240hoke Posted June 15, 2003 Share Posted June 15, 2003 I have an 3.7 LSD from an 88 300zx. Anyway i started cleaning it up today and under all the grime i found an orange "viscous LSD" sticker. I already had all my parts together so i am kinda pissed. How can i bee sure its definitly a viscous LSD. In the below post someone mentioned that you could look clear through a clutch type LSD. I can on mine. If it helps i have posted pictures showing all marking on the diffy. http://www.geocities.com/datsun260zt/LSD -Austin Quote Link to comment Share on other sites More sharing options...
PETEW Posted June 15, 2003 Share Posted June 15, 2003 I hate to break it to you but that looks like a viscous type to me. I am the guy who just bought the clutch type (under the other post) and the hole I have is much bigger (signifying that it is a clutch type). According to Dave These pictures are of a R200LSD with clutches (What you want) http://12.224.138.77:8884/files/datsun/Diff/lsdside3.jpg http://12.224.138.77:8884/files/datsun/Diff/lsdside1.jpg This is a Viscious R200LSD (notice the much smaller hole) http://12.224.138.77:8884/files/datsun/Diff/viscousside.jpg Sorry about the bad news, but you can still use the diff. There are a bunch of guys using them, and loving them. You'll just need to get a few more pieces to put it in the car. Just do a search and you'll find the info you'll need. Good luck. Quote Link to comment Share on other sites More sharing options...
RB26powered74zcar Posted June 15, 2003 Share Posted June 15, 2003 Yep, you got yourself a 88 VLSD thair... Do you have the all important matching axles to go with it... Quote Link to comment Share on other sites More sharing options...
Guest 240hybrid Posted June 15, 2003 Share Posted June 15, 2003 I could be wrong but from my knowledge you can still use the viscous LSD in your Z if you have the CVs to go with it. Their splines are unique to that specific diff. and cant be swapped with any others. All the other stuff should bolt right in with no problem. Oh yeah you'll need a modified rear crossmember that keeps the control arms together to fit the finned cover or a standard unfinned rear cover to make it work with the stock crossmember. Someone else will chime in if there are other reasons not to used a viscous. Quote Link to comment Share on other sites More sharing options...
240hoke Posted June 15, 2003 Author Share Posted June 15, 2003 I was afraid of this. I dont have the splines CV's or anything. I was planning on useing the standard u-joint with 280z halfshafts. But thats out the window. I have already made the crossmember to allow for the finned cover. Whats a set of CV's and adaptors gonna run me? Do any of you guys have a set? -Austin Quote Link to comment Share on other sites More sharing options...
RB26powered74zcar Posted June 15, 2003 Share Posted June 15, 2003 I had a set modded last month with the help of James (240 Turbo) and they were lost in the mail for three weeks and I thought they were a gonner. I tried for two weeks to find a pair of the VLSD axels, and they are no where to be found, ( at least I couldn't find any) except brand new. If thats the route you think you want to take, bend over.. they are around $500 apeice.... cough.. Mine did end up showing up, thank God... I sent you a PM Good luck joel Quote Link to comment Share on other sites More sharing options...
240Z Turbo Posted June 16, 2003 Share Posted June 16, 2003 I will buy it from you. I can always use a spare. I have one spare already. Quote Link to comment Share on other sites More sharing options...
Guest cowboy6280 Posted June 24, 2003 Share Posted June 24, 2003 what are the pros and cons on viscous vs clutch type? is this more a personal preference thing or is one generally better to have over the other? thanks Quote Link to comment Share on other sites More sharing options...
PETEW Posted June 25, 2003 Share Posted June 25, 2003 The real difference, as far as most guys are concerned, is ease of installment. The clutch type can use 280 shafts while the viscous is a little more challenging. It requires us of eagle premier (I think its the premier) shafts from a v6 car. There is a good article on it on 240Z Turbos sight. I think someone went over it on Hybrid Z, as well. As far as performance I think you would do well with either. Quote Link to comment Share on other sites More sharing options...
CU Zcar Posted June 26, 2003 Share Posted June 26, 2003 Most people's gripe with viscous units (in terms of operation) is that you have to get a wheel spinning before the differential will begin to transfer power to both wheels, whereas a clutch-type unit essentially starts out powering both wheels and lets one go when the difference in torque between the two wheels meets the clutch pack's preload value. At least that's how I understand it (viscous information coming from Miata and DSM AWD owners, clutch pack info coming from my memory of reading posts/websites on the matter)...correct if I'm wrong! Quote Link to comment Share on other sites More sharing options...
evildky Posted June 27, 2003 Share Posted June 27, 2003 that washer in the middle is what prevents you from using standard output chafts, I know lot of people will cringe when I say this but I am running a viscous unit in my 71, I cut about a 1/4 inch off of one of one of the output shafts, there are no c'clips holding my output shafts in place just the halfshafts, it launches great when dragging and gives nice throttle steer when autocrossing, cutting down a shaft might not be the best way but it works, and I only paid $100 for mone, hope you got a deal to make it worth the extra effort Quote Link to comment Share on other sites More sharing options...
240hoke Posted June 27, 2003 Author Share Posted June 27, 2003 wow thatrs. interesting. So it doesn't interfer with how the LSd works at all? If everything works fine i dont see why that would be a bad idea. What are other people ideas on this? -Austin Quote Link to comment Share on other sites More sharing options...
RB26powered74zcar Posted June 27, 2003 Share Posted June 27, 2003 Seems to me that during rear wheel travel, (up & down) the halfshafts expand and retract, and they would be popping in and out of the diff. Not to mention gear oil sling..... I could very well be dead wrong here, but thats what I'd be concerned with. Quote Link to comment Share on other sites More sharing options...
evildky Posted June 28, 2003 Share Posted June 28, 2003 I have not had any problems yet, the car is not a daily driver, it was in the Grassroots Motorsports $2003 challange and can even be seen in the latest issue of their mag, although it was slow and the carbs decided they were against me, the only leakage I get is from my leaking front diff seal when I leave the rear end up on jack stands for a while, the lsd works find and the shafts have such a limited range of motion they have yet to move out that I could tell, even if they did there is only so much room to move, it's been down the drag strip at Gainesville as well as an autocross held in their drivers training mini road course, as well as 4 local autocross events, like I said might not be the right way but it worked and it was cheap Quote Link to comment Share on other sites More sharing options...
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