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A limited slip differential including a rotatable casing, a pair of axle shafts including respective ends, a pair of side gears rotatably fixed to the ends of the axle shafts, at least one pinion gear attached to the casing and meshingly engaged with the pair of side gears, a brake assembly defining

A limited slip differential including a rotatable casing, a pair of axle shafts including respective ends, a pair of side gears rotatably fixed to the ends of the axle shafts, at least one pinion gear attached to the casing and meshingly engaged with the pair of side gears, a brake assembly defining a brake chamber and including first and second brake elements disposed within the brake chamber, the first brake element superposed with the second brake element, the first brake element rotatably fixed relative to the casing, a quantity of magnetorheological fluid disposed within the brake chamber, the first and second brake elements in contact with the magnetorheological fluid, and a selectively energized source of magnetic flux, the magnetorheological fluid being exposed to the flux when the source is energized. When the magnetorheological fluid is exposed to the magnetic flux, the magnetorheological fluid is at least partially solidified and the first and second brake elements are coupled to each other through the magnetorheological fluid.

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A limited slip differential including a rotatable casing, a pair of axle shafts including respective ends, a pair of side gears rotatably fixed to the ends of the axle shafts, at least one pinion gear attached to the casing and meshingly engaged with the pair of side gears, a brake assembly defining

