I got a 1994 Grand prix (It is my fathers) and found that they cartridge is making noise when you hit a bump. I want to replace just the cartridge and was wondering how hard it is. I have been a mechanic in the af for 20 yrs and replaced just about everything but never rebuilt one. Any help would be great. I already know the spring has to be compressed. Just want to do this the cheapest way possible to keep this car on the road for a few more year.

thanks