DIY: 350z Limited Slip Differential

Courtesy: acidjake7 on 350zMotoring
Link: http://www.350zmotoring.com/forums/diy-garage/53543-diy-limited-slip-differential-install-pics.html

PLEASE DONT BE INTIMIDATED by this. It was quite easy when you just get good at following directions.

First thing is first - GET THE FSM (Factory Service Manual) so you will know what foot lbs of torque to use when you put everything back together. THIS IS A MUST - IF YOU DONT HAVE THE FSM - DONT START THIS PROJECT.


First - Jack up car






Get everything ready and take pics of your very expensive purchase..


Get under the car and start taking stuff off - you will need a 14MM socket and 17MM... the 14mm is for the axle bolts. The 17 is for the driveshaft bolts..


unbolt the driveshaft and MAKE SURE you have a towel or something to lay it on cause you DONT want to mess up that bad a$$ carbon fiber..


Another pic - just for reference..


Now there is one bolt (17MM) on the back of the diff that holds it in place - remove it..


Now that everything is unbolted - make sure you remove the breather hose tube and 2 (12mm) sensors (these are for speedometer) - theres one on each side closest to the axles.. YOU WILL NEED help on this part - Pumpkin is HEAVY!


Drain your Diff - here is my way of doing it cause that pumpkin is HEAVY.


remove all the bolts on the diff cover - they are all 14mm


After removing the cover (screwdriver and soft mallet) remove the axles. They actually slide right out after a few taps.. so be gentle and REMEMBER WHICH SIDE IS WHICH!! <--- very important!



Now here is bearing housing bolts - 17MM (again) - IMPACT them bad boys off - AGAIN, remember which side is which..


Another Pic of removing bearing housing bolts. Theres just 4 ...NO FUSS...


Now here you see me banging out the diff with an extension .. few taps later and diff comes right out..


Diff is out and just needs a good YANK.. Have your buddy hold on while you pull that whole thing out.


Put the Open DIff in a VISE and begin the hardest part of the project. These bolts are LOCTITE in so it take ALOT of effort...So take turns cause this is tiring.. Oh and these are 17MM. Get a BIG breaker bar for this..


Put ring gear on the new diff.. PUT LOCTITE on EVERY single bolt and get to work - these need the most torque - refer to FSM for specs..


Diff is IN the housing - again refer to FSM for Torque Specs..


closer pic

Forgot to mention - get some scotchbrite pads and remove any left over silicone gasket...put some elbow grease in it...you want it nice and clean for when you put your silcone gasket on and put the cover back on.


Now put everything back together - FSM! FSM! FSM!!

Fill her up for break in - take her for a spin - LITTERALLY - LOL

Do figure 8's for 20 mins - take the car back to the house and change that fluid.. After that - YOUR DONE..!