MoparPartsGiant.com offers the wholesale prices for genuine 2012 Jeep Grand Cherokee parts. Parts like K3 Clutch Assembly are shipped directly from authorized Mopar dealers and backed by the manufacturer's warranty. Parts fit for the following vehicle options. Engine: 6 Cyl 3.6L, 8 Cyl 5.7L, 8 Cyl 6.4L. Transmission: 5-Speed Automatic Transmission, 6-Speed Automatic Transmission.