Dwayne_The_Rock_Datsun Posted April 17, 2020 Share Posted April 17, 2020 Upgrading to a R200 short nose VLSD (90 300ZX NA) in my 78 280z 4 speed and can not seem to find any INFO on draft shaft length needed to make up for the short DIFF. I know it's been done before so any help would be nice. Trying to get all the parts here before I do the swap. Quote Link to comment Share on other sites More sharing options...
Ironhead Posted April 17, 2020 Share Posted April 17, 2020 I think it's because there are so many variables... I have the sort nose R200, but also an LS3 and T56. Even with that specific engine/tranny combination, driveshaft length will still vary depending on what engine mounts are used. If your car is completely stock except for the diff, someone might have measurements for you. But it does seem like the safest approach would be to mock everything up and take measurements. Most places that make custom shafts move pretty quickly. Quote Link to comment Share on other sites More sharing options...
NewZed Posted April 17, 2020 Share Posted April 17, 2020 7 hours ago, Dwayne_The_Rock_Datsun said: Upgrading to a R200 short nose VLSD (90 300ZX NA) in my 78 280z 4 speed You could take some measurements. If you don't have the short nose ask someone out here to measure a short nose. If you're buying a short nose mounting kit the kit maker should have the number for you. If you're building your own mounts, make sure to read all of the threads about problems with mounting the short nose. They tend to tear out the old mounting holes due to the increased leverage. Lengthening the dirveshaft is the least of your potential problems. Quote Link to comment Share on other sites More sharing options...
Dwayne_The_Rock_Datsun Posted April 17, 2020 Author Share Posted April 17, 2020 I do have the short nose just not installed yet. I have a T3 power cradle to support the DIFF. Measuring will probably be the quickest solution. Thanks Quote Link to comment Share on other sites More sharing options...
Dwayne_The_Rock_Datsun Posted April 17, 2020 Author Share Posted April 17, 2020 4 hours ago, Ironhead said: I think it's because there are so many variables... I have the sort nose R200, but also an LS3 and T56. Even with that specific engine/tranny combination, driveshaft length will still vary depending on what engine mounts are used. If your car is completely stock except for the diff, someone might have measurements for you. But it does seem like the safest approach would be to mock everything up and take measurements. Most places that make custom shafts move pretty quickly. Ultimately the goal is to go with a LS6 T56 but for now I just want to cruise. Measuring would probably be the quickest way. Thanks Quote Link to comment Share on other sites More sharing options...
NewZed Posted April 17, 2020 Share Posted April 17, 2020 If you want to save some money you might find that a 2+2 propeller shaft from a 300ZX can be cut down. Instead of having a custom shaft made. Just a thought. Propeller shaft dimensions are in the FSM's or available through Nissan. Quote Link to comment Share on other sites More sharing options...
Dwayne_The_Rock_Datsun Posted April 17, 2020 Author Share Posted April 17, 2020 Awesome thank you! Quote Link to comment Share on other sites More sharing options...
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