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Thread: Rear Differential Fluid Drain...Need Help Reply to Thread
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  Topic Review (Newest First)
04-21-2019 10:40 PM
Jimmy N.
Quote:
Originally Posted by URDiesel View Post
You need to clean the bottom of the housing to get the heavy crud out.
Not even Jiffy Lube uses suction for oil changes...I hope.
04-21-2019 10:31 PM
URDiesel You don't want to get brake cleaner into the bearings.
It's best to remove the cover to do a proper job, IMO!

You need to clean the bottom of the housing to get the
heavy crud out. Spraying anything into the unit will leave
residual. Brake cleaner is not what you want left in your housing.
04-21-2019 10:19 PM
Jimmy N.
Quote:
Originally Posted by T76turbo View Post
BUT, most of the crap you speak of is suspended in the fluid that gets drained or vacuum evacuated out. And that which isnt is stuck at the bottom. So unless you douche the entire area off with brake clean etc then you are doing no better than the oil extractor. Some will do that. Most will not.
If you say so. But in my experience, some of the stuff in there wouldn't necessarily fit through the tube you're using...if the tube fits through the hole for the fill plug.

It is physically impossible to get as much crap out by suction as by taking the cover off, no brake clean needed.
And now you have me wondering if I have ever seen anything "stuck to the bottom". Not counting shrapnel that has been embedded in the housing after a failure.
04-21-2019 09:58 PM
T76turbo
Quote:
Originally Posted by Jimmy N. View Post
I think the main reason for changing the fluid is to get the crap out of there, and there's no way to do that effectively by sucking the fluid out.

Most likely, they didn't put a drain plug on the axle or cover in an effort to make people actually get as much as possible out, and even provided a reusable gasket to make it really simple.

It's not a septic tank, where making room for more crap, by pumping it out, is the main objective.
To each their own obviously. Do what makes you comfortable.

BUT, most of the crap you speak of is suspended in the fluid that gets drained or vacuum evacuated out. And that which isnt is stuck at the bottom. So unless you douche the entire area off with brake clean etc then you are doing no better than the oil extractor. Some will do that. Most will not.
04-21-2019 09:46 PM
Jimmy N.
Quote:
Originally Posted by T76turbo View Post
I used a oil extractor. Pull the fill plug and suck out the fluid. You may not get every single drop from the bottom but I got the same amount they say it holds and refilled with the correct fluid. No mess at all. Not a drop.
I think the main reason for changing the fluid is to get the crap out of there, and there's no way to do that effectively by sucking the fluid out.

Most likely, they didn't put a drain plug on the axle or cover in an effort to make people actually get as much as possible out, and even provided a reusable gasket to make it really simple.

It's not a septic tank, where making room for more crap, by pumping it out, is the main objective.
04-21-2019 09:37 PM
T76turbo I used a oil extractor. Pull the fill plug and suck out the fluid. You may not get every single drop from the bottom but I got the same amount they say it holds and refilled with the correct fluid. No mess at all. Not a drop.
04-21-2019 04:16 PM
BrianF Appears to be 75w85 synthetic. Doubt its group 4 or 5, probably group 3 but made by who knows.
04-21-2019 04:00 PM
Jumpinjoe Iím sure this has been posted but Iím to lazy to look for it so here is my question, do the rams come with synthetic fluid in the diffs from the factory? Thanks for the replies
04-20-2019 08:55 PM
tankerpilot01
Quote:
Originally Posted by tankerpilot01 View Post
So Iíll change it before my trip. Then again prior to ďnormalĒ after doing some towing. As I think under severe duty amsoil says 50K with their severe gear 75W90. Not sure Iím comfortable if a lot of they was towing...to go 50K!




Sent from my iPhone using Tapatalk


Changed rear diff today. Around 850 miles. Ready to tow around 7K to OK (750 miles) in a couple weeks.

Looks good as far as I can tell....assume to look for wear/nicks/cracks, etc. a little bit on magnet but not much. Just really fine particles...almost like dust.








Sent from my iPhone using Tapatalk
04-20-2019 07:08 PM
lzhome I'm betting some of you won't agree but here is my video on the rear differential.

https://youtu.be/KDn8pQRARfI
04-20-2019 07:02 PM
Ram4Sam
Quote:
Originally Posted by Jimmy N. View Post
Speaking of diffs, after the sixth cleaning of the magnetic plug in about 5,000 miles, now the debris caught on it is looking more like it should. In other words, not all that much.

Then again, until I pull the cover there's no telling how much the extra magnet I put down low on the cover has captured
This reminds me of my younger days, in college, working at a dairy.......they gave the cows a small magnet to swallow, which stayed in their belly, to catch and hold any strays bits of wire from the hay bales.......

Sam
04-20-2019 06:45 PM
Jimmy N. Speaking of diffs, after the sixth cleaning of the magnetic plug in about 5,000 miles, now the debris caught on it is looking more like it should. In other words, not all that much.

Then again, until I pull the cover there's no telling how much the extra magnet I put down low on the cover has captured.
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