Hello and thanks for your question. My name is Eddie and I will do all I can to help.
One the front of the transfer case, you should see a drain plug, you remove this drain plug and use a suction gun to push in the new fluid.
Take out the drain plug, and drain it first. then tighten the drain plug,
Your transfer case holds 2.6 pints of fluid.
Here are the specifications.
After draining the transfer case fluid, remove the fill plug and push in the new fluid with a suction gun.
Infiniti recommends Nissan Matic "D" type fluid in your transfer case, let me know if you have any further questions.
Alright, I understand, What made you believe your technician did not install the transfer case correctly?
I understand. Look closely at your front and rear tires. Are they the exact same size? If mismatched size tires were ever put on , that could explain it.
There is a module and a component on the transfer case that engages the transfer case when the ABS module detects slippage. What you need to do, is put it on a lift, all 4 wheels. Where on a lift, slippage is simulated. because the main drive wheels are in the air, so all 4 should spin. If they do not, Then the first thing I would check would be the codes in all the modules including ABS module. This will take an advanced type scanner. A regular OBD II type scanner for just engine codes will not work. Depending on what codes are stored, that will help pinpoint the cause of failure.
Absolutely. Thank you.