J30 or Q45 Diff?

Silvi4 · Aug 15th, 2007, 08:25 PM

I have been searching for a J30 Diff but havent had much luck finding one, but on the other hand i did come across a Q45 diff today that i can pick up for 40$. How does the Q45 diffy stand with the j30 and will it even fit lol

thanks for your help

**rogoman** · Aug 20th, 2007, 08:28 PM

Here's some info I picked up from other souces, hope this is some help for you:

'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.

Nismo240 · Aug 21st, 2007, 02:08 AM

just weld your open diff.