Clutch or bearing noise question

[Lyndon302]

Motor has been out. Trans has been out the clutch as well. Did a rear main

It's now nosey at idle in neutral. Depressed clutch no noise. It sounds more tinny noise. I believe it's noiser when in the car. Not so standing next to it outside.
When driving I'm getting a cluncking or knocking when slowing down and it's in to high ba gear. Say 15 km in second with little or no throttle. Almost like half shaft play but I believe it's the same issue.
Doesn't sound like a bearing but I don't have a great deal of experience.
2.0 L 901 SPD.
Lyndon

[911obgyn]

Check adjustment. Clutch, shifter.

[Lyndon302]

Just accoured to me. I bet the thrust is not tight enough or loose enough. It's rattling on the pressure plate.
Lyndon

[gled49]

Transmission Main shaft bearing, in the 70’s we replaced them all the time. Sounds like that to me.

[john walker's workshop]

Agree, mainshaft ball bearing in the intermediate plate.

[Lyndon302]

Well that's ok. I've got all my parts for the syncros. A job for winter.. So I best buy a bearing as well.

[john walker's workshop]

Buy the ball bearings for both shafts. If you do syncros, do the sleeves, too.

[Lyndon302]

I have dogs. Sleeves and syncros.
The two bearings are obvious on the parts book.

[Antomero]

I have the same symptoms also. After a spirited drive I get the rattling bearing/metallic sound as well. If I press the clutch in the sounds goes away. I just had my 915 gearbox totally rebuilt. Do you think my mechanic wouldn’t replace the main shaft bearing?

[Lyndon302]

I've had a look at bearings. Pricey and varying brands.
I'm in Australia. What's a good shopping list to buy before I pull it apart as far as bearings go.
Thanks lyndon

[yelcab1]

Sounds like ... an expensive job.

[Lyndon302]

Originally Posted by john walker's workshop

Buy the ball bearings for both shafts. If you do syncros, do the sleeves, too.

John your referring to the two 4 point bearings in the plate ??
These are a must and wait and see on the other bearings ?
Lyndon

[john walker's workshop]

Yeah, usually the rollers are still decent. The retainer plate that clamps the bearings can develope some wear resulting in end play of the mainshafft and double ball bearing, so check that. Save the gaskets between the main housing and intermediate plate and measure their thickness. They relate to pinion depth. Try to find a double ball mainshaft bearing with steel ball cages, rather than brass.

[Lyndon302]

Rollers ?? All the other bearings ?? It's the two in the plate I need to address . They are double row bearings. ??
Any direction to get the steel cages ??

[KTL]

I don't disagree with the guys like JW and Gordon who have done a ton of 911 transaxle service. But I have to ask a different question. Did you happen to replace the shifter coupler in the back of the cabin with a precision u-joint style like the Wevo or the Stomski? If so, those u-joints can provided a noticeable increase in trans noise.

[Lyndon302]

Originally Posted by KTL

I don't disagree with the guys like JW and Gordon who have done a ton of 911 transaxle service. But I have to ask a different question. Did you happen to replace the shifter coupler in the back of the cabin with a precision u-joint style like the Wevo or the Stomski? If so, those u-joints can provided a noticeable increase in trans noise.

It's all std.

[Lyndon302]

Originally Posted by john walker's workshop

Yeah, usually the rollers are still decent. The retainer plate that clamps the bearings can develope some wear resulting in end play of the mainshafft and double ball bearing, so check that. Save the gaskets between the main housing and intermediate plate and measure their thickness. They relate to pinion depth. Try to find a double ball mainshaft bearing with steel ball cages, rather than brass.

Ok rhe gasket. A few years ago it was replaced.
I didn't measure nor know it was a certain thickness.
Just stuck a gasket in I got from pelican.
So when I pull it apart how do I go about getting the correct gasket ??
Thanks lyndon

[john walker's workshop]

Being that we don't know the original measurement, if the ring and pinion is still smooth and perfect, just use the same thickness.

[Lyndon302]

Originally Posted by john walker's workshop

Being that we don't know the original measurement, if the ring and pinion is still smooth and perfect, just use the same thickness.

Will do

[Lyndon302]

Originally Posted by john walker's workshop

Yeah, usually the rollers are still decent. The retainer plate that clamps the bearings can develope some wear resulting in end play of the mainshafft and double ball bearing, so check that. Save the gaskets between the main housing and intermediate plate and measure their thickness. They relate to pinion depth. Try to find a double ball mainshaft bearing with steel ball cages, rather than brass.

John. All I can find are brass cage's. ??
Any pointers.
Lyndon