Crack!

[coupe72001]

Err... In an uncharacteristic display of bravado I decided to do some burnouts in the mud at my friends country property. Fun and games for about 60 seconds, then with the front wheels at full lock I put the boot in and something went crack in the drivetrain. Pulling up in a straight line it continued to go crack-crack-crack till she came to rest.

Im running a R180 LSD and a 280zx diskbrake rear-end. Im going to dig up a standard R180 diff to get me home then see what I have done to my poor LSD. Any theories? Diff centre? Axle? I read somewhere something about the inside wheel hopping when you go full-lock with a r180 but am not sure where, nor if this would cause such destruction.

I recently also split my harmonic balancer causing all kinds of noisy messy strife under the bonnet, for those who enjoy keeping tabs on how many things I manage to blow up on my car.

I did fit the disk brake rear end all by myself though, so as a mechanical retard Im feeling pretty good about that.

D

[coupe72001]

Having pulled apart the diff it turns out that I have shattered the plate that bolts onto the lefthand side of the crown wheel (the side without teeth obviously) inside the diff.

Does anyone know if this plate the same for LSD and non-LSD models? I think it is held to the crown wheel by 5 bolts. The rest of the diff looks unharmed, so if I can save it Ill be thrilled. Its an R180 LSD 4.9:1.

Thanks!

[coupe72001]

Further investigation reveals that I DO need a new diff centre - the plate that I busted is connected to the guts of the LSD. Have been sniffing around on the web and found this:

http://members.optushome.com.au/amaxeng/five10/diff.htm

but at $1450 I think I am going to cry. If anyone knows of a less excrutiating option please let me know.

Thanks

Drew

[Factory 5]

buy the R180 open spinner diff from my RMR30 wreck?

it got 1 inch of mud on it, bolts are somewhere in the mess!

[coupe72001]

Thanks for the offer, but Ive got open spinners galore! I miss my LSD so bad though - my car accelerates about half as quickly now... er better fuel economy on the highway though...

Research has found that the diff is made by Fuji heavy industries - who supply diffs for Datsun, Nissan, Subaru, Mazda... god knows who else. Some are LSD and some aren't and there are a mind-popping number of ratios available. Ill post some more trivia about R180s soon. Anyone else can feel free to join in.

D

[coupe72001]

Cheaper replacement LSD carrier from the states...

http://www.speedstash.com/phantomgrip/phan..._slip_conv.html

Comes with a lifetime warranty, but according to my local Dat Rally place the factory stuff is way stronger!

Does anyone know how interchangeable the LSD carriers are. For example I can easily get sr20det LSD's, but will they transplant into an R180 housing?

Best quote in Australia so far is $700 for a second-hand L200 long nose LSD.

[Matty T]

Do a bit of a Google of "Phantom Grip" and you will find that they are referred to as "Phantom Slip". Crap. Not worth thinking about.

If you want to stick with an R180, then you will not get out of it for less than $1000. You may be lucky, but it will probably be in dire need of a rebuild.

The R200 option is cheaper for LSDs. I have a KAAZ LSD in my R200 (which is in my R30). The problem you would then run into is ratios. The R200 diff you were quoted will probably be a 3.9. The shortest R200 ratio that is reasonably available will be a 4.625, and even then, they are getting hard to find. 4.875 and 5.143 ratios are available from Kameari, but are about $1500 for the crownwheel and pinion alone.

Your cheapest option is to weld up an R180. Make it a locker.

[rsx84]

source a DR30 R200 rear end, $700 at most shipped, try SSS automotive in the parts department sticky at the top of the forum.

you could go to an s-13 rear end swap but that would set you back around the $2000 mark.

Edited June 19, 2007 by rsx84

[skybt1]

does the s13 rear end bolt into an r30? no mods?

[coupe72001]

Thanks so much for the replies.

I sourced a Nismo clutch-type LSD carrier (not the complete diff) slightly used, and cheap enough, from the states to suit an R180. I am crossing my fingers that the damn thing bolts up, as I want to retain my 4.875:1 ratio so much. I have a friend in Japan on the hunt for complete r180 and r200 LSD's because they seem to be such a bastard to get here.

I too am curious if anyone has tried the old mix-and-match with short-nose centres into long-nose diffs. Surely that is the cheapest way to convert your r180 open-wheeler to LSD...

[rsx84]

does the s13 rear end bolt into an r30? no mods?

a bit of engineering involved with the new craddle mounting points but not impossible, i have a mate who is very good in the mod department and has built a few 1200 utes and coupes and is looking into it for one of those, he's thinking s-13 or r33 rear conversion..

a bit of an outlay to start with but the diff choice is alot better and cheaper...

Edited June 19, 2007 by rsx84

[rsx84]

does the s13 rear end bolt into an r30? no mods?

i think you'll find more info on the diff swaps and matches from the r31 forum as the HR31 has a long nose r200 diff..

Go to this link and have a look at the R30 LSD section and if you want to bid or even get a price delivered to your door contact Zac...

http://www.slidewizeimports.com/products/yahoolinksR30.html

[coupe72001]

i think you'll find more info on the diff swaps and matches from the r31 forum as the HR31 has a long nose r200 diff..

Go to this link and have a look at the R30 LSD section and if you want to bid or even get a price delivered to your door contact Zac...

http://www.slidewizeimports.com/products/yahoolinksR30.html

Thanks that's extremely helpful.

Do you know off-hand if the R30 diffs have the same/or will accept the C210 half-shafts?

[rsx84]

Thanks that's extremely helpful.

Do you know off-hand if the R30 diffs have the same/or will accept the C210 half-shafts?

Sorry completly forgot you have a c210, if the spine/teeth # matches then you should be fine. Email Zac and see if he can send a link from yahoo with what model you exactly need??