[jrelliott]

You can rebuild them yourself, but you may not get them back to proper operation without the special tools for assembly, disassembly, and inspection of the internals to insure all the passages are good and there what wear is acceptable on the butterfly's and cavities. There are people that do this professionally like John Holland in Ohio and a fellow in Colorado. They have the tools and experience to rebuild them correctly and know when parts need to be thrown away or can be salvaged. The rebuild cost use to be about $55.00 each for John Holland. There are some things I will tackle and then others send out. JMHO. Sent John 7 shocks to get 4 good ones back.