Traction Concepts Q50 and Q60 LSD Conversion Kits are designed for the factory OEM Q50/Q60  differential carriers. Whether you have an AWD or RWD model, Traction Concepts has your solution to the one-wheel spin woes.  The installation is pretty straightforward for those with knowledge on the differential disassembly and reassembly. Here are some tips and tricks to go along with the Traction Concepts Basic Installation Guide included with your Q50/Q60 Traction Concepts LSD Conversion Kit.  
Here is the view from underneath prior to tear down
  1. Make sure the car is in neutral and the parking brake is off.
  2. Begin by taking off the mid-pipe and 2 heat shields along with the cross
  3. There are 2 braces- One “brace” on either side of the differential that must also be removed.
  4. Take off the rear sway bar.
  5. Support the rear diff.
  6. Mark the rear prop shaft rubber coupler and the final drive companion flange. You must put these back with everything lined up to these marks. Do NOT remove the rubber coupler from the prop shaft. Once it’s marked you can remove the 3 bolts and gently pry the prop shaft forward to loosen it from the final drive companion flange.
  7. Loosen the center bearing mounting bracket on the prop shaft towards the transmission end of the prop shaft. This will allow the prop shaft to slide out of the front of the differential.
  8. This image has an empty alt attribute; its file name is infiniti-q50_q60-drive-gear-ring-gear-mounting-torque-specs.jpg
    There are 2 large bolts on the bottom of the diff that need to be loosened and 1 horizontal bolt at the top of the diff that must be removed. Support the diff and lower it slightly so you can better access both (2) wheel speed sensors and the differential vent tube that must be disconnected.
  9. Get a pry bar and gently pry each of the CV axles out of the diff. There will be tension here, so take your time and don’t damage anything while removing the differential.
    Once you have the diff out, drain the oil and start breaking it loose. There are (6) smaller bolts, and (4) larger bolts to take out and split the 2 halves of the diff casing apart.*You can remove the ring gear after marking its location so it goes back on exactly in the same orientation.

Next, the Traction Concepts part of the install. Your Traction Concepts LSD Conversion Kit comes with a step-by-step, pictorial installation guide to walk you through installing the LSD Conversion Kit into your Q50 or Q60 differential.

Once you have the diff carrier back in the housing, clean off all the grease and dried RTV and put down a light bead of new silicone/RTV. You’ll probably have to use a rubber mallet to get the cover back on the diff housing.

Reassembly is the opposite of disassembly. Make sure the CV axles are pushed in all the way and that the C clips were still in place on the axles when you press them back into the housing. You’ll have to play with the diff angle and height to get them to slide back in but it’s not bad. You can reuse the oil seals if they’re in good shape.
Once you get the diff back in completely, you may use a pump to refill the diff.
NOTE- Follow your Infiniti Q50/Q60 service manual on oil quantity. Probably somewhere around 2 1/4 -3 pints of oil, (1.5 qt). *Make sure to reconnect the wheel speed sensors and differential vent tube.

Choose the Traction Concepts Q50/Q60 LSD Conversion Plus Gear Set  for an ease in a more plug-and-play install; or you can purchase the Traction Concepts Q50/Q60 LSD Conversion Kit alone. You will need to resurface these gears on your end if you do not purchase the complete set. You can get this done at a machine shop using a lathe, mill or bench saw, or table grinder. Perfect for the DIY project build. Nothing is to be done until you have the LSD Conversion Kit in hand and the diff carrier out on the bench. That way you know exactly what clearance tolerances you are working with.

Traction Concepts Q50 Gear Set

After your Traction Concepts LSD Conversion is installed, you can now begin to enjoy your newly added upgrade with traction to both wheels. Make sure to allow the lubricants to flow through all the components with the car warming up before rolling out. Traction Concepts Limited Slip Conversions also offer a “locker” type function when performing a hard launch or burnout.  Daily driving is safer with more confident and predictable handling on wet or dry road surfaces. Racing applications benefit from faster, controlled cornering speeds and less wheel spin.  

Shop for your Traction Concepts Q50/Q60 Limited Slip Conversion Here