Transmission composition

Abstract

There is provided a transmission composition including a lead corrosion reducing effective amount of at least one lead corrosion inhibitor selected from the group consisting of sulfurized alkylphenols; phosphosulfurized hydrocarbons; substituted or unsubstituted thiocarbamates; substituted or unsubstituted thiazoles; substituted or unsubstituted triazoles; substituted or unsubstituted thiadiazoles.

1 . A transmission fluid composition comprising a lead corrosion reducing effective amount of at least one lead corrosion inhibitor selected from the group consisting of sulfurized alkylphenols; phosphosulfurized hydrocarbons; substituted or unsubstituted thiocarbamates; substituted or unsubstituted thiazoles; substituted or unsubstituted triazoles; substituted or unsubstituted thiadiazoles.  
     
     
         2 . The transmission fluid composition according to  claim 1 , wherein the at least one lead corrosion inhibitor is present in the composition in an amount ranging from about 0.01% to about 5% by weight relative to the total weight of the composition.  
     
     
         3 . The transmission fluid composition according to  claim 1 , wherein the at least one lead corrosion inhibitor is present in the composition in an amount ranging from about 0.05% to about 3% by weight relative to the total weight of the composition.  
     
     
         4 . The transmission fluid composition according to  claim 1 , wherein the at least one lead corrosion inhibitor is present in the composition in an amount ranging from about 0.2% to about 1% by weight relative to the total weight of the composition.  
     
     
         5 . The transmission fluid composition according to  claim 1 , wherein the composition is selected from the group consisting of automatic transmission fluids, continuously variable transmission fluids, manual transmission fluids, and fluids used in dual clutch transmissions.  
     
     
         6 . The transmission fluid composition according to  claim 1 , wherein the at least one lead corrosion inhibitor is selected from the group consisting of dimercapto-1,3,4-thiadiazoles, 2-mercaptobenzothiazoles, and dithiocarbamates.  
     
     
         7 . The transmission fluid composition according to  claim 1 , further comprising at least one overbased alkaline-earth metal phenate.  
     
     
         8 . The transmission fluid composition according to  claim 7 , wherein the at least one overbased alkaline-earth metal phenate is present in the composition in an amount ranging from about 0.01% to about 5% by weight relative to the total weight of the composition.  
     
     
         9 . The transmission fluid composition according to  claim 7 , wherein the at least one overbased alkaline-earth metal phenate is present in the composition in an amount ranging from about 0.04% to about 3% by weight relative to the total weight of the composition.  
     
     
         10 . The transmission fluid composition according to  claim 7 , wherein the composition passes an aluminum beaker oxidation test with a percent weight loss of a lead coupon of less than or equal to 3%.  
     
     
         11 . The transmission fluid composition according to  claim 7 , wherein the at least one overbased alkaline-earth metal phenate is a calcium phenate.  
     
     
         12 . The transmission fluid composition according to  claim 7 , wherein the at least one overbased alkaline-earth metal phenate has a TBN ranging from about 150 to about 450.  
     
     
         13 . The transmission fluid composition according to  claim 7 , wherein the at least one overbased alkaline-earth metal phenate has a TBN ranging from about 25 to about 150.  
     
     
         14 . The transmission fluid composition according to  claim 1 , further comprising at least one additive selected from the group consisting of dispersants, detergents, antioxidants, carrier fluids, metal deactivators, dyes, markers, corrosion inhibitors, biocides, antistatic additives, drag-reducing agents, demulsifiers, dehazers, anti-icing additives, anti-knock additives, anti-valve-seat recession additives, lubricity additives, combustion improvers, cold flow improvers, friction modifiers, antiwear agents, antifoam agents, viscosity index improvers, antirust additives, seal swell agents, metal deactivators, and air expulsion additives.  
     
     
         15 . A vehicle comprising a transmission, the transmission including the transmission fluid composition according to  claim 1 .  
     
     
         16 . The vehicle according to  claim 15 , further comprising at least one lead part.  
     
     
         17 . A method for inhibiting lead corrosion of machinery comprising providing to machinery a fluid composition comprising at least one lead corrosion inhibitor selected from the group consisting of sulfurized alkylphenols; phosphosulfurized hydrocarbons; substituted or unsubstituted thiocarbamates; substituted or unsubstituted thiazoles; substituted or unsubstituted triazoles; substituted or unsubstituted thiadiazoles.  
     
     
         18 . The method according to  claim 17 , wherein the fluid composition is provided to an engine.  
     
     
         19 . The method according to  claim 17 , wherein the fluid composition is provided in a transmission.  
     
     
         20 . A composition comprising at least one lead corrosion inhibitor, wherein the composition meets the standards for an aluminum beaker oxidation test measuring a percent weight loss of a lead coupon.  
     
     
         21 . The composition according to  claim 20 , wherein the percent weight loss of a lead coupon is less than or equal to 3%.  
     
     
         22 . The composition according to  claim 20 , wherein the percent weight loss of a lead coupon is less than or equal to 2%.  
     
     
         23 . A vehicle comprising the composition according to  claim 20 .  
     
     
         24 . An automatic transmission comprising the composition according to  claim 20.