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Old 04-06-2011, 08:50 PM   #1
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Default my tranny/diff UOA, let me show you thems

In case you aren't familiar with the setup, these came my black turbo car. ~2000lbs dry, 350whp, 295wtq.

~100k mile '99 6-speed, put into service in this car ~7/2010. Approx. 15 hours on the trans/fluid in this application. I expect transmissions to last about 18 months in this car. Fluid is Amsoil 75w90 MTG GL4 - this fluid is awesome and we use it in everything.



Diff is an unknown mileage 3.909 Torsen, put into service a long time ago on this car (like 2008 sometime). The outrageous copper content is a little unnerving. This is Redline 75w250 Heavy Shockproof (helps keep the thing together during constant shock-loading due to inside rear wheelspin). I may try an Amsoil product here too after the next change in December.



For your pleasurez.
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my tranny/diff UOA, let me show you thems-march2011-diff.jpg   my tranny/diff UOA, let me show you thems-march2011-trans.jpg  
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Old 04-06-2011, 10:07 PM   #2
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Holy calcium in the diff!

Thats some very good info to share. I should send off my trans oil and diff oil off in the next 15-20k miles on my DD. It'd be interesting to see results of a street driven car like that compared to yours. I use redline 75w90 trans fluid and Mobil 1 LSD diff fluid.

My dad has a big-*** book full of UOA tests with mobil 1 when synthetics started getting bigger (can't remember the date lol) I'll have to track the book down.

Thx for the info!
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Old 04-06-2011, 10:39 PM   #3
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How much do these tests cost?
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Old 04-07-2011, 12:29 AM   #4
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Not expensive. www.blackstone-labs.com for exact rates.
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Old 04-07-2011, 02:07 AM   #5
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Andrew, switch to the Amsoil 75w90 SevereGear.(SVG) That's what I use in my Cusco clutch type diff and in Torsens. I called AMSoil right after I got the diff, 2 years ago, and spoke with an engineer. He told it was the best they had for race applications and he said it had a friction modifier in the oil, as well, which works good with the clutch type diff. I took his word for it, but don't have any conclusive data to back it up. My diff has always worked properly.

http://www.amsoil.com/storefront/svg.aspx
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Old 04-07-2011, 05:54 AM   #6
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I will pull the Shockproof in 3 months and switch to SVG. Thanks wagz.
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Old 04-07-2011, 09:01 AM   #7
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OS Giken says to use their special LSD lube, and I am. But at $45/liter - is it worth it?? I'll have to take a sample when I change for comparison next time. I didn't want to risk destroying $1500 of awesomeness.
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Old 04-07-2011, 09:03 AM   #8
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I also run the Severe Gear and contrary to popular belief, I am not a homosexual.
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Old 04-07-2011, 09:04 AM   #9
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Quote:
Originally Posted by GeneSplicer View Post
OS Giken says to use their special LSD lube, and I am. But at $45/liter - is it worth it?? I'll have to take a sample when I change for comparison next time. I didn't want to risk destroying $1500 of awesomeness.
Of course they do.
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Old 04-07-2011, 12:12 PM   #10
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Question is - will you after buying one?
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Old 04-07-2011, 12:44 PM   #11
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Their FAQ has me rolling!

http://www.blackstone-labs.com/faq.php
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Old 04-07-2011, 12:57 PM   #12
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best faq ever.
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