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Tech & Fab
SOA pinion angle w/CV driveshaft
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<blockquote data-quote="jimijam19K" data-source="post: 1166072" data-attributes="member: 18190"><p>I'm still new to this board so let me fill you in somewhat on my build. It's the Rig in my Sig.</p><p></p><p>83' CJ7, YJ springs, I'm going SOA and have the front done and back on the ground. I have double cardan driveshafts from two different FSJs that will be filling duty as rear driveshafts. I'm tracking on having the pinion pointing up at the t-case output. If my measurements are correct I need a 10* correction when the new perches go on. Does this sound anywhere near right, I was figuring I'd need 4-6 deg. not 10. </p><p></p><p><strong>This is what I did.</strong> With the frame on stands at <em>approximate</em> ride height I removed the tires and let the axle sag to- once again <em>approximate</em> level of new perch height. I jacked the pinion up with a bottle jack measuring the before and after angle with a mag. angle finder on the front of the yoke. Now I know I'm dealing with a couple of approximations but the heart of the question is <strong>does 10* difference sound like too much/little?</strong></p><p></p><p><strong>So here's my plan.</strong> The guy who does my welding lives 30miles from me, but I've got a partner with a 110v buzz box that I can use to tack weld the perches on at the aforementioned 10*. Once the axle is on and the weight back on the springs I'll see where I'm at with pinion angle. If it's good I'll throw it in the back of the truck and have it welded by someone way better than me. If not then I can make the adjustments I need.</p><p></p><p><strong>So lastly</strong>, anybody done a similiar build that can share how much pinion correction they used/needed. Thanks in advance of any feedback.</p></blockquote><p></p>
[QUOTE="jimijam19K, post: 1166072, member: 18190"] I'm still new to this board so let me fill you in somewhat on my build. It's the Rig in my Sig. 83' CJ7, YJ springs, I'm going SOA and have the front done and back on the ground. I have double cardan driveshafts from two different FSJs that will be filling duty as rear driveshafts. I'm tracking on having the pinion pointing up at the t-case output. If my measurements are correct I need a 10* correction when the new perches go on. Does this sound anywhere near right, I was figuring I'd need 4-6 deg. not 10. [B]This is what I did.[/B] With the frame on stands at [I]approximate[/I] ride height I removed the tires and let the axle sag to- once again [I]approximate[/I] level of new perch height. I jacked the pinion up with a bottle jack measuring the before and after angle with a mag. angle finder on the front of the yoke. Now I know I'm dealing with a couple of approximations but the heart of the question is [B]does 10* difference sound like too much/little?[/B] [B]So here's my plan.[/B] The guy who does my welding lives 30miles from me, but I've got a partner with a 110v buzz box that I can use to tack weld the perches on at the aforementioned 10*. Once the axle is on and the weight back on the springs I'll see where I'm at with pinion angle. If it's good I'll throw it in the back of the truck and have it welded by someone way better than me. If not then I can make the adjustments I need. [B]So lastly[/B], anybody done a similiar build that can share how much pinion correction they used/needed. Thanks in advance of any feedback. [/QUOTE]
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