I have a 2009 Sierra 4x4 1500. I just had the differential gears changed from 342 to 410s. after brake in I plan to change out the oil. i bought some house brand synthetic 75 90 I'll prob take back. just google searching it looks like amsoil and royle purple are the top 2.
I know I'll use synthetic in the back but the manual calls for 80 90 in the front and im not sure if i should go ahead and use synthetic in both axles.
the hardest work the truck will do is pull a 5000lb travel trailer in hilly areas.
the truck has open diffs so I'm probably overthinking this.
thanks for any opinions on the matter.
I know I'll use synthetic in the back but the manual calls for 80 90 in the front and im not sure if i should go ahead and use synthetic in both axles.
the hardest work the truck will do is pull a 5000lb travel trailer in hilly areas.
the truck has open diffs so I'm probably overthinking this.
thanks for any opinions on the matter.