AeroNautical Posted November 19, 2013 Share Posted November 19, 2013 Bit of back story: SWB, just did an SOA 8.25 swap from d35, put in ax15 and 231, and cut driveshaft accordingly. I'm getting a loud whirring noise at about 25-30MPH with small vibrations. I put in XJ shackles to lower the back a bit until I can finish the front, I know doing so lowered the pinion angle a bit too. I don't get it accelerating or decelerating, just at that steady speed. Having installed so much at once, it could be a number of things, but I'm pretty certain it's the pinion. I've been looking at angle shims until I can get the MJ shackles back in. Your thoughts? Link to comment Share on other sites More sharing options...
87Warrior Posted November 19, 2013 Share Posted November 19, 2013 Time to break out the angle finder to see what is really going on. Report back with the t-case output angle and pinion angle.... They should be the same with a two joint shaft. Link to comment Share on other sites More sharing options...
mvusse Posted November 19, 2013 Share Posted November 19, 2013 Actually, pinion should be a couple degrees lower so they run parallel under load. Link to comment Share on other sites More sharing options...
carnuck Posted November 20, 2013 Share Posted November 20, 2013 Angle shims are easy to find but your noise may be from the lower oil in the diff unless you jacked up the back so the pinion was level when you filled it. Was the driveshaft in synch front to back when assembled? (they need to be mirror imaged) Link to comment Share on other sites More sharing options...
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