Before lifting the oil pan, it is crucial to connect the cable you the negative terminal of the battery, apply the parking brakes, block the rear wheels, lift the front of the vehicle and put it on jackstands. Ring out the engine oil, if your model is equipped with a skidplate, then remove the skidplate also, and then you shall remove the final transmission-to-oil pan support brace at the tail of the pan. The transmission oil cooler line bracket has to be unbolted and for the 4WD models the front axle ought to be pulled out. Third, the through-bolts used in the engine mount can be unbolted then, using an engine hoist, one pulls up the engine to get the engine fan just brushing the fan shroud. Loosen and unscrew the bolts and nuts and pay attention to the positioning of the studs before disassembling the oil pan from the block without the use force as this might harm the sealing surfaces. If required, use a rubber mallet to gently knock the side of the oil pan so as to break sealer grip on the flange of the gasket. Lose the nut and bolt joining the oil pick up tube and windage tray, let the pick-up tube fall into the oil pan, then pick up simultaneously the pick up tube, windage tray and the oil pan. Regarding installation, one should clean the oil pan along with the removal of gasket material from the mating surfaces; in addition, bolts holes at the block must be clear, and it should be checked whether or not the oil pan flange is distorted. The oil pan gasket should also be checked for signs of wear and when damaged it should be replaced but when still intact, it can be reused. While doing the same position the oil pan toward the engine, put the pick-up tube and oil pan gasket/windage tray in the oil pan also install the new O-ring at the pick-up tube then tighten the pick-up tube- to oil pump bolt. After placing all the fasteners, it is recommended that one should tighten all the bolts in a pin-triangle-pin fashion from the centre to the end. Place the transmission-to-oil pan structural cover into position and tighten the vertically mounted bolts to a 10 in-lb, then the horizontally mounted bolts to 40 ft.-lb, then, finally, re-torque the vertically mounted bolts to 40 ft.-lb. Last it is refilling the engine with oil and replacing the filter, turning on the engine and bringing it to normal operating temp and finally check for leaks.