68Datsun510 Posted July 16, 2018 Report Share Posted July 16, 2018 Hey all, yesterday I measured for a driveshaft shortening on my 510/VG30/71C trans swap. Per the driveshaft shop, I was to measure from the diff flange, to the center of the universal joint with the output yoke bottomed out on the back of the trans, then subtract 1/2" to allow for installation, flex, etc. I came up with a measurement of 36.125" with the .5" subtracted. After the fact, i realized the yoke in the trans was from a Z31 driveshaft, not the 510 one. Do I need to remeasure with the 510 D/S yoke in there? or is there any "known" difference in measurements? Sudden thoughts at 3am at work on Monday...ugh! Quote Link to comment
datzenmike Posted July 16, 2018 Report Share Posted July 16, 2018 Well you never know. I moved some things around and the driveshaft was moved away from the transmission so I used a longer spline to be sure it had good depth. . 1 Quote Link to comment
68Datsun510 Posted July 17, 2018 Author Report Share Posted July 17, 2018 Made it back to the shop and measured, 48mm from the bottom out surface to center of u joint on the 300zx yoke, 36mm on the 510 one. Quote Link to comment
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