The first change on the Outback was very dark also. But I found out that Subaru uses a factory fill with a huge dose of moly. So that accounted at least for part, if not all of why the first change was so dark. Every change after that has looked almost as good coming out as it did going in.I changed it on my 3500s at 5,000 miles and it was pretty dark, presumable with wear metals, then again after another 10,000 miles. The fluid is pretty clean after the second change, so I put in HPL 75w-90 and will sample it after 30,000 miles on the fluid and decide from there. These differentials are so strong, there is little reason for them to wear, unless the factory fluid is run with all the wear-in metal.
More info is required. Is this a 1500, 2500, diesel? It’s tough to find that owners manual but I’d wonder about that 15,000 number.My owners manual on my new to me 06 RAM had 15,000 miles. That seem kind of crazy to me. How often do you change your rear end fluid?
What did you use for the first 2 changes before putting in the hpl diff life?I changed it on my 3500s at 5,000 miles and it was pretty dark, presumable with wear metals, then again after another 10,000 miles. The fluid is pretty clean after the second change, so I put in HPL 75w-90 and will sample it after 30,000 miles on the fluid and decide from there. These differentials are so strong, there is little reason for them to wear, unless the factory fluid is run with all the wear-in metal.
I have gone 30k with no issues on my 2008 Jeep but mostly go 15k because it has drain plugs on the diffs and is easy. I do 15k on the 18 and 21 Jeeps. I run 75w140 synthetic in both ends because that's what Dana recommends. I've run Mobil 1 for the longer distances but also Supertech and Valvoline. I like Valvoline lately because it comes in bags.My owners manual on my new to me 06 RAM had 15,000 miles. That seem kind of crazy to me. How often do you change your rear end fluid?
HPL 75w-90What did you use for the first 2 changes before putting in the hpl diff life?
Well done. The best time is when you get it from a previous owner. Service that bad boy from one end to the other.If the vehicle has an easy drain plug, I try and remember every 20k. Then again, I had a rear end fail because it was contaminated with water from the PO. Apparently he was launching boats frequently.