c900 inner driver size change?

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Dave Hinz - 16 Jul 2006 16:12 GMT

OK, so I'm replacing the left CV/driveshaft on my '85 Saab 900. Got the
old one out without too much swearing and no blood. New one won't go
in; turns out the outer races of the 3 needle bearings are about 2mm too
large, as compared with the one that came out.

So. Obviously something changed. When? Any thoughts if they gave me
the wrong part (newer) or if my car has the wrong tranny in, or
something?

At this point, to get back on the road, I'm thinking of keeping my old
driveshaft and putting that into the new CV I got from them. Any hints
on this? I can't see the snapring I thought would be there, checking
manuals next. But I don't think I'll do anything until I get some sort
of confirmation about that part changing?

More to the point, if the part did change, I need to know when, so I can
tell 'em I have whatever year car the one I need, is really for.

Thanks,
Dave Hinz

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Charles C. - 17 Jul 2006 00:07 GMT

> OK, so I'm replacing the left CV/driveshaft on my '85 Saab 900. Got the
> old one out without too much swearing and no blood. New one won't go
[quoted text clipped - 7 lines]
> At this point, to get back on the road, I'm thinking of keeping my old
> driveshaft and putting that into the new CV I got from them.

I would replace the two tripods if I were you assuming the shaft +
splines are exactly the same.

Any hints

> on this? I can't see the snapring I thought would be there, checking
> manuals next. But I don't think I'll do anything until I get some sort
> of confirmation about that part changing?

Did you need a new cv joint or just a boot/gaiter?

> More to the point, if the part did change, I need to know when, so I can
> tell 'em I have whatever year car the one I need, is really for.

See here ... maybe of some help (not much though)
http://www.thesaabsite.com/900old/c900cvparts.htm

> Thanks,
> Dave Hinz

I have seen a photo on the web of a snapring ... I will see if I can
find it for you.

Charles

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Greg Chi - 17 Jul 2006 05:10 GMT

>> OK, so I'm replacing the left CV/driveshaft on my '85 Saab 900. Got the
>> old one out without too much swearing and no blood. New one won't go
>> in; turns out the outer races of the 3 needle bearings are about 2mm too
>> large, as compared with the one that came out.

[snip]
The '86 16vlv 5spd has the 'newer' larger tripod joint. (I believe
also the '85 turbos) The shafts are BIGGER dia. The drivers are larger
dia also. (Outer joints are identical. Inner boots are interchangable.
You just need the earlier tripod driven assy (8vlv '85 ) .
(These larger drivers are the same as the NG cars w/tripod units)

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Dave Hinz - 17 Jul 2006 16:07 GMT

>>> OK, so I'm replacing the left CV/driveshaft on my '85 Saab 900. Got the
>>> old one out without too much swearing and no blood. New one won't go
[quoted text clipped - 7 lines]
> You just need the earlier tripod driven assy (8vlv '85 ) .
> (These larger drivers are the same as the NG cars w/tripod units)

Ah, perfect. So yes, the shaft is bigger too now that you mention it.
So they gave me the turbo shaft (heh) for the year not the N/A which I
asked for. OK so it's their mistake, good to know; I'll go in for an
exchange. Doesn't matter so much whose fault it is, I'm not like that,
it's just a case of who pays or doesn't pay for the extra shipping and
restocking.

Dave Hinz

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Dave Hinz - 17 Jul 2006 16:06 GMT

>> So. Obviously something changed. When? Any thoughts if they gave me
>> the wrong part (newer) or if my car has the wrong tranny in, or
>> something?

> I would replace the two tripods if I were you assuming the shaft +
> splines are exactly the same.

Haven't checked. Just a press fit then?

> Any hints
>> on this? I can't see the snapring I thought would be there, checking
>> manuals next. But I don't think I'll do anything until I get some sort
>> of confirmation about that part changing?
>
> Did you need a new cv joint or just a boot/gaiter?

The CV is decidedly rattly.

>> More to the point, if the part did change, I need to know when, so I can
>> tell 'em I have whatever year car the one I need, is really for.

> See here ... maybe of some help (not much though)
> http://www.thesaabsite.com/900old/c900cvparts.htm

Thanks, that's more info than I had.

> I have seen a photo on the web of a snapring ... I will see if I can
> find it for you.

Well that's the thing, has to be there somewhere but I'm not seeing it.

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Charles C. - 17 Jul 2006 20:05 GMT

>>> So. Obviously something changed. When? Any thoughts if they gave me
>>> the wrong part (newer) or if my car has the wrong tranny in, or
[quoted text clipped - 25 lines]
>
> Well that's the thing, has to be there somewhere but I'm not seeing it.

Wipe all the grease of the end of the shaft that joins to the CV joint.

Link 1: http://townsendimports.com/Web/transmission_folder/driveshafts.htm

Read the above and you should find from the relevant section a link to
this page:
http://townsendimports.com/Web/transmission_folder/cvpic.htm
The circlip is marked

You need to open gently the circlip (either with thin circlip pliers by
jamming them in the gap or a screwdriver) and then tap the cv away.

I had not realised you needed a CV joint in which case going for the
complete assembly (when you get the correct one) is fair enough.

If it helps at all.

Regards
Charles

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Richard Sutherland-Smith - 17 Jul 2006 23:43 GMT

>> I have seen a photo on the web of a snapring ... I will see if I can
>> find it for you.
>
> Well that's the thing, has to be there somewhere but I'm not seeing it.

It's inside the CV joint, on the engine side, probably covered in
grease.
The tripod joint is also held on by a snap-ring (circlip?)

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Richard Sutherland-Smith
19 Webb Road, Wanganui 4500
New Zealand

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Craig's Saab C900 Site - 17 Jul 2006 10:06 GMT

>OK, so I'm replacing the left CV/driveshaft on my '85 Saab 900. Got the
>old one out without too much swearing and no blood. New one won't go
>in; turns out the outer races of the 3 needle bearings are about 2mm too
>large, as compared with the one that came out.

>So. Obviously something changed. When? Any thoughts if they gave me
>the wrong part (newer) or if my car has the wrong tranny in, or
>something?

Err yes there was a change around them. Something also with the driveshafts
being about 6 mm different in length (not sure if they were shorter or
longer).

The tripod-bearing and inner-CV change is detailed in my parts book... From
VIN G2009923 and up, G3007066 and up, and G7011598 and up the later style
inner CV, tripod bearing and from what I can make out, driveshafts, are
used.

Note that's the US printed parts manual for the classic 900's printed in
1996, so I don't know how those 'VIN' numbers correspond with the real
VIN/chassis numbers that we (at least here in Oz) use to key the car into
registration and insurance databases.

Craig.

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