What's new
By:
Ram Heavy Duty Forum

Register a free account today to become a member! Once signed in, you'll be able to participate on this site by adding your own topics and posts, as well as connect with other members through your own private inbox!

Dif oil change

Walmart has a full syn from valvoline, anyone recommend this?

Full Synthetic Gear Oil - Valvoline

Valvoline™ SynPower™ Full Synthetic Gear Oil is formulated for ultimate protection and performance. A thermally stable, extreme-pressure gear lubricant, it is designed to operate and protect in both high and low extreme-temperature conditions. SynPower Gear Oil is specially recommended for...
www.valvoline.com
 
@Rgpracer

I spent my career working heavys. 8 years on B-52, 10 years on VC-25B (AF-1), and 3 years working sustainment for the E-4.

Retired in Oct 21 and now I'm following wife around, she is P&S by trade and currently the 2R functional for AFMC.

Thanks for your service!!
 
Riddick said:
@Rgpracer































































I spent my career working heavys. 8 years on B-52, 10 years on VC-25B (AF-1), and 3 years working sustainment for the E-4.































































Retired in Oct 21 and now I'm following wife around, she is P&S by trade and currently the 2R functional for AFMC.































































Thanks for your service!!







Thanks for your service as well Sir.



I was 6 years Hueys (crew chief/gunner), jumped to AF, 18 years fighter crewchief/flight chief....everything from F4's to B1's.

Merry Christmas
Click to expand...
 
Whats the rear differential capacity? When you buy the limited slip additive how much do you add? Also, I see some people go 75w90 vs the factory recomendation of 75w85. Is there any real difference? I am bored as hell at home with covid so looking for a project.
 
I spent many years under Toyotas dumping diffs n MTs.. In 5 yrs I only saw damage through abuse, never from poor quality oil. I run Mobil 1 or valvoline synthetic cuz it's available everywhere. It's just gear oil, all stinks the same! I like synthetic for the extended drain intervals. But otherwise keep it full, clean, and free of water and you should be fine.
 
OregonRam said:
Whats the rear differential capacity? When you buy the limited slip additive how much do you add? Also, I see some people go 75w90 vs the factory recomendation of 75w85. Is there any real difference? I am bored as hell at home with covid so looking for a project.
Click to expand...
I just used the AMSoil... no additve.

Front is 4.2 pints
Rear is 8.5 pints
 
Riddick said:
If you do not engage your 4wd often you can simply suck the fluid out of the fill hole on your front diff. Even with 30k miles I bet the fluid that comes out will be in great shape.
Click to expand...
You could... but my front diff had some gunk/crud so I'm glad I took it off...

1671755470986.png
 
joelp said:
im replacing my covers with the ARB on the first round so subsequent rounds are easy. my rear is due this winter.
Click to expand...
I'm not seeing our trucks listed... or am I missing something?
 
I've personally never been a fan of just draining a differential via a drain plug and refilling it. I prefer to remove the cover and be able to clean out the whole inside with brake cleaner prior to reinstalling the cover and filling it. Gives me a chance to inspect the gears too. If you don't clean everything all that sediment clinging to the inside of everything will just contaminate the new fluid.
 
Ok, I have only have Chevy/GMC's (and only 1500's) so, don't beat me up when this make me sound stupid, but, these ARE Dana 60's correct???
Both front and back or is the front different?
I am going to gather oils and gaskets for my change (I heard you can use same gaskets but, not a big fan unless you can talk me into it).
30lbs of torque on pan bolts and 45lbs on plug.

So.....if I buy gaskets.....Dana 60's front and back?

Anyone use the Lube Locker Gaskets?
Thanks everyone.
 
I guess I hate to admit this but the only fluids that have ever been changed in my 07 is the engine oil fairly regularly, the coolant loss when changing water pumps and the radiator and I pretty much pumped all of the old brake fluid out once. The transmission has the atf and the rear diff has what the factory put in it about 15 years and 240k miles ago.

Early last summer while I was waiting on my 2022 to come in I had some front end work done on the 07. I was going to get it changed. But mechanic didn’t think I should change it. He pointed to one of the company vehicles, which was also a ram and said the atf and diff oil in that one has 400k miles on it.
 
