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PostPosted: Wed Sep 06, 2017 4:52 pm 
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Saab Nut

Joined: Mon Oct 16, 2006 8:17 pm
Posts: 1228
Location: Lincoln
Car Model: 9-5 estate 900 8v 95 van
Hi folks now the van is nearly finished we are looking at the next project. It's a 95 v 4 in topaz yellow, body style under consideration. Anyway we have two gearboxes,one complete with slave cylinder,pipework and freewheel mechanism but quite a lot of wear on the input shaft. The other one is missing all the extra bits but has a better input shaft. Both turn well by hand via the drive shaft or input shaft. Anyone any ideas please on which would be the better way forward given that both are relatively unknown quantities?


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PostPosted: Wed Sep 06, 2017 5:03 pm 
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UKS Addict

Joined: Fri Aug 05, 2005 6:51 pm
Posts: 2405
Location: Cheshire
Car Model: Saab 900 and 99
All else being equal, just swap the bellhousing over.

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PostPosted: Thu Sep 07, 2017 6:11 am 
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Saab Nut

Joined: Mon Oct 16, 2006 8:17 pm
Posts: 1228
Location: Lincoln
Car Model: 9-5 estate 900 8v 95 van
99 EMS wrote:
All else being equal, just swap the bellhousing over.

Thanks for that Dave will give it a try. The shell is the one we got from you last year.


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PostPosted: Thu Sep 07, 2017 7:44 pm 
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Full Pressure Turbo
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Joined: Sun Jul 29, 2007 9:32 pm
Posts: 837
Location: Bath/ Dublin
Car Model: 8V-V4
I would take the top lids off and inspect the boxes visually. My experience with gearboxes is very limited, so others may have better ideas.

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PostPosted: Thu Sep 07, 2017 7:55 pm 
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Light Pressure Turbo

Joined: Fri Jun 16, 2006 9:26 pm
Posts: 424
How does the wear in the input shaft manifest itself?


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PostPosted: Thu Sep 07, 2017 8:43 pm 
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UKS Addict

Joined: Fri Aug 05, 2005 6:51 pm
Posts: 2405
Location: Cheshire
Car Model: Saab 900 and 99
melle wrote:
I would take the top lids off and inspect the boxes visually. My experience with gearboxes is very limited, so others may have better ideas.


Taking the top lid off will reveal very little, apart from poor storage in damp conditions, the top half of the gears could be rusty, even if they are OK, the ring gear is usually rusty above the oil line. I have been asked on several occasions to make a 'good' box out of several unknown boxes and often fail :).

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900i '87
900 Turbo '82
99 GL '83 Turbo Killer
99 EMS '77
Lancer EVO 6.5 TME '00


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PostPosted: Thu Sep 07, 2017 9:05 pm 
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Saab Nut

Joined: Mon Oct 16, 2006 8:17 pm
Posts: 1228
Location: Lincoln
Car Model: 9-5 estate 900 8v 95 van
saab surfer wrote:
How does the wear in the input shaft manifest itself?

There is an indentation just in front of the release bearing. Quite marked on one gearbox,less so on the other. It may be one of those occasions where we choose one and give it a go. Some oilcame out of the freewheel mechanism hole when I was cleaning the case of one and it was very clean. I'll have a look and keep you posted. Thanks for the ideas.


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PostPosted: Fri Sep 08, 2017 2:57 pm 
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Saab Nut

Joined: Thu Nov 11, 2010 12:26 pm
Posts: 1472
Like Dave says. If you swap the bell housing you can see the condition of the ring and pinion and measure the clearance of the C+P to gauge pinion bearing wear. Also if you remove the back cover you will probably find the Pinion shaft nut loose from the bearing wearing.


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