Looking for some information. Hopefully someone can help.

I had a local shop install detroit tru-tracs front and rear in my 2012 jku sport.

When I got home I jacked up my vehicle and this is what I found. In neutral spinning one rear tire the other did not move. Spinning one front tire and the other moved along with it.

What's going on here. The front is doing what it is supposed to and the rear sucks.

I see in the paper work they used synthetic and also put in friction modifyer. Detroit says to use Dino oil.

Any ideas?

 

Dynatrac said in another thread that trutracs don't like synthetic oil and every time someone has an issue that's the first question he asks.

 

Yeah its going back today to have that changed. Thanks for the info.

 

A Truetrac does not act like a typical LSD or Posi. When you lift you tire and spin it (by hand) the other tire will go the opposite direction. If the front doesn't do this it's probably not broken it yet.

 

... What a scary feeling! maybe more research was in order?

 

Thank you dynatrac. All is well. They switched out the gear oil for me and like you said one tire spins one way and the other goes the opposite.