Leith280zlt1

Drftn, thanks for the good report man. I appreciate it. As for where to get these units, Precision Gear became Reider Racing. They still have their own website but they are owned by Reider Racing. The units they sell are the LOM59-12 unit. They have the same casting numbers on them as the stock /nismo unit's out of the '87-'89 300zxt's. I recently had a stock unit and they have the same casting numbers, and the same spring pressure. When I checked a new unit, it took about 85 ft-lbs of pressure to turn the clutch disks. Pretty good, but I do think it would wind up to be a little less once the unit was well broken in. Precision Gear is out of these differentials right now. It will be at least another month before they get any new units in from Japan. And there aren't any prices on their website, you have to call to get prices.

Here's my question... I used the 280zx rear disk brakes and made my own caliiper brakets. I'm wondering if there are any upgrades to the calipers that I can just bolt on at this point? Will these brakes be good enough for road racing? Thanks guys. Great thread!

I have a used 3.7 lsd out of a 300zxt. It has the finned rear cover. One sold for 660 on ebay today. I have a few differentials here in my shop that I would be glad to swap the ls carrier onto some other gears if someone would like that better. I have two other ratios, 3.9 and 3.54 if someone is interested. Someone care to make an offer? PM me please.

Well, the one I was looking at is not a scarab sadly... I only saw it before thru the fence after hours before and it had the rear quater fenders that looked like the scarab style flares... I remembered it had a g-nose too. After taking a closer look tho, no v8.... I think I'll cry now....

Did any of the real scarab models have G-nose conversions?

Could anyone tell me how rare the scarab z's are? How much would one be worth if you found one in a junk yard?

Is it a new lsd? If the limited slip is brand new and not broken in yet I know there can be clunking and popping noises. It comes from the clutches getting ridges in them and then moving across each other. It can also develop from hard acceleration occasionally. The way to fix that problem is to do some turning to get the clutches moving against each other. Don't turn real hard, you don't want to over work the lsd. Just some slow slaloms or figure eights for about half an hour is what is best for break in or just to smooth out the clutch faces. If that has anything to do with the problem it will help. I still don't understand exactly what type of clunking you are hearing. Constantly? Just when turning?

The stubs that came out of the LSD should be the same as the stock differential. Just make sure you put them in the right sides. One of the stubs is longer than the other.

A 3.5 gear ratio means that for every 3.5 turns the driveshaft makes, the tires make one. If you have a taller gear ratio, say a 4.11, you will have more low end/takeoff power. The downside is you won't go as fast or get as good of gas mileage typically. With a taller ratio, you take off faster. With a lower gear ratio, you go faster but don't take off as fast. For drifting, I would imagine you would want the taller gear ratio because it would be easier to get the tires to break loose. Hope that helps.

I've heard of people putting the r180 in there for balancing the weight differently. Since you don't have as much breakaway torque as a big throaty engine, the stub axles should be able to handle it. Just a thought.

Mike, Gainesville is about an hour north of Dallas. It's actually the las town before Oklahoma on I35. I think I'm about 5 hours from Houston.

Thanks guys for your support. I hope no one is having any problems. I just recently put the 4.11 gears in mine and they feel absolutely awesome with the limited slip. It make such a difference. The deal is still available. What I'm doing now is a little different. I'm selling the limited slips for the same price, $602.95. I have some used differentials here that I'm selling for $120 apiece for. If you want to send me yours, I'll trade it for one that I already have rebuilt because it's easier for me. I'll sell the rebuilt ones for $60 if you decide to do a trade in. So, it's $120 straight up and $60 trade. The rebuilt ones are completely rebuilt and cleaned. I do take the pinion gear out and check all the bearings. Then I paint them either red or black with industrial high temp paint depending on what color you want. Also, if it needs new seal or if you want to put new ones on anyway, I can get those for about 15 apiece OEM or about 5 apiece generic seals depending on how much you want to try and save. I have a couple 3.9s, one 3.7, and one 3.5 right now if anyone is interested. If you want the 3.7 or the 3.5 I would like to get one back the same gear ratio on trade. We can work something out in that case. I do not have any 4.11 gears right now but I will look for some more soon. Please feel free to ask if you have any other questions. Thanks for your support and good feedback again guys.

