james750 Posted February 19, 2009 Posted February 19, 2009 Does anybody here know the measurement between the spring perches on the rear axles of our MJs? Trying to find out where I need to move the perches on the XJ axle. :cheers:
BIGMASS Posted February 19, 2009 Posted February 19, 2009 When I did mine I put it all together hanging from the springs and then centred the axle so I could set pinion angle before I welded the perches in. But my old axle is sitting in the driveway and I'll measure when I take the dog out...if I ever get dressed today!
Pete M Posted February 19, 2009 Posted February 19, 2009 My brain is telling me 42" center to center. :dunno:
BIGMASS Posted February 19, 2009 Posted February 19, 2009 I got 42 3/8, but I am measuring under the pumpkin. You could always measure from spring eye to spring eye on the rear where you can get a straight shot with the tape.
james750 Posted February 21, 2009 Author Posted February 21, 2009 Anyone have a confirmed measurement? I want to get this done right the first time so I don't have to cut and grind more than once. Thanks for the help so far!!! :wavey:
Pete M Posted February 21, 2009 Posted February 21, 2009 I'm quite certain it's 42" center to center. I'm 7 hours from my nearest MJ though so I can't go check. Make doubly sure you find the true axle centerline. I screwed that up once on my 9". :D Good thing I didn't have a welder at the time or it could have been real ugly. :shake:
Sir Sam Posted February 22, 2009 Posted February 22, 2009 When I did mine I put it all together hanging from the springs and then centred the axle so I could set pinion angle before I welded the perches in. But my old axle is sitting in the driveway and I'll measure when I take the dog out...if I ever get dressed today! I think this is really the best way to do it, get everything all bolted up, use a hammer to set pinion angle, make sure its centered, then tack the perches, drop it off, and fully weld em on. Seems safer than trying to measure out in the open.
james750 Posted February 22, 2009 Author Posted February 22, 2009 I'd like to do that but I am having a friend set up the axles as I don't have a welder. He only has a 110v welder and will have to go up to Boulder to use a 220v welder to finish burning the perches on.
Wildman Posted February 24, 2009 Posted February 24, 2009 I measured a MJ, D35 I got laying in the shop today, and came up with this - 42-3/8" c/c on the perches. From backing plate hub / to center of perch - 6-1/4" (both sides) From housing flange to center of perch - 14-1/4" drivers side , 12-11/16" Pass side.
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