I did this awhile back in my truck but my brother was driving it and it made a weird noise but we cant think of what it could be. Heres a link to the video on my photobucket it anyone has an idea.

http://s69.photobucket.com/albums/i4...t=MOV04717.flv

 

was it in 4 wd? almost sounded like it was not fully locked in

 

truck is only 2wd, also I hear a low grinding noise when I drive slow and I hear a popping noise somewhere when I turn when driving slow

 

do you have posi rear? low speed noise turning can be bad clutches, or spider gears

 

its the limited slip unit, dana 70 4:10s

 

I would have to say that sounds like the rear diff. clutches. Just my guess.

 

Could it be that the fluid was replaced without the friction modifier?

 

i would say take off the diff cover and see if there is anything obviously wrong in the carrier assembly

 

well I've had the truck since 119,000 miles and it has like 178,000 on it now, never changed the fluid, I have the stuff to change it but I did some front end work instead but I am gonna try and change it this week