Announcement

Collapse
No announcement yet.

Help with OS Giken LSD install

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • Help with OS Giken LSD install

    Trying to gather concrete info and double check myself since I need this done very quickly. Running an LS1/T56 combo with 390whp. I'm bouncing off the rev limiter way too often around the track and think I want to try a 3.54 final drive.

    Old setup: Stock S14 diff housing, S15 HLSD, S15 output shafts, stock 4.08 ring and pinion.

    New setup: Stock S14 diff housing, OS Giken NS046-HA LSD. It looks like I need a Q45 3.54 ring and pinion, not sure about shims, likely stock S14 output shafts, and to swap the pinion bearing from an S14 pinion to the Q45 pinion? Will the one I have work?

    So far this has been the most relevant source of info I can find: http://www.ls240sx.com/site.aspx?pag...20RP%20Install

  • #2
    Get a new pinion bearing, they're cheap.

    You'll have to setup the diff if you pull the pinion out. Why not find a Q45 R200 with the right ratio and use that as the starting point? Pinion height is set, no pinion bearing worries unless you want to refresh it. Then just toss the Giken in and double check the backlash and preload. Might need some shimming side to side, but Nissan diffs are well made enough that they're always interchangeable in my experience.
    '18 Chevrolet Volt - Electric fun hatch for DD duty!


    DefSport Koni Sleeve and Spring Perch Buy!!!
    http://www.nissanroadracing.com/showthread.php?t=5902

    Comment


    • #3
      You'll need to make sure you get the later Q45 diff (95-up?) with the 3x2 bolt stubs. If you do that, the OSG diff should drop in. The only thing is, that I think those diffs are 3.692:1. The early Q45 has a VLSD, and the big 6-bolt output shafts, but the pinion shaft is a different size and the splines on the output shafts don't match the R200 or the R230 patterns, so none of the aftermarket diffs will fit. That one is the 3.54:1 version.
      Don Johnson (really!)
      Just so you know.

      Comment


      • #4
        The 92 Q45 had 6x1 and 97 q45 had 5x1 axle stubs like the J30... I don't recall a 3x2 version?
        http://responsetype.com/shop/

        Comment


        • #5
          You're correct about the Q45 not having the 3x2 stubs. That was the later version of the J30. The early J30 CV axles will fit the 240sx with either J30 or 300zxNA stubs.
          Don Johnson (really!)
          Just so you know.

          Comment


          • #6
            You wouldn't happen to know if the z32na and late Q45 use the same axle splines at the hub would you?
            http://responsetype.com/shop/

            Comment

            Working...
            X