Well, the only thing I know of that is higher is the r180 out of a datsun pickup 4x4. It was a 4.37. I have never seen a taller gear ratio in a r200 yet and if there was one I would probably have it. The tallest that came stock is the 4.11. Sorry.

Get some grade 8 bolts for it.

The only LSD nissan ever made and put on a stock car was a 3.7 out of the 87 - 89 300zxt. None of the 3.9's will have an lsd. You can install lsd's in them but you won't find one with a lsd already in it. You will definitely notice a difference with the 3.9 gears versus the 3.7's or 3.5's. Dunno what you have. If you really want a kick in the pants, get the 4.11's out of a 85 - 86 200sx turbo's. They really make a difference and it gives the car a whole new attitude. If you do find a 3.7 lsd, you can swap the carrier for the limited slip into the new gears no problem. Hope this helps.

This installation was kindof tricky because the ring gear for this R180 has a larger diameter than any other 180. The ring gear was about .2" larger than the LS carrier. What I did was make a sleeve that fit over the carrier and inside the ring gear so that it would be perfectly centered. I made it right on size because the ring gear is a 0" tolerance part. I machined a piece out of aluminum so that it had about a .010" lip underneath the ring gear so that it has no chance of comming off inside the differential and causing problems. The ring gear has a large chamfer on the inside that made this possible. So now it's pressed on and has a lip that will be underneath the bolted ring gear to keep it from ever comming loose. Here's some pictures of the process... I mounted the differential on an engine stand so that I could rotate the differential as I needed to... The old open differential carrier, new ls carrier, ring gear and sleeve... Sleeve in the ring gear... Heated the sleeve and dropped it on the carrier. Now that the sleeve is on the carrier, the ring gear will have to be heated also to fit over the sleeve. I turned the heads of some old 10mm bolts down so I could use them as guides while I dropped the ring gear on over the sleeve and carrier. That was the easiest way to make sure the bolt holes lined up... The Precision Gear unit with the ring gear torqued down. Should look great in it's housing.

Would anyone be interested in a set of rebuilt CV's? I've got some here from a 280zx.

It makes it to where both axles are locked together all the time. It's basically the same thing as putting a spool in it.

The pin will probably be twice as expensive than if you go get a junked differential and get a good carrier and put that in. It will also be twice as much work.

Call precision gear. The LS assembly they offer is an OEM part number. The same as the nismo unit.

I have an extra carrier from a busted differential if you want it. I could let you have it for about $30 if you want it. The problem with welding the gears up like you are talking about is you would be welding steel to cast iron. I don't think that will hold up to a whole lot of power. You would probably break the welds and then just have a mess. You are talking about the pin for the spider gears right?

lol, thanks mortenson, hadn't even crossed my mind

Yesterday I went to some yards in dallas and came out with 5 good differentials. I have 3 3.7's and two 3.9's if anyone is interested. I got them all for $100 apiece.

Guys, can we start a donation pool for this guy. This makes me sick to my stomach...

The Clutches will last typically forever. I have never even seen a rebuild kit being sold for the clutch packs. The clutches in the lsd's don't really move that much. The only movement they see is the difference in the speeds of the wheels around a turn. Otherwise they are locked. They really won't wear. Both the precision gear unit and the nismo unit come from the same factory in Japan. Nismo sells them more because they are "Nismo". "Authentic". Precision Gear also sells Ford 9"s and other rear ends. So, they are have to sell the same stuff the auto companies do or they won't fit right. Nismo does not make their own stuff, they have to buy it from a specialist too. This is not all speculation either, Precision Gear will tell you what company they come from. And I have to make the spacers for any diff before '84 for either one. You don't really need them but they can keep things from moving as much. I see them as "insurance". If you have questions on gear ratio's, this link should help you out alot on knowing what year model car to get a diff from. The only thing it doesn't tell you is that the 4.11 gears come out of a '85 or '86 200sxt. Hope all this helps. Gear ratios and year models