Dana axles haven’t been used by Ram ever, and haven’t been used by Dodge since 2002.

You have AAM axles, a 9.25 front and 11.5” rear. There are a couple of 11.5” rear axles thou, so be sure to look for parts for the new one. It may be labeled as 11.5”/12.0” instead of 11.5”/11.8”.

That being said the gaskets are reusable, no reason to put a new gasket in. It’s more than that can be reused, they are designed as reusable. But spend your money on whatever you want.

Your truck came with the OEM equivalent of lube lockers.

slowindown said:
I guess I hate to admit this but the only fluids that have ever been changed in my 07 is the engine oil fairly regularly, the coolant loss when changing water pumps and the radiator and I pretty much pumped all of the old brake fluid out once. The transmission has the atf and the rear diff has what the factory put in it about 15 years and 240k miles ago.

Early last summer while I was waiting on my 2022 to come in I had some front end work done on the 07. I was going to get it changed. But mechanic didn’t think I should change it. He pointed to one of the company vehicles, which was also a ram and said the atf and diff oil in that one has 400k miles on it.
Click to expand...

That’s called neglect and abuse. I wouldn’t have admitted that in public.

You should name that mechanic, so we can all stay away.
 
slowindown said:
I guess I hate to admit this but the only fluids that have ever been changed in my 07 is the engine oil fairly regularly, the coolant loss when changing water pumps and the radiator and I pretty much pumped all of the old brake fluid out once. The transmission has the atf and the rear diff has what the factory put in it about 15 years and 240k miles ago.

Early last summer while I was waiting on my 2022 to come in I had some front end work done on the 07. I was going to get it changed. But mechanic didn’t think I should change it. He pointed to one of the company vehicles, which was also a ram and said the atf and diff oil in that one has 400k miles on it.
Click to expand...
I guess I hate to admit it too but I'm with ya. Getting well into my 5th decade of car/truck ownership and wrenching and never have been a diff oil changing type of guy and yet to see a diff failure. I find this seemingly low mileage diff fluid change interval somewhat surprising. I'll probably do the first one by the book if I still have the truck but after that, the interval may get a bit stretched out. I can attest to at least one AAM 11.5 rearend going to 333k healthy miles on whatever oil was in it when I bought the truck at 98k. That was in a 3500 Chevy dually with the G80 locker that got the s**t pulled out of it routinely. I used to check it at oil change time and it always seemed fine. If we were talking about limited slip equipment, I'd have a much different outlook but for normal open diffs and simple lockers, I just don't see the need for such short OCI's. Kudos to the guys that take care of their stuff, they're the ones you want to buy used trucks from, I just struggle to feel like I'm dumping money down my waste oil drum funnel.

At a couple hundred bucks a change for some of these boutique fluids that have been mentioned, kinda surprised nobody has mentioned pulling a sample for a lab test.
 
Amsoil rates their fluid for 50K miles severe and 100K miles normal use. It’s not cheap, but the cost per mile isn’t bad. Not sure yet on how often I’ll change it while I’m under warranty.

I ran their fluid 50K miles in my 05 and it would have easily gone longer, but I also had a MH cover for more fluid. With the added power I was making, and using to tow frequently, 50K miles was not a bad compromise.

I go 100K miles on the same fluid in the wife’s 4Runner. It’s on its 3rd change now (30K, 100K, 200K). We’ll see if it makes it to a 4th since the kids will be driving it more and more :eek:
 
Amsoil rates their fluid for 50K miles severe and 100K miles normal use. It’s not cheap, but the cost per mile isn’t bad. Not sure yet on how often I’ll change it while I’m under warranty.































I ran their fluid 50K miles in my 05 and it would have easily gone longer, but I also had a MH cover for more fluid. With the added power I was making, and using to tow frequently, 50K miles was not a bad compromise.































I go 100K miles on the same fluid in the wife’s 4Runner. It’s on its 3rd change now (30K, 100K, 200K). We’ll see if it makes it to a 4th since the kids will be drivng it More and more 











Tell me more about this MH cover for an AAM 11.5 diff!!
How much fluid do we use? I might look unto replacing mine.
Thanks
 
You must log in or register to reply here.
Back
Top