VLSD's that work....and ones that dont

Nissan VLSDs that work in a 240sx and the modifications needed to bolt it in:

VLSD sourced from:

240SX with ABS
Modifications needed: None
Differential housing is ~.75" longer
4.083 Ratio

’95-96 Infiniti J30
Modifications needed: None
Differential housing is ~.75" longer
3.916 Ratio

’90-96 300ZX N/A
Need different output shafts or axles and longer front bolts
Can use '92-94 J30 axles -OR-
S13/S14 (or ’95-96 J30) VLSD output shafts
4.083 Ratio

'92-94 Infinity J30
Need different output shafts or axles Can use '92-94 J30 axles -OR-
S13/S14 (or ’95-96 J30) VLSD output shafts
Differential housing is ~.75" longer
3.916 Ratio

The differentials listed above are the easy, bolt-in options for 240SX owners. The Q45 diff, below...is much more application specific.

Basically, if you want to use a Q45 diff with the lower ratio...have a good reason:
+450rwhp, road racing for BIG courses, higher trap speed for drag racing (i.e. +140mph) etc...

VLSD sourced from:

'97-01 Q45
Need different axles... Should be able to use '92-94 J30 axles.
NOTE: Different VLSD output shafts are NOT an option...
...the spline count inside the diff is different.
3.54:1 or 3.69:1 ratio...

'90-94 Q45
Need different axles AND hubs - You'll need: (per Steve of S&M Racing)
'90-94 Q45 (or Z32 turbo) rear hubs (5-lug)
2 new axles: One from a turbo Z32, one from a Q45
PASS. side of your S13/S14 uses a DRIVERS side Q45 axle
DRIVERS side of your S13/S14 uses a DRIVERS side Z32 TT axle
Input/pinion flange is LARGER - Need a different driveshaft or flange



The M30 diff WILL NOT WORK because of the location of the diff mounting points.


Miscellaneous Notes:



If you own an S13 (89-94) you will need to swap the rear cover off your stock open diff onto the VLSD:

The S13 uses a different bolt pattern (4 bolts) than the S14 (2 bolts) on the rear cover...



You will also need 2 longer mounting bolts for the S13 chassis, and 2 large washers for the front mounts...to be used with the large bushings on the front mounts.

-Washers need to be ~1.5" diameter or so, and 1/8" thick.

The bolts are M12 X 1.25 thread/pitch, 85mm long.

The stock S13 front mounting bolts are not long enough for the J30 and S14 diff mounts.



To overcome the .75" extra length at the nose of the diff you can:

1) Install it and see if your driveshaft and tranny mounts have enough play to soak up the extra length.

2) Get a driveshaft from an ABS equipped 240SX...it's .75" inch shorter.





---jay---

Good info, worthy post.
This should help alot of people, it would've helped me but I've already studied the shit out of this when I got my J30

turbojay240z wrote:

VLSD sourced from:

240SX with ABS
Modifications needed: None
Differential housing is ~.75" longer
4.083 Ratio

What are you trying to say, that most ABS 240s have a "VLSD"?

Yes...most, if not all 240's w/ abs also came with a vlsd... just look for the orange sticker on the diff that says lsd to make sure.

Ah, ok, so they are labled...

Don't just hate it when you slam on the brakes in a car with ABS and it locks up and drives like shit till you shut it off and start it again...

Well my convertable has ABS, but it's a one wheel wonder...

My car has vsld and abs

wes's car didnt seem like it had abs when it almost slammed into the back of me on the cruise..........=[

s14drift-n-fuck wrote:

wes's car didnt seem like it had abs when it almost slammed into the back of me on the cruise..........=[

Lmfao!!! That was great...