noob to dodge differential fluid ?

99ram360 · Dec 1, 2011

hey im new to the forum and new to dodges, i just picked up a 99 dodge half ton extended cab long bed its all running and has a sticker just needs tinkering. but i noticed the differential cover was leaking i just wanted to know what im suppose to use for fluid and if theres any additives. thanks

txbass06 · Dec 1, 2011

This is what I used

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99ram360 · Dec 1, 2011

haha beautiful that works perfect. thanks

txbass06 · Dec 1, 2011

No problem bud. Just make sure you get the diff additive when you do it. Not sure if you can tell from the pic but that's the two small white bottles

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Mopar1973Man · Dec 1, 2011

Hmmm... I've just bought a 5 gallon bucket of Mobil One 80w-90 Gear lube.

I buy in bulk for much less... :naughty:

5 Gallons - 10w-30
5 Gallons - 15w-40
5 Gallons - ATF
5 Gallons - 80w-90

Total $320.00

99ram360 · Dec 2, 2011

is there a special attitive i should use? and i wish i could buy in bulk like that it would be so much cheaper

Mopar1973Man · Dec 2, 2011

99ram360 said:
is there a special attitive i should use? and i wish i could buy in bulk like that it would be so much cheaper

If you got a limited Slip rear end then you need the friction modifier to add to the gear lube or just buy gear lube with the friction modifier. When you have the diff cover off you know what you got...

99ram360 · Dec 3, 2011

ya i assume it probably has a limited slip but i havent checked ill do it this week

V-10 RAM · Dec 3, 2011

Mopar1973Man said:
If you got a limited Slip rear end then you need the friction modifier to add to the gear lube or just buy gear lube with the friction modifier. When you have the diff cover off you know what you got...

I believe ALL MOPARS with limited slip diffs need a Modifier added. Even the synthetic gear oils that are suppose to meet limited slip specs.
I say this because somewhere in one of my MOPAR vehicles owners manuals it says to add a modifier PERIOD. I don't remember the exact wording but that was the point.
Most of the newer Mopars call for synthetic gear oil. But I run dino in my Jeep GC 5.9 limited with out any trouble.
Under your hood towards the grill should be a list of equipment ie: which diff, gear ratios, paint code, etc.
You should buy an owners manual they are cheap like $14 on ebay. There is a world of info in those manuals. In fact maybe 50% of the questions asked on these forums are in the owners manuals.

Mopar1973Man · Dec 4, 2011

You should buy an owners manual they are cheap like $14 on ebay.

How about FREE and a full Factory Service Manual???
Download PDF Dodge Ram 2001 Service Manual | PDFTown.com

I'm using Mobile One 80w-90 GL-5 lubricants for the last 190K miles with zero issues... Change fluids every 30K.

DESCRIPTION
A multi-purpose, hypoid gear lubricant which conforms to the following specifications should be used. Mopar Hypoid Gear Lubricant conforms to all of
these specifications. SAE ratings also apply to multiple grade gear lubricants. In addition, API classification defines the lubricants usage.

FRONT AXLE
² The lubricant should have MIL-L-2105C and API GL 5 quality specifications.
² Lubricant is SAE 75W-140 SYNTHETIC gear lubricant.

REAR AXLE
² The lubricant should have MIL-L-2105C and API GL 5 quality specifications.
² Lubricant is a thermally stable SAE 80W-90 gear lubricant.
² Lubricant for axles intended for heavy-duty or trailer tow use is SAE 75W-140 SYNTHETIC gear lubricant.

NOTE: Trac-lokY and Vari-lokY equipped axles require a friction modifier be added to the lubricant.

CAUTION: If axle is submerged in water, lubricant must be replaced immediately to avoid possible premature axle failure.

V-10 RAM · Dec 4, 2011

Mopar1973Man said:
How about FREE and a full Factory Service Manual???
Download PDF Dodge Ram 2001 Service Manual | PDFTown.com

I'm using Mobile One 80w-90 GL-5 lubricants for the last 190K miles with zero issues... Change fluids every 30K.

DESCRIPTION
A multi-purpose, hypoid gear lubricant which conforms to the following specifications should be used. Mopar Hypoid Gear Lubricant conforms to all of
these specifications. SAE ratings also apply to multiple grade gear lubricants. In addition, API classification defines the lubricants usage.

FRONT AXLE
² The lubricant should have MIL-L-2105C and API GL 5 quality specifications.
² Lubricant is SAE 75W-140 SYNTHETIC gear lubricant.

REAR AXLE
² The lubricant should have MIL-L-2105C and API GL 5 quality specifications.
² Lubricant is a thermally stable SAE 80W-90 gear lubricant.
² Lubricant for axles intended for heavy-duty or trailer tow use is SAE 75W-140 SYNTHETIC gear lubricant.

NOTE: Trac-lokY and Vari-lokY equipped axles require a friction modifier be added to the lubricant.

CAUTION: If axle is submerged in water, lubricant must be replaced immediately to avoid possible premature axle failure.

That works too. I like to have mine in book form so I can drag it out no matter were I'm. I have had to use mine in the middle of the desert 70 miles or more from anything were a cellphone was only good for throwing.

Mopar1973Man · Dec 4, 2011

V-10 RAM said:
That works too. I like to have mine in book form so I can drag it out no matter were I'm. I have had to use mine in the middle of the desert 70 miles or more from anything were a cellphone was only good for throwing.

That's a rather large book at over 2,900+ pages if I remember correctly. I hardly doubt you keep that big **** book in the truck...

I'm also living in a area where a cellphone is worthless too. Home is just over the second ridge...
http://i52.tinypic.com/28vese1.jpg

JeffBeck · Jan 6, 2012

Hello, I have a related question... I just bought a 2004 Quad Cab wit 206,624 miles on it. It needs lots of TLC. I think I will change the Differential fluid front and back. My Son sings praises about Lucas products, may go with those. I still have to figure out if I have a Limited slip or not. Any advice on that would be great. I decoded the VIN..Its not there. I also am wondering how much fluid I might need to buy to do the job.

Mopar1973Man · Jan 7, 2012

Hmmm... I think it going to be right around 1 gallon for the rear diff. at least my 02 Dodge is...

noob to dodge differential fluid ?

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