A limited slip differential including a rotatable casing, a pair of axle shafts including respective ends, a pair of side gears rotatably fixed to the ends of the axle shafts, at least one pinion gear attached to the casing and meshingly engaged with the pair of side gears, a brake assembly defining a brake chamber and including first and second brake elements disposed within the brake chamber, the first brake element superposed with the second brake element, the first brake element rotatably fixed relative to the casing, a quantity of magnetorheological fluid disposed within the brake chamber, the first and second brake elements in contact with the magnetorheological fluid, and a selectively energized source of magnetic flux, the magnetorheological fluid being exposed to the flux when the source is energized. When the magnetorheological fluid is exposed to the magnetic flux, the magnetorheological fluid is at least partially solidified and the first and second brake elements are coupled to each other through the magnetorheological fluid. second material. 5. The grommet assembly of claim 4 wherein the first material has a durometer of less than 90 on a Shore A hardness scale and wherein the second material has a durometer of greater than 95 on the Shore A hardness scale. 6. The grommet assembly of claim 5 wherein the first material has a durometer of between 65 and 75 on the Shore A hardness scale and the second material has a durometer of between 50 and 65 on the Shore D hardness scale. 7. The grommet assembly of claim 4 wherein the durometer of the first material is at least 10 increments below the durometer of the second material on the Shore A hardness scale. 8. The grommet assembly of claim 1 wherein each barrel has a distal end and a proximal end, wherein the first string hole of each barrel includes a large diameter portion at the proximal end of the barrel and a small diameter portion at the distal end of the barrel, and wherein the large diameter portion is sized to substantially receive one of the pegs. 9. The grommet assembly of claim 1 wherein the first grommet member is formed of a material selected from the group consisting of a natural rubber, a synthetic rubber, a urethane, an elastic polymeric material and combinations thereof. 10. The grommet assembly of claim 1 wherein the second grommet member is formed of a material selected from the group consisting of a nylon, a generally rigid polymer, a polyamide and combinations thereof. 11. A two-piece grommet assembly for a sports racquet, the sports racquet including a frame having a plurality of grommet holes and at least one racquet string, the grommet assembly comprising: a first grommet member including a first strip having a first inner surface for contacting the frame and a first outer surface, and at least two spaced-apart barrels extending generally perpendicular from the first inner surface, each barrel including a first string hole extending along a longitudinal axis of the barrel, each barrel configured to extend through a separate grommet hole in the frame; and a second grommet member including a second strip having a second inner surface and a second outer surface, and at least two spaced-apart pegs extending generally perpendicular from the second inner surface, each peg having a second string hole, the second inner surface contacting the first outer surface and the pegs extending into the barrels such that the first and second string holes are generally co-axially aligned, the first grommet member configured to substantially isolate the pegs and the second inner surface from the frame, the first and second grommet members comprising first and second materials, respectively, and the first material being softer than the second material. 12. The grommet assembly of claim 11 wherein the first material has a durometer of less than 90 on a Shore A hardness scale and wherein the second material has a durometer of greater than 95 on the Shore A hardness scale. 13. The grommet assembly of claim 12 wherein the durometer of the first material is at least 10 increments below the durometer of the second material on the Shore A hardness scale. 14. The grommet assembly of claim 12 wherein the first material has a durometer of between 65 and 75 on the Shore A hardness scale and the second material has a durometer of between 50 and 65 on the Shore D hardness scale. 15. A two-piece grommet assembly for a sports racquet, the sports racquet including a frame having a plurality of grommet holes and at least one racquet string, the grommet assembly comprising: a first grommet member including a first strip having a first inner surface for contacting the frame and a first outer surface, and at least two spaced-apart barrels extending generally perpendicular from the first inner surface, each barrel including a first string hole extending along a longitudinal axis of the barrel, each barrel configured to extend through a separate grommet hole in the frame; and a second grommet member including a se cond strip having a second inner surface and a second outer surface, and at least two spaced-apart pegs extending generally perpendicular from the second inner surface, each peg having a second string hole, the second inner surface contacting the first outer surface and the pegs extending into the barrels such that the first and second string holes are generally co-axially aligned, the first grommet member configured to substantially isolate the pegs and the second inner surface from the frame, each barrel having a distal end and a proximal end, the first string hole of each barrel including a large diameter portion at the proximal end of the barrel and a small diameter portion at the distal end of the barrel, and the large diameter portion being sized to substantially receive one of the pegs. 16. A two-piece grommet assembly for a sports racquet, the sports racquet including a frame having a plurality of grommet holes and at least one racquet string, the grommet assembly comprising: a first grommet member including a first strip having a first inner surface for contacting the frame and a first outer surface, and at least two spaced-apart barrels extending generally perpendicular from the first inner surface, each barrel including a first string hole extending along a longitudinal axis of the barrel, each barrel configured to extend through a separate grommet hole in the frame; and a second grommet member including a second strip having a second inner surface and a second outer surface, and at least two spaced-apart pegs extending generally perpendicular from the second inner surface, each peg having a second string hole, the second inner surface contacting the first outer surface and the pegs extending into the barrels such that the first and second string holes are generally co-axially aligned, the first grommet member configured to substantially isolate the pegs and the second inner surface from the frame, the first grommet member being formed of a material selected from the group consisting of a natural rubber, a synthetic rubber, a urethane, an elastic polymeric material and combinations thereof. 17. The grommet assembly of claim 16 wherein the second grommet member is formed of a material selected from the group consisting of a nylon, a generally rigid polymer, a polyamide and combinations thereof. 18. A sports racquet having at least one racquet string, the racquet comprising: a frame including a head portion with an outwardly facing surface and an inwardly facing surface that defines a generally oval stringing area, the head portion including a plurality of grommet holes, each grommet hole extending through the outwardly facing surface and the inwardly facing surface along an axis; a two-piece grommet assembly connected to the head portion, the grommet assembly including, a first member including a first strip having a first inner surface, for contacting the outwardly facing surface, and a first outer surface, and at least two spaced-apart barrels extending generally perpendicular from the first inner surface, each barrel extending through a separate grommet hole in the head portion and having a first string hole extending from a proximal end of the barrel to a distal end of the barrel, and a second grommet member including a second strip having a second inner surface and a second outer surface, and at least two spaced-apart pegs extending generally perpendicular from the second inner surface, each peg having a second string hole, the second inner surface contacting the first outer surface and the pegs extending into the barrels such that the first and second string holes are generally co-axially aligned, the first grommet member configured to substantially isolate the pegs and the second inner surface from the frame; and at least one string extending through the first and second string holes, the racquet string contacting at least a portion of the barrel of the first grommet member. 19. The sports r