manimal Posted November 30, 2009 Share Posted November 30, 2009 Ok, after some searching I have a few questions about a rear disc brake swap. I have a 1988 Comanche 2wd. I just aquired a '97 C8.25 w/ trac-loc and 3.55 gears. I want to instwall rear disc brakes from a ZJ and upgrade the M/C and booster. Do I need to change out the prop valve for the disc brakes? One more question, has anyone ever used a hydroboost froma Chevy Astro van? If so, any tips? Thanks and BTW my name is Lance and I am from SoCal. -Lance Link to comment Share on other sites More sharing options...
manimal Posted November 30, 2009 Author Share Posted November 30, 2009 .....I am also converting it to 4wd w/ AX15 and NP231 and want to run 31's. -Lance Link to comment Share on other sites More sharing options...
Pete M Posted November 30, 2009 Share Posted November 30, 2009 Sounds like a sweet project. :thumbsup: Welcome to the club! Opinions vary as to what prop valve should be used. Personally I'd go with the prop valve from a vehicle that had disks in it and do away with the height sensing valve in the rear of the MJ. Also, be sure to start a blog about your truck in the projects forum. and post lots of photos. :D Link to comment Share on other sites More sharing options...
johnnyc Posted November 30, 2009 Share Posted November 30, 2009 Where in SoCal? It's a big place. I've got Explorer rear discs on my D44. And a WJ brake booster and master. Haven't swapped out the prop valve yet, but I have one from a 4-disc ZJ in my toolbox. My buddy actually pulled an Astro hydroboost unit from the junkyard. He was planning to swap it into his XJ, but never got around to it. Oh, if you want a Dana 44 for your MJ, there's one in the Pick-a-Part yard on Beach Blvd. in Stanton. Link to comment Share on other sites More sharing options...
manimal Posted December 1, 2009 Author Share Posted December 1, 2009 Thanks Pete. Johnny, I've actually got a 44 from an XJ,but THANKS just the same. I live in Cherry Valley...15 miles east of Redlands on the 10fwy. Link to comment Share on other sites More sharing options...
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