LSD

[Pumaking]

hey guys I have a 1990 240sx hatch with ABS, no HICAS plan on getting CA18DET within a month anyways I was wondering which other cars can I use a LSD from for my car. I read the thread about the guy who got the lsd for $35 at a junkyard from a J30 which at the time didnt know wtf a J30 was until I researched and found out it was a Infiniti so I was wondering which other cars and years am I able to find a LSD at a junkyard. I got to U-pull-it at Davie, FL and M&L Wreacking next to U-Pull-it.

[Dookie]

Search is your best friend, but I believe a 94-96 j30 LSD fits with no modifications, Im not exactly sure on it

[c-rad]

'97 SHOULD fit too. That's what I've got. Haven't put it in yet but physically it is the same as the others and has the 6-bolt output shafts. There was some discrepancy about the gearing but I verified it was 3.916 by doing 39 rotations of the driveshaft and the output shafts spun as close to 10 as I can tell with the unaided eye.

[float_6969]

Remember that the stock gear ratio is 4.083 so if you go to a 3.916 you may get better gas mileage and a higher top speed, but it will slow your car down. Your speedometer will also be off too.

[c-rad]

http://www.courtesyparts.com/nms/s13/s13_4.html

That's what the speedometer pinions are for 3.916 will have a negligible effect on performance. It's only 4% taller. Still won't make 1st gear usable...

[float_6969]

Thats true. not hard to do either. I actually ended up using the CA speed sensor and the KA gear because my KA speed sensor wires were torn up. I also had the lower CA harness though too...

[Pumaking]

sorry to sound like a noob but all this gear ratio and pinion stuff kind of confuses me. Also if I got a LSD with that 3.916 ratio what exactly needs to be done and how come I wouldnt be able to use 1st gear? Also are there any other Infiniti's and Nissans that I take a LSD from possibly a G20 if a LSD from that even exist?

[float_6969]

To use the 3.916 from a J30, you don't have to do anything. To get the speedo to read correctly you'll have to change the gear to one with a different number of teeth on the speed sensor. You can still use first. He was just saying that it wasn't very tall and that it doesn't do much for you. It' geared low. Please search for the last question as it's been answered plenty of times. Try the http://www.240sx.org site for a start...

[r34 gtr]

sorry to ruin your link and evil plan to get him to search, but im bored and thus, i must respond. you can use a differential from the 300zx if you get the axle shafts as well as the differential and output shafts, as it has some wierd bolt pattern on the half shafts that wont work with the 240sx axles. you can of course use the j30 rear end. other than that i wouldnt chance it and would just get a s13, 14, or 15 differential. if you get the s15 differential though, youll need the output shafts as well. you can get them at jspec.com if you are so bold as to go with the s15 unit.

jut for reference, the gear ratios of some of the different differentials is:s13 -vlsd- 4.08, 4.36 s14 -vlsd- 4.08, 3.69 (?)s15 -helical- ??j30 -vlsd- 3.916z32 -vlsd- 4.08, 3.69 (tt)

- tim

[Pumaking]

awesome you rock dude thanks for the info, unfortunatly I cant find any LSD 240sx in my area but I'm pretty sure the J30 and 300zx I could probably find.

[Pumaking]

R34 GTR I'm intrigued about this S15 HLSD, and looks like I found one in my price range, but it doesnt come in a housing just the differential itself, now it says I would have to modify my stock differential housing a litte what kind of modifing like grinding, drilling? Also went onto the Jspec site found the shafts will these fit into my stock differential housing and will it bolt to my axels? Seems like the bolt pattern is kind of weird Here are some pics.

[r34 gtr]

ive never heard of someone using the s15 diff, though i really wanted to find one. im not quite sure what needs to be modified for it to fit, but it doesnt look like it would be too hard a job. the output shafts look like theyre right on the money, so i dont see any mounting problems.. watch out for those jspec guys though, they might want a fortune for those things. i would check the price before you do anything.

- tim

[Pumaking]

those numbers on the box is that a parts number? cause if Jspec charges a butt load for them and give a Nissan dealership the parts number to order one they might be cheaper to go through them possibly from than Jspec. But I'll give Jspec an email see whats up cause if its more than what I would like to pay I'll scrap the idea.

[Pumaking]

ive never heard of someone using the s15 diff, though i really wanted to find one. im not quite sure what needs to be modified for it to fit, but it doesnt look like it would be too hard a job. the output shafts look like theyre right on the money, so i dont see any mounting problems.. watch out for those jspec guys though, they might want a fortune for those things. i would check the price before you do anything.

- tim

I did a google search for S15 HLSD and found this thread.

http://forums.freshalloy.com/u...art=1

[Turbogixxer]

those numbers on the box is that a parts number?

Yes. A nissan dealership may not have them in their system if it was not offered in the US. Call a dealership and ask them.

[biosehnsucht]

All you should need is the HLSD unit itself (the big peice in the pics), and the proper output shafts for it. I'm not sure if any US shafts fit, I think you need the S15 ones.

The other pats are just normal bearings (the circle things) that are same for all R200's I htink and the ring gear you can swap from your existing pumpkin.. the rest is just your normal pumpkin.

I want a HLSD too, but $$$

[Pumaking]

do you happen to know what the gear ratio of the S15 HLSD is, GTR helped me alot with the info on the gear ratio but didnt know what the HLSD ratio was.

[biosehnsucht]

the ratio comes from the ring gear, or maybe its the ring AND pinion gears.. I forget. the HLSD itself doesn't change the ratio but if you change the whole unit it might.

As for what ratio a whole S15 pumpkin has, not sure off hand..

[Pumaking]

yup found the answer on zilvia.net the ratio is the same just like you said depending on the ring and pinion. All I gotta do now is come up with the cash.