Originally Posted by BlakeB
Originally Posted by wwillson
I'm running a 50/50 mix of SuperTech 75w-90 and 75w-140 in my 2018 Silverado 3500 HD and will post an oil analysis in about 20,000 miles.
I'm looking forward to your UOA.
I checked the rear diff fluid level in my 2017 3500 HD last night, it was 1.1 to 1.2 inches below the fill hole (spec is 0.6 to 0.8 below fill hole). It's slightly underfilled. I have 12.6k miles, I think I might wait until about 15k miles and change the front and rear diffs as well as the transfer case fluid.
I took my dremel and marked a 90° "dipstick" at 17 & 21mm to make checking my rear diff fluid easier in the future.
Now that's splitting hairs. I use a calibrated index finger.
Originally Posted by wwillson
I'm running a 50/50 mix of SuperTech 75w-90 and 75w-140 in my 2018 Silverado 3500 HD and will post an oil analysis in about 20,000 miles.
I'm looking forward to your UOA.
I checked the rear diff fluid level in my 2017 3500 HD last night, it was 1.1 to 1.2 inches below the fill hole (spec is 0.6 to 0.8 below fill hole). It's slightly underfilled. I have 12.6k miles, I think I might wait until about 15k miles and change the front and rear diffs as well as the transfer case fluid.
I took my dremel and marked a 90° "dipstick" at 17 & 21mm to make checking my rear diff fluid easier in the future.
Now that's splitting hairs. I use a calibrated index finger.
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