Ok I'm reading the owners diesel supplement manual for my 09 6.7 and I see that they are saying to change the front and rear axle fluid every 15 k. What say you folks ? Myself I never changed the fluid in any of my trucks to this day and never had a problem. They were all Fords. Does Dodge have something that really requires this fluid changing ?

 

I changed mine at 15000. Checked for metallic residue, saw none. Filled with premium recommend synthetic. Will check again when I feel like it. At 48000 right now. Im thinking maybe 75000. Dont see any reason to change it that often.


If I remember correctly there is no limited slip additive.

I think Dodge is just recommending you change it at there interval, and hope you use their oil, at bout 20 bucks a quart, and pay them to do it.

 

Thanks Blake, I thought it was a little excessive.

 

No problem. Other may disagree, but that my 2 pennies.

 

We have an 05 and have had 2 other Dodge 2500's. I have made it a pratice to change the axle and transfer case fluids every 35000 miles. Did it on our Chevy as well. Our 05 Jeep Cherokee says every 12000. I know a lot of folks that never do. I figure since we tow a boat and tractor, need to keep the fluids fresh.

 

75k and I'll change mine when I do trans next time. 15k is a bit excessive in my opinion.

 

The reason they want to require changing fluids at 15K miles is because they can and do charge $300 to change the fluids. $300 to keep your warranty in place by the number of trucks sold is a pretty attactive number for the dealers.

I wish I could trust Dodge, but based on it's behavior - tough row to hoe.....

River-Runner

 

I have changed mine one time at about 40k miles. I went to Amsoil Severe Gear 75w90 gear lube, which is guaranteed for 100,000 miles under regular use, and 50,000 miles under severe use. Seeing as how my truck is unloaded 99% of the time, I call that regular use, so I shouldn't have to change my gear lube again till 140,000 miles.
Scott

 

I just did mine today, replaced it with Mobel 1 synthetic. The rear was easy to suck out with a suction gun but on the front I had to drop the cover.
The rear fluid came out grayish looking while the front was more like clean oil.
$63 for lube & a $5 suction gun. I saved the Dealer all that worry about counting my money.

 

I did my first change at 40k. SAme as mentioned above. Rear was grey and front was brand new. I don't use 4wd very often so its expected. I replaced it with the Valvoline Synth 75w90. I will continue to do mine every 40k. Make sure you drop the covers that way you can wipe out any junk that has collected at the bottom f the cover.

 

After seeing the factory fluid when I drained it at just under 10K that looked like gray 5w engine oil I would not trust the factory stuff past 10,000 miles. Once you install good synthetic gear lube you can go longer depending on the quality of the gear lube you chose to use.