UOA of LE-607
03-30-2006, 06:49 AM
#22
Although this is good information, we do need to keep in mind that we have not had a rash of diff failures because of inadequate lubrication (except when the wrong lube is used). The failures have resulted when power is applied and the diff breaks before traction breaks. The diff (at least the AP1 version) is simply a marginal design for the power produced and the weight of the car.
03-30-2006, 07:02 AM
#23
Registered User
The AP1 diff is not really any more of a "marginal design for the power produced" than the AP2 diff. The only noticeable/proven change in the AP2 diff was a slightly different oil flow by design. I am unsure how/why this AP2 diff better than AP1 diff rumor perpetuates itself. 
The saving graces of the AP2 diff are the suspension and the clutch delay valve.
by the way, indymac, excellent bump/thread. I'm adding it to the oil journals as we speak.
xviper, do you have a link to your Mobil 1 UOA? Is it already in the oil journals?
The saving graces of the AP2 diff are the suspension and the clutch delay valve.
by the way, indymac, excellent bump/thread. I'm adding it to the oil journals as we speak.
xviper, do you have a link to your Mobil 1 UOA? Is it already in the oil journals?
03-30-2006, 07:36 AM
#24
Registered User
This might be a dumb question, but is the SUS viscosity good or bad? It says it should be between 71-83, and its showing up as 89.4. I'm assuming bigger is better ;D
03-30-2006, 08:07 AM
#26
Originally Posted by INDYMAC,Feb 2 2005, 06:12 PM
I apologize for not knowing how to enlarge the image.
Here is the result of a Google search where you can get one. It's great for looking at stuff like the tables in this thread.
http://www.google.com/search?sourceid=navc...ass+for+windows
03-30-2006, 08:19 AM
#28
Registered User
Thread Starter
Originally Posted by stitos2k,Mar 30 2006, 11:36 AM
This might be a dumb question, but is the SUS viscosity good or bad? It says it should be between 71-83, and its showing up as 89.4. I'm assuming bigger is better ;D
03-30-2006, 08:29 AM
#29
Originally Posted by INDYMAC,Mar 30 2006, 09:19 AM
According to Blackstone Laboratories website, SUS is one of several ways to categorize thickness of oil. It stands for Seybolt Universal Seconds. Other ways to describe it are: SAE, cSt, and ISO. Blackstone uses SUS and says it defines the thickness of the oil at the standard high temperature. An explanation for why it showed up as 89.4, outside of their normal perameters, might be that it is a straight 90W oil and the universal averages include many multi-vis lube oils. I can definitely attest to this stuff being unusually thick though.
