Changing diff. fluid???

[rebel77]

How often do you change?

Do you use synthetic?

[SilveradoWV]

I have changed the rear, used Mobil 1. I get a little card in the mail sometimes saying its time for whatever maintenaince and about the first card I got it said to change the rear diff fluid after the first 500 miles of towing, so thats what I did. Never have changed the front.

[points]

I changed mine both to Amsoil 75-90 gear lube.  At 65,000 miles the back looked ok but the front look bad.... thick...  I glad i did both.

[Bish]

I changed the rear at 5K after my first 500 miles of towing.  every 25K for the rear, every 50K for the front.  Mobil 1 front and rear.

[Black02Silverado]

I changed both front and rear at 12k. Filled back up with the Series 2000 75w-90 Amsoil synthetic. The magnet had little fuzz on it but nothing bad. I will change it back out in both at 50k.  :thumb: