I'm in an 6.4L truck, but this is what my gear oil looked like when I changed it at 24k. A little bit less than half of those miles were towing and mostly with our trailer that's around 9k. I expected dark oil for the first change, but this stuff was like midnight and looking very no bueno. If anyone has the factory stuff in there, then I would err on the side of caution and get it out of there sooner than later.
Ron3rd wrote:azrving wrote:Ron3rd wrote:
Here's my page in the 2016 manual if this photo works:
As you can see, no change interval is listed like Cummins posted above.
Do you see the asterisk? Go down to where they show the meaning of the asterisk on 212
Yes, and I'm agreeing with you, I did see the asterisk, but it ONLY gives a change interval for Police, Taxi, etc, as you mentioned. If it's used this way, you change it at 20K, OK, so what about the rest of us??? When do we change the gear lube?? The manual doesn't say.
See the big blank area on my page, compared to Cummins's picture??
There is NOWHERE in the manual where it says you MUST change the OEM lube at 15K. There is NOWHERE in the manual where it says you have to change the gear lube at all if you use your 2500/3500 as a grocery getter, (which I do not)..
This is in the 2016 Manual so things might have changed.
Right, you arent grocery getting so change it at 20k. It doesn't say etc, it says frequent towing. They do leave the determination of frequent up to us. Are you frequent or am I frequent? My money says I'm towing more towards what a ctd is designed to do so 20k. Don't change it at all and you will probably be fine. If you do have the truck long term and the set or the carrier bearings go out you will only be able to wonder if changing could have prevented it. If those who do change at 15 or 20 or whatever have a failure they will know it wasn't from a lack or changes. If they use the spec oil they also know it wasn't the oil.
The other issue I see regardless of what any manufacturer or you or I or anyone here thinks, it only takes one time of hitting the Eisenhower tunnel or east bound from Vail on 70 to put the hurt on the oil with 26,000 pounds going through the gear set with 28 pounds of boost.
I've heard of smoking drive axles in that territory.
I'd be happy to have a gear failure compared to a diesel issue but I do error on the side of caution or overkill with all these systems since it's very inconvenient to be broke down.
azrving wrote:Ron3rd wrote:
Here's my page in the 2016 manual if this photo works:
As you can see, no change interval is listed like Cummins posted above.
Do you see the asterisk? Go down to where they show the meaning of the asterisk on 212
Yes, and I'm agreeing with you, I did see the asterisk, but it ONLY gives a change interval for Police, Taxi, etc, as you mentioned. If it's used this way, you change it at 20K, OK, so what about the rest of us??? When do we change the gear lube?? The manual doesn't say.
See the big blank area on my page, compared to Cummins's picture??
There is NOWHERE in the manual where it says you MUST change the OEM lube at 15K. There is NOWHERE in the manual where it says you have to change the gear lube at all if you use your 2500/3500 as a grocery getter, (which I do not)..
This is in the 2016 Manual so things might have changed.
Ron3rd wrote:
Here's my page in the 2016 manual if this photo works:
As you can see, no change interval is listed like Cummins posted above.
Do you see the asterisk? Go down to where they show the meaning of the asterisk on 212
Here's my page in the 2016 manual if this photo works:
As you can see, no change interval is listed like Cummins posted above.
As you can see, no change interval is listed like Cummins posted above.
