just like to be prepared before starting because the haynes manual is as much use as a chocolate fire guard. It is info on how to examine the parts / tolerances etc that would help.

Regards

keith

[seabeelt]

The tranny repair manual is available on line, I believe. http://car-service-manuals.com/catalog/ ... ansmission
If this doesnt work, shoot me a PM with your email.
R/

[moggyman64]

Thanks Seabeelt,

That manual has a lot more information than Haynes, much obliged. I will read through before I start.

Thanks to everyone else that took part in this thread, I will let you know what I find when I open the tranny

Keith

[seabeelt]

You are welcome. There are some photos here from when I rebuilt mine.
http://s198.photobucket.com/user/seabee ... 3915505437

I have more, but thats all thats posted on the site
r/

[moggyman64]

Thanks again Seabeelt,

When I start if I have any problems or questions is it ok to PM you.

Regards

keith

[seabeelt]

More than welcome
R/

[blurple124]

Well I think I may be in for a rebuild at some point in the future, but if I can do some work to buy myself some time, I might.


I need help identifying another noise with my tranny - a much worse one.

Under engine braking, gears 1,2,3, and 5 make a horrendous grinding noise. Fourth is quiet as a mouse and none pop out of gear. Furthermore, all gears are relatively quiet as long as the engine is applying the load to the transmission. No noise during engagement, either. If it is in gear and I let off, though, it makes a noise that causes the hairs on the back of my neck stand up.

I am still learning how these transmissions work, but maybe this information is enough to figure out which parts are going bad.

[moggyman64]

Wow blurple124, I thought I had problems but they seem pretty small compared to the the stuff you have going on inside your tranny, unfortunately I too am learning so cant help but I have no doubts that the guys on here will point you in the right direction, although if I honest, based on your symptoms I dont think your going to like what they are going to say, good luck

Keith

[blurple124]

Yea, I'm going to have some fun with it.

I seem to get the most noise from the gears when I am in the rev-range for that speed. i.e. going 40 miles/hour in fifth and letting off of the throttle doesn't make too much noise, but the grinding seems to skip. If I do that at 60 mph, it is a steady grind.

In other news, the syncro for second is shot, but I don't need help with that one! haha.


So tranny rebuild. New bearings, seals, syncros and springs? Or do I only replace what I need to?