Gear lubricant improving agents

Claim 1

A LIQUID, HOMOGENEOUS IMPROVING AGENT WHICH, WHEN PRESENT IN GEAR LUBRICANT COMPOSITIONS, INCREASES THE ABILITY THEREOF TO FUNCTION UNDER HIGH SPEED-SHOCK LOAD AS WELL AS HIGH TORQUE CONDITIONS OF OPERATION, CONSISTING OF THE COMBINATION OF: A. AN OIL-SOLUBLE ZINC SALT OF A DIALKYL PHOSPHORODITHIOIC ACID DI-ESTER HAVING FROM 1 TO ABOUT 40 CARBON ATOMS IN EACH ALKYL GROUP, AND B. AN OIL-SOLUBLE, SUBSTANTIALLY HYDROCARBON ORGANIC POLYSULFIDE HAVING FROM 2 TO 7 SULFUR ATOMS AND HAVING AT LEAST ONE SULFUR ATOM BONDED ONLY BY SECONDARY VALENCE BONDS SAID ORGANIC POLYSULFIDE BEING SELECTED FROM THE GROUP CONSISTING OF TURPENTINE POLYSULFIDES AND PINE OIL POLYSULFIDES, SAID COMPONENTS A AND B BEING PRESENT IN RELATIVE PROPORTIONS SUCH THAT WHEN AN ADMIXTURE THEREOF IS DISSOLVED IN A SOLVENT THEREFOR IN AN AMOUNT EQUAL TO FROM ABOUT 3.5% TO ABOUT 15% BASED ON THE WEIGHT OF THE TOTAL SOLUTION, SAID SOLUTION WILL HAVE CONTRIBUTED THERETO BY SAID COMPONENTS: (I) FROM ABOUT 0.20% TO ABOUT 0.75% PHOSPHORUS, AND (II) FROM ABOUT 0.25% TO ABOUT 1.0% OF CHEMICALLY COMBINED SULFUR WHICH IS BONDED ONLY BY SECONDARY VALENCE BONDS.