Yes. Both gears are pressed on so with the engine in the vehicle they're a little hard to change. The steel crankshaft gear doesn't show as much wear as the cam gear, but replacing them as a set is considered to be the best practice. The fiber gear usually breaks as it's being removed, leaving the steel hub on the cam. Use a big chisel and a hammer to split the hub over the Woodruff key, and it will slip off easily. The crankshaft gear can usually be removed with a 2-jaw puller in one piece. Reinstall the crank gear with a big hammer and a pipe nipple, being sure the timing dot is facing forward. Heating the cam gear to about 250 degrees in a toaster oven will make it slip onto the cam a lot easier, but be sure to remove the fuel pump and have a helper hold the cam forward with a pry bar as you drive the heated gear on, also being sure the timing dot is aligned with the crank gear as it goes on. Work quickly before the gear cools off, and be sure to handle the gear with welding gloves to avoid burning your hands. If you don't hold the cam forward you could damage the valve lifters, the cam lobes, or knock the soft plug out of the rear of the block behind the cam, requiring the engine and the bellhousing to be removed to reinstall it. Have fun!
Jerry
