SAAB V4 Forum
SAAB V4 Forum
Home | Profile | Register | Active Topics | Members | Search | FAQ
Username:
Password:
Save Password
Forgot your Password?

 All Forums
 Technical
 General Technical
 Input Bearing
 New Topic  Reply to Topic 
 Printer Friendly 
AuthorPrevious Topic Topic Next Topic 

stevebod
V4 Fanatic

United Kingdom
416 Posts

Posted - 25 Mar 2017 :  15:02:45 Show Profile Reply with Quote
Hi All,
I am just putting together a new gearbox and decided to replace the input shaft bearing and seals. The new bearing seems a surprisingly loose fit in the bell housing. Is there something wrong or is it supposed to float? I've tried to show the free play in the low quality video.
http://www.steves-workshop.co.uk/temp/input-bearing.mp4
The bearing part number was SKF6005 and it has an outside diameter of 47mm. I've since lost the old bearing to make a comparison ahem.

72sonett3
V4 Fanatic

Spain
269 Posts

Posted - 26 Mar 2017 :  22:42:02 Show Profile Reply with Quote
When I had a '77 96 engine out, I too noticed the loose fit, but I think the play was in the bearing's ball race rather than in the fitting of bearing or shaft.

At that time I only replaced the pilot bearing, the gearbox is still in the car and works OK.

--
'72 97
'77 96L conv.
'79 96GL (LPG)
'83 900i (LPG)
'95 900SE conv.
'99 9-3T
Go to Top of Page

stevebod
V4 Fanatic

United Kingdom
416 Posts

Posted - 27 Mar 2017 :  16:15:20 Show Profile Reply with Quote
Thanks for the reply Martin.
In the meantime I have located the old bearing and it is the same size as the new one so this suggests it is supposed to be loose. However I can't see what purpose it serves being a loose fit in the housing. It would provide not radial positioning of the shaft.
Go to Top of Page

melle
V4 Guru

United Kingdom
3830 Posts

Posted - 27 Mar 2017 :  16:53:14 Show Profile Reply with Quote
Edit, just watched the video, doesn't look good to me but I'm a complete gearbox noob...

www.saabv4.com

Edited by - melle on 27 Mar 2017 16:57:40
Go to Top of Page

stevebod
V4 Fanatic

United Kingdom
416 Posts

Posted - 30 Mar 2017 :  10:19:06 Show Profile Reply with Quote
Guys, A further update from my side.
I borrowed some bore gauges from work and checked the dimensions of the bell housing hole. It measured 47.53 which is about 0.5mm oversized.
Does anyone know if the bearing is suppose to float in the housing? I guess one end of the shaft is held in the flywheel and the other in the free-wheel, so perhaps the bearing floats to avoid misalignment?! Seems odd though because this would make the bearing redundant.

Edited by - stevebod on 30 Mar 2017 10:21:45
Go to Top of Page
 Previous Topic Topic Next Topic 
 New Topic  Reply to Topic 
 Printer Friendly 
Jump To: 
Snitz Forums 2000
SAAB V4 Forum© 2000-04 Snitz CommunicationsGo To Top Of Page