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Alter Ego Racing
Join Date: May 2002
Location: Florida
Posts: 5,553
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What is this differential from? (LSD) 910?
One of the parts on my stash. I'm sorting through my stuff getting ready to sell things in preparation for moving.
I cannot identify this diff. I had it identified as a 910 differential but I want to confirm this. Any ideas?      Thanks!
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International GT Champion; Porsche GT3 Cup Trophy Champion; Klub Sport Challenge Champion; Rolex Vintage Endurance Series Champion; PCA Club Racing Champion; National Vintage Racing Champion |
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03-13-2013, 05:48 AM
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gearhead
Join Date: Nov 2007
Location: Loverland, CO
Posts: 23,563
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Juan,
What are the bearing diameters? How about the ring gear bolt diameter? |
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03-13-2013, 06:04 AM
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Registered
Join Date: Nov 2010
Location: SoCal
Posts: 759
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That is a standard 70's coarse-spline ZF differential for 911/914/915 transmissions. The 910 used a 904 differential, with tapered housing and male flange attachments.
Photo below is same ZF number as yours... 
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Jon B. Vista, CA |
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03-13-2013, 09:37 AM
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Alter Ego Racing
Join Date: May 2002
Location: Florida
Posts: 5,553
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That's what I was afraid of. It does not look special...... Any other info on these you could share?
Back to organizing stuff. That will go into the pile with the simplified ones. Many thanks for the info John!!!!
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International GT Champion; Porsche GT3 Cup Trophy Champion; Klub Sport Challenge Champion; Rolex Vintage Endurance Series Champion; PCA Club Racing Champion; National Vintage Racing Champion |
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03-13-2013, 09:46 AM
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Registered
Join Date: Nov 2010
Location: SoCal
Posts: 759
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Quote:
You can test the clutches for release torque, as shown below. For that ZF, spec is 29-58 lbs/ft, 4-8 mkp or 40-80 Nm. 
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Jon B. Vista, CA |
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03-13-2013, 11:35 AM
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Alter Ego Racing
Join Date: May 2002
Location: Florida
Posts: 5,553
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Jon you are a great resource. THANKS!!!!!
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International GT Champion; Porsche GT3 Cup Trophy Champion; Klub Sport Challenge Champion; Rolex Vintage Endurance Series Champion; PCA Club Racing Champion; National Vintage Racing Champion |
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03-13-2013, 12:27 PM
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Registered
Join Date: Nov 2010
Location: SoCal
Posts: 759
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Matt would've told you the same thing, I just beat him to it...
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Jon B. Vista, CA |
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03-13-2013, 03:25 PM
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Alter Ego Racing
Join Date: May 2002
Location: Florida
Posts: 5,553
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Jon,
Matt is a good friend and a walking encyclopedia on all things gear train. When I first commented on the LSD he said that if I thought it could be a special unit, I had to contact you for info. I owe a lot of my success in racing to his willingness to share knowledge and the excellent products he brings to us!
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International GT Champion; Porsche GT3 Cup Trophy Champion; Klub Sport Challenge Champion; Rolex Vintage Endurance Series Champion; PCA Club Racing Champion; National Vintage Racing Champion |
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03-14-2013, 06:08 AM
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Registered
Join Date: Feb 2003
Location: Kailua, Bend, & Tamarack
Posts: 1,618
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Did you know that Matt has half-thickness plates/discs that can easily transform a 2-disc LSD into a 4 disc?
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03-14-2013, 06:25 AM
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gearhead
Join Date: Nov 2007
Location: Loverland, CO
Posts: 23,563
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Who was that masked man?
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03-14-2013, 06:26 AM
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