mj.87 Posted August 16, 2012 Share Posted August 16, 2012 I am getting ready to install a Chrysler 8.25 rear end. I have some questions about measurement and perch placement. I know that the pinion angle needs to be correct. Would -2 degrees be about right? What other measurements do I need to take into consideration besides pinion angle? Link to comment Share on other sites More sharing options...
carnuck Posted September 10, 2012 Share Posted September 10, 2012 Spring pads need to be moved inboard 1.5" per side and shock mounts added. Pinion angle should be flat unless you have a slip yoke eliminator Link to comment Share on other sites More sharing options...
mvusse Posted September 10, 2012 Share Posted September 10, 2012 Pinion angle depends on the type of drive shaft used. If it has single u joints on both ends, it should be parallel with the transfer case output, or ~2 degrees below so it will be parallel under load going down the road. If going SOA, shock mounts on the axle instead of using the stock ones on the u bolt plates are a good idea. Either way (SOA or SUA) perches will need to be cut off and new ones welded on in the correct position. Link to comment Share on other sites More sharing options...
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