SCato
01-25-2009, 06:06 PM
By: Hunter Rodziczak
I could not find a comprehensive guide to doing this, So I thought I would make one for the good of the S chassis community.
Benefits: Get clutch type lsd action for a 1/4 of the price.
Well post j30 VLSD installation I found myself quite unsatisfied with the performance. As with Many VLSd's after becoming heated up they simply refuse to work properly and your VLSD becomes a one tire fire and thats no good. So after looking for upgrades I stumbled across a few options. Since I have a J30 vlsd with 5 bolt output shafts I would have to switch back to the standard 240sx R200 differential housing in order to run a clutch type lsd. I sold my old diff and a clutch type lsd wasn't in my budget. Somehow I stumbled across Shimming. Shimming involves adding an extra shim(s) to the original preload shim and causes the vlsd to lock similarly to a clutch type lsd. This preload shim costs $10 from you local Nissan dealer so this is definitely worth the money.
-Add one shim and vlsd will act similarly to a 1.5 way lsd
-Add two shims it will act like a 2 way/welded diff.
Here is a picture of the Shim with part no: ( this fits both j30 and R200 diffs)
http://i138.photobucket.com/albums/q276/Mtndrifter14/new5013.jpg
Here's your standard diff, Start By removing the diff from the car and unbolting the 8 bolts holding the diff cover on.
http://i138.photobucket.com/albums/q276/Mtndrifter14/new5001.jpg
Once that is completed, separate the cover like so and before you put the new sealant on remember to scrap off all old sealant and I recommend using brakecleen to clean surfaces before applying sealant back on.
http://i138.photobucket.com/albums/q276/Mtndrifter14/new5002.jpg
This is what you'll see:
http://i138.photobucket.com/albums/q276/Mtndrifter14/new5003.jpg
Next before anything else knock out the output shafts. This takes quite a bit of effort but don't be scared they will eventually come out. I recommend hitting them from behind with a hammer:
http://i138.photobucket.com/albums/q276/Mtndrifter14/new5005.jpg
Next you can take off the cap bolts like so:
http://i138.photobucket.com/albums/q276/Mtndrifter14/new5004.jpg
IMPORTANT: Remember which side the shafts and caps cam from as to not mix them up
http://i138.photobucket.com/albums/q276/Mtndrifter14/new5006.jpg
And this is what you're left with:
http://i138.photobucket.com/albums/q276/Mtndrifter14/new5007.jpg
Next, it's time to pry out the differential. Unless you have superhuman strength you have to get it out using a bar that give leverage:
http://i138.photobucket.com/albums/q276/Mtndrifter14/new5008.jpg
And end result:
http://i138.photobucket.com/albums/q276/Mtndrifter14/new5009.jpg
Unless you have a very good impact gun the next part is almost impossible. Take these bolts out to separate the ring gear from the diff.
http://i138.photobucket.com/albums/q276/Mtndrifter14/new5010.jpg
Next take off these two Phillips head screws.
http://i138.photobucket.com/albums/q276/Mtndrifter14/new5011.jpg
Pry apart:
http://i138.photobucket.com/albums/q276/Mtndrifter14/new5014.jpg
The Almighty shim:
http://i138.photobucket.com/albums/q276/Mtndrifter14/new5016.jpg
Now take this and put it over the existing shim:
http://i138.photobucket.com/albums/q276/Mtndrifter14/new5013.jpg
And now put the diff back together the same way you took it apart.
I could not find a comprehensive guide to doing this, So I thought I would make one for the good of the S chassis community.
Benefits: Get clutch type lsd action for a 1/4 of the price.
Well post j30 VLSD installation I found myself quite unsatisfied with the performance. As with Many VLSd's after becoming heated up they simply refuse to work properly and your VLSD becomes a one tire fire and thats no good. So after looking for upgrades I stumbled across a few options. Since I have a J30 vlsd with 5 bolt output shafts I would have to switch back to the standard 240sx R200 differential housing in order to run a clutch type lsd. I sold my old diff and a clutch type lsd wasn't in my budget. Somehow I stumbled across Shimming. Shimming involves adding an extra shim(s) to the original preload shim and causes the vlsd to lock similarly to a clutch type lsd. This preload shim costs $10 from you local Nissan dealer so this is definitely worth the money.
-Add one shim and vlsd will act similarly to a 1.5 way lsd
-Add two shims it will act like a 2 way/welded diff.
Here is a picture of the Shim with part no: ( this fits both j30 and R200 diffs)
http://i138.photobucket.com/albums/q276/Mtndrifter14/new5013.jpg
Here's your standard diff, Start By removing the diff from the car and unbolting the 8 bolts holding the diff cover on.
http://i138.photobucket.com/albums/q276/Mtndrifter14/new5001.jpg
Once that is completed, separate the cover like so and before you put the new sealant on remember to scrap off all old sealant and I recommend using brakecleen to clean surfaces before applying sealant back on.
http://i138.photobucket.com/albums/q276/Mtndrifter14/new5002.jpg
This is what you'll see:
http://i138.photobucket.com/albums/q276/Mtndrifter14/new5003.jpg
Next before anything else knock out the output shafts. This takes quite a bit of effort but don't be scared they will eventually come out. I recommend hitting them from behind with a hammer:
http://i138.photobucket.com/albums/q276/Mtndrifter14/new5005.jpg
Next you can take off the cap bolts like so:
http://i138.photobucket.com/albums/q276/Mtndrifter14/new5004.jpg
IMPORTANT: Remember which side the shafts and caps cam from as to not mix them up
http://i138.photobucket.com/albums/q276/Mtndrifter14/new5006.jpg
And this is what you're left with:
http://i138.photobucket.com/albums/q276/Mtndrifter14/new5007.jpg
Next, it's time to pry out the differential. Unless you have superhuman strength you have to get it out using a bar that give leverage:
http://i138.photobucket.com/albums/q276/Mtndrifter14/new5008.jpg
And end result:
http://i138.photobucket.com/albums/q276/Mtndrifter14/new5009.jpg
Unless you have a very good impact gun the next part is almost impossible. Take these bolts out to separate the ring gear from the diff.
http://i138.photobucket.com/albums/q276/Mtndrifter14/new5010.jpg
Next take off these two Phillips head screws.
http://i138.photobucket.com/albums/q276/Mtndrifter14/new5011.jpg
Pry apart:
http://i138.photobucket.com/albums/q276/Mtndrifter14/new5014.jpg
The Almighty shim:
http://i138.photobucket.com/albums/q276/Mtndrifter14/new5016.jpg
Now take this and put it over the existing shim:
http://i138.photobucket.com/albums/q276/Mtndrifter14/new5013.jpg
And now put the diff back together the same way you took it apart.