2014 RDX Base. I did a Diff & Transfer case drain/fill. followed the proper procedures. However afterwards I can feel a vibration/shudder if you hard accelerate. If you floor it its not there. If you accelerate gently its not there. Only HARD.

I've learned that although 2G RDX has no SH-AWD, it does have an intelligent AWD system that operates a clutch pack, which engages when you hard accelerate. I suspect the clutch packs are worn and require friction modifier.

MY QUESTION IS, where do I add the friction modifier and how much do I add?? I suspect the pump&clutch pack is located in the diff housing, but I want to make sure since my dumbass changed both at the same time.

 

At what mileage did this happen?
If this didn’t happen before, but after the drain/fill it started, does that mean something was done wrong?

 

100k. I don't believe so. I used Honda Dual Pump fluid and followed the drain/fill till it comes out the fill bolt procedure. Car was horizontal.

 

Dual Pump fluid? Why did you put Dual Pump fluid in there?

 

I've searched multiple dealer sites/forums and everyone is saying ACURA AWD FLUID DPSF (08200-9007A) is the same as HONDA DUAL PUMP FLUID (08200-9007). It's repackaged and dealers use them interchangeably. Unless I'm wrong?

For Transfer Case, I used Honda OE 75-85 gear oil.

 

I got you.

 

Check your U joints on your drive shaft.. rumbling or juddering could easily be that especially if you feel it under your seat!