Have Cash... Will Buy... (R200 rehash)

[herrods]

still looking for a longnose R200 3.9 LSD  let the last one slip through my fingers, but have the funding now, so anyone who spies one around the traps...

 

Cheers

Dave

[MaygZ]

there are a few 4.36 LSDs on ebay at the moment.  Is it difficult to change wheels to 3.9?

[RB30X]

Shouldn't be, most of the r200 I've seen had 3.9's standard.

[herrods]

all the r200 long noses that I have seen ont he net are the 4.36, which will be a bit on the short side when we start winding it out.

 

whats thjis wheel swapping business?

[Zedman240®]

Theres a guy on ebay that imoprts LSD's from Japan; if you msg him he may be able to source a 3.9. He usually sells 4.11's on ebay (username nnn67 I think?) for about $1050. Or try Adelaide Jap imoprts.

[Mr Camouflage]

all the r200 long noses that I have seen ont he net are the 4.36, which will be a bit on the short side when we start winding it out.

 

whats thjis wheel swapping business?

 

Buy a R200 LSD in any ratio (eg 4.36), and an open r200 in the ratio you want. Swap the crown wheel and pinion from the open diff onto the LSD center, set the backlash, and Bobs your aunty, you have an LSD R200 in the ratio you want..

[MaygZ]

Gee, he makes it sound so easy.  It's a fiddly, time consuming job to get the toe, heel, backlash and over run right.  A whiney diff will get your mader than a whiney wife!!

 

But a pro should be able to knock it up for your quickly.  (Diff or wife ???)

 

A much easier way to get a 3.9LSD.  Good luck.

[Scando]

Most open R200's have different size crownwheel bolts to the LSD's so this can cause problems if you try to do a swap.

[Whittie]

This:

 

Buy a R200 LSD in any ratio (eg 4.36), and an open r200 in the ratio you want. Swap the crown wheel and pinion from the open diff onto the LSD center, set the backlash, and Bobs your aunty, you have an LSD R200 in the ratio you want..

 

and this:

 

Most open R200's have different size crownwheel bolts to the LSD's so this can cause problems if you try to do a swap.

 

I used a Viscous centre out of a Silvia to do this, so I had to modify the axles (take the original and the silvia ones, cut them up, swap the axles from the silvia to the zed hub, and weld them back together) cost was about $1000 for all the work including getting a shop to put the diff together. Buying something like this would be about $1500, so you're still better off, and you can get ANY ratio you want. I have 4.4, 3.9 and 3.5 all using the same method.

[Mr Camouflage]

Gee, he makes it sound so easy.  It's a fiddly, time consuming job to get the toe, heel, backlash and over run right.  A whiney diff will get your mader than a whiney wife!!

 

But a pro should be able to knock it up for your quickly.  (Diff or wife ???)

 

A much easier way to get a 3.9LSD.  Good luck.

 

Yes, well you don't try this at home. Take them to a diff place and let them sort it out.

[Zedman240®]

Most open R200's have different size crownwheel bolts to the LSD's so this can cause problems if you try to do a swap.

With that bolt issue, I had to do that mod as I did the ratio swap with my LSD from 4.4 to 3.9. My 4.4 crown gear had M12 bolts and the 3.9 had M10. I just machined up some small "rings" or you could say washers to sit inside the LSD center which was still M12 in size but with a M10 hole. When I swapped the gears, you also get the bolts that bolt the center to the crown gear. Once that is done, diff goes together like any other. Would've been perfect if all the diff's had the same bolts! Oh well

[DatZed]

I've got a 4.11 motorsports lsd setup. It's got additional clutch packs and a solid pinion spacer. Brand new since rebuild, PM me if you are keen. Otherwise quite a few of the Z31 turbo's ran 3.9's with the large ring gear bolts, then you just need the centre.

[Scando]

I used a Viscous centre out of a Silvia to do this, so I had to modify the axles (take the original and the silvia ones, cut them up, swap the axles from the silvia to the zed hub, and weld them back together) cost was about $1000 for all the work including getting a shop to put the diff together. Buying something like this would be about $1500, so you're still better off, and you can get ANY ratio you want. I have 4.4, 3.9 and 3.5 all using the same method.

 

Only problem is you end up with a viscous centre.  Depends what you use the car for I suppose.  Viscous are nice and smooth on the street but open wheel on the track once they heat up.  I bought one with the KAAZ centre for a NA S13 already installed.  The NA S13's used the same number of splines as the Z's on the axles so no need to modify the axles.  Herrods, if you wanted to go this way I have the part number for the correct KAAZ centre to use.  Or there is an excellent write up on it on Ozdat.

 

With that bolt issue, I had to do that mod as I did the ratio swap with my LSD from 4.4 to 3.9. My 4.4 crown gear had M12 bolts and the 3.9 had M10. I just machined up some small "rings" or you could say washers to sit inside the LSD center which was still M12 in size but with a M10 hole. When I swapped the gears, you also get the bolts that bolt the center to the crown gear. Once that is done, diff goes together like any other. Would've been perfect if all the diff's had the same bolts! Oh well

 

Exactly what I had in mind but I found one already done, much easier and cheaper 

[Zbitz]

I have a good 3.9 R200 Longnose with axles for $1500  paul@zbitz.com.au

[herrods]

You have PM Zbitz