Grease for transmission joints

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Charles C. - 11 Jul 2006 09:03 GMT

Hi,

I will be removing the drive shafts of my 9k (1997) to replace the CV
joint boots/gaiters (not split yet).

From memory Castrol MS3 was the best alternative grease for the constant
velocity joint. Is it the same grease for the inner joint (tripod to
inner shaft joint)?

On a similar note, how much play should there be between tripod and
inboard shaft (CV flange)? Any none at all? With the car jacked up I
can rotate the wheel by 1/2 to 3/4 of an inch and get a nice click sound
as the tripod moves from side to side inside the flange.

TIA for any advice.
Charles

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yaofeng - 13 Jul 2006 01:17 GMT

> Hi,
>
[quoted text clipped - 12 lines]
> TIA for any advice.
> Charles

I have never touched the CV joint. But did the drive shaft removal and
separation many, many times on four 9k's I own/ed. The CV joint grease
is the same as that for the drive flange I think. I just picked them
up at the auto parts store. What I am currently using is the Mobile
synthetic grease. Not because it is Mobile, or synthetic. I just
happened to spot it on the shelf.

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Craig's Saab C9000 Site - 14 Jul 2006 06:35 GMT

>I will be removing the drive shafts of my 9k (1997) to replace the CV
>joint boots/gaiters (not split yet).

>From memory Castrol MS3 was the best alternative grease for the constant
>velocity joint. Is it the same grease for the inner joint (tripod to
>inner shaft joint)?

The grease used in the inner and outer CV's is some sort of Molybdenum
suspension grease. I presume that's what the 'MS' in the Castrol produce
code means.

>On a similar note, how much play should there be between tripod and
>inboard shaft (CV flange)? Any none at all? With the car jacked up I
>can rotate the wheel by 1/2 to 3/4 of an inch and get a nice click sound
>as the tripod moves from side to side inside the flange.

That's probably quite ok. My 1985 900i could have the front wheels turned
about 1/8 to 1/4 or a turn which is one of the ways I found the problem it
had with handbrake maladjustment.

I'd assume that the 9000's would have some small degree of play in the CV's
too.

Craig.

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