Randell Jesup wrote
>>The real attribute needed in gearcase oil, though, is a "high pressure"
>>rating. The designations sometimes include a HP or some other
>>notation to indicate that the oil is formulated (with additives?) to
>>maintain a film under the very high pressures generated when one gear
>>tooth rolls over another (almost zero contact area, with a high
> HP stands for Hypoid. Hypoid oils (for use with hypoid-mesh gears,
>such as in a differential) use a sulfer compound. I vaguely remember
>hearing that this might attack some of the components in some transmissions.
>(synchros?)
I stand corrected; as John W. earlier pointed out, the designation I was
searching the failing memory chips for was "EP" (extreme pressure).
"Winter" is correct.
---------------------------
Name: Ray W. James
Texas Transportation Institute
Civil Engineering Department, Texas A&M University
E-mail: Ray James <rwj4123@sigma.tamu.edu>
Date: 10/28/94
Time: 07:41:07
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