driveline couplers mark williams makes a complete line of driveline couplers for dragster 40620 funny car drag boat pulling tractor and other applications with solid mount rear ends that require direct connection or solid splined shafts all couplers are made of 4140 aircraft alloy steel and hardened by mw s austempering heat treat process splines are broached for a slip fit while gear cutting operations are performed on special fixtures that locate on the spline pitch diameters to assure minimum total indicated run out coupler seal and/or bushing diameters are cnc ground to a smooth finish to assure proper fit and sealing of lubricants all couplers receive a protective black oxide finish for extra durability double splined solid driveshafts and the original mw quick disconnect powerglide couplers are also 40600 available for applications where the distance from the transmission to the rear end is too long for a standard male/female coupler 40000 40650 40800 40830 40950 trans couplers c
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