So I'm almost up to my 15,000 mile service interval on my 2007 Dodge Ram 1500 4X4...

Priced out service at the Dodge dealershipthought more than $100 a diff was a bit much...

Priced out Mopar gear lube at the dealership 3 quarts of 75W-140 and 2 quarts of 75W-90

Cost without tax for the fluids came to $112.01 !!

What the hell is that all about?

I asked if I must use Mopar fluids to follow along with the Lifetime warranty and couldn't get an answer.

Anyone know answers?

Oh yeah, one more thingif you look up service intervals on other trucks it is MUCH longer between diff service.

Lets do some mathfor the DIY guy, if you did it yourself at 15,000 miles for $112 a shot, versus ignoring them for I figure by about 90,000 miles or six changes you could have simply tossed out one of your differentials (rear) and swapped in a brand new one for cost and almost have broke even. If you had Dodge service do them both at their price, you likely could have simply ignored both front and rear for about the same mileage and replaced them both as though they were disposable items...

minnesotamopar

 

it doesnt all have to be mopar it can be any type of fluid just whenever you do it yourself keep your receips that is what my dealership told me.

 

i just had mine done and it was about $300 for both of them

 

3 bottles at a parts store, M1 syn will run you $15 a bottle. Add another $7 for the LSD friction modifier if you have a LSD. Then of course some gasket sealant.

 

If you get the Mobile 1 synthetic fluid, it has the LSD additive already in it. I learned that when I did it myself. However, I think this next change will be done by the dealership. I did both diffs and the transfer case.. blah...

 

That is true, but the print reads,

Mobil 1 Synthetic Gear Lube 75W-140 LS contains special friction modifiers designed for limited slip-type differentials.In most applications, the addition of special LS (limited slip) additives is not required.For axles requiring the highest level of limited-slip performance, OEM specific LS additives can be added to this fluid.

 

$112 ~ pssh that's nothing. Got the double-deap tranny pan & larger capacity front & rear dif. covers. Dropped Royal Purple in all 3 and dropped over $250. But oh yeah baby are my gears happy

As for warranty as long as you keep records and can prove that the product you put in is as good or better than what the dealer would us you'll be fine.

 

it has to do with the c(u)nt clips in your rear. Other than that there's no reason to change it unless you submerged the diffs.

Do a search on c clips. Many many threads on it and I don't feel like typing it all on my iPhone, plus I'm drinking.

 

Thanks for the replies allI know what the cost of aftermarket grease runs for and all, but since it was left legally unsaid in the warranty and so far it's all word of mouth from a non-identified dealer dude that "Sure, use anything as long as it's as good or better, and keep your reciepts" is a little too non-legally binding as compared to the warranty legaleze us customers are bound to... I'm jus' sayin'...

Amazon has Royal Purple with no shipping right now...

That said, I'm not a real royal purple kool aid drinker or Amsoil or Mobil or others either. Whywell simply because there's a reason for specs like 75W140 and API GL-5, MT-1, MIL-PRF-2105E etc. If a lube is to the called for spec, and the equipment it is in is not defective there shouldn't be any reason every internally lubed part of your vehicle won't last just as long with one or the other. Feeling good about spending more money on things that I can not verify their extra worth isn't something I get into much. Argue all you want about a better lube making a device last even longer than designed to but proof isn't there. But that's just the engineer in me talking.

Although I will likely buy Royal Purple or Amsoil online since it's less than valvoline or others locally and has no tax or shipping.

I'm just a little pissed that a Ford and GM/Chevrolet and has lifetime gear lube.

The 9-1/4 rear has been around for ages, and yes they have C-clips, but so do a ton of all makes and models of vehicles since the 70's. They work. There's another reason for the lube interval in my opinion but I don't know what that reason would be other than to make money with service or to skirt a known weak link in the driveline. I had a 1982 Dodge 2WD truck that I never replaced the lube on.


minnesotamopar

 

i did mine my self with amsoil, for under 40 bucks. Speaking of wich,....i am about due for them again..