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TECHNICAL MOTOBRICK WRENCHING In Remembrance of Inge K. => The Motobrick Workshop => Topic started by: lilau3 on March 09, 2018, 07:13:08 PM

Title: Rate My Splines
Post by: lilau3 on March 09, 2018, 07:13:08 PM

Hi Motobrickers,

So I dropped the final drive off today to check out the condition of the splines.

Everything seemed to be covered in a fine layer of red grease but it was probably fairly dry.

Is the red stuff BMW origonal?

How would you rate the condition of these splines?

Images attached.

Thanks in advance.

Title: Re: Rate My Splines
Post by: The Mighty Gryphon on March 09, 2018, 07:22:12 PM

Those pictures look pretty good to me.  What I look for is a nice wide flat spot at the top of the spline, on both parts.  A nice sharp corner at the edge of the flat is also nice.

As the splines wear, the flat at the top gets narrower, and the banging between the parts rounds off the edge.  You need to clean them good to get a good view of what is going on.

Title: Re: Rate My Splines
Post by: lilau3 on March 09, 2018, 08:35:23 PM

And here is the spline from the transmission. Is that groove normal?(https://uploads.tapatalk-cdn.com/20180310/980abfdf71034dbeb8f3465c97f837f0.jpg)


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Title: Re: Rate My Splines
Post by: Laitch on March 09, 2018, 09:07:12 PM

Quote from: lilau3 on March 09, 2018, 08:35:23 PM

And here is the spline from the transmission. Is that groove normal?

The groove is normal. A snap ring inside the driveshaft u-joint fits into that groove to hold the driveshaft to the output shaft.

Title: Re: Rate My Splines
Post by: lilau3 on March 09, 2018, 10:28:37 PM

Quote from: Laitch on March 09, 2018, 09:07:12 PM

The groove is normal. A snap ring inside the driveshaft u-joint fits into that groove to hold the driveshaft to the output shaft.

Really! I didn’t remove any snap ring to pull the driveshaft off.


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Title: Re: Rate My Splines
Post by: The Mighty Gryphon on March 09, 2018, 10:31:34 PM

The ring is inside the spline on the u-joint.  It stays in there when you pull the shaft. 

When you pulled the shaft off the transmission output spline you did feel resistance didn't you?

Title: Re: Rate My Splines
Post by: lilau3 on March 09, 2018, 10:43:20 PM

Quote from: The Mighty Gryphon on March 09, 2018, 10:31:34 PM

The ring is inside the spline on the u-joint.  It stays in there when you pull the shaft. 

When you pulled the shaft off the transmission output spline you did feel resistance didn't you?

Yes I did. I levered it off.


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Title: Re: Rate My Splines
Post by: blackie1 on March 10, 2018, 12:40:58 AM

ooh nice splines
how many km's on the clock?

Title: Re: Rate My Splines
Post by: lilau3 on March 10, 2018, 03:30:21 AM

Quote from: blackie1 on March 10, 2018, 12:40:58 AM

ooh nice splines
how many km's on the clock?

65,000kms supposedly.


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Title: Re: Rate My Splines
Post by: billday on March 11, 2018, 10:09:17 AM

The ones from about 10 o'clock to 2 o'clock look suspect to me, but maybe it's the lighting or residual grease.

Best way to photograph splines is looking straight down them.

http://www.motobrick.com/index.php?action=dlattach;topic=10928.0;attach=62313;image