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Oil Change Ready to change the oil in your Dodge Ram? Engine -Trans - Differential - Transfer Case


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  #11  
Old 10-10-2011, 12:22 PM
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Ok, we have gone this round before, so maybe lets try again...

Because Petroleum based Oils and lubricants ALL BREAK DOWN over time.

I pulled the front axle drain plug on one of the trucks in the motor pool the other day and it was black and the consistency of 5w20 motor oil. It started life 6 months ago as fresh, clean, golden 80w-90 synthetic gear oil. Granted this was a 30,000lb military grade up-armored 6x6 Freight-liner rig, but still.

Oil breaks down over time. Do you have any idea how hot the inside of your differentials and transmission gets? Heat breaks down the oil, the oil loses its viscosity over time. The thickness is where the protection is. Heat breaks it down, lowers the viscosity and it gets hotter, and the viscosity gets even lower. Eventually, your gears in the diff and/or the splines on your axles are shot due to inadequate lubrication.

If you do not tow anything, change it every 50,000 miles at a minimum. I change it whenever I service the transmission. I just had the transfer case, and both differentials done for $181. If someone cant afford $200 for maintenance every 50,000 miles, then they need to be re-evaulating their finances and choice of vehicle.

Of course, again, this is personal choice. But I have never had an engine, transmission or differential go out. In the many years I have been wrenching, I have learned thats probably because I change my fluids regularly. Spend $2,000 replacing a rear end at 110,000 miles (JUST out of warranty) and maybe you will sing a different tune.

Fluid Changes are CHEAP INSURANCE...When in doubt, change them out!
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  #12  
Old 10-10-2011, 12:41 PM
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I agree with that ^, especially under heavy loads, racing, etc... and especially with LSD.

When I had my s10 with an open diff, and didn't use it for much more than a DD, I changed the fluid twice (every 100,000 miles), and had no problems with it.

When I drove my F100 that I ran pretty hard and it had a LSD, I changed the fluid once at about 15k miles, and it was very brown, burnt smelling, and about as thick as milky water....so it definitely makes a difference how hard you are on it...
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Old 10-10-2011, 01:10 PM
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I just read my 2009 Ram Maintenance Schedule, PAGE 506

120,000 Miles (200,000 km) or 120 Months Maintenance Service Schedule
❏ Change the engine oil and engine oil filter.
❏ Rotate the tires.
❏ Replace the engine air cleaner filter.
❏ Replace the ignition cables (3.7L Engine).
❏ Replace the spark plugs (3.7L and 5.7L Engines).
❏ Inspect the brake linings; replace if necessary.
❏ Inspect the CV joints.
❏ Inspect exhaust system.
❏ Inspect the front suspension, tie rod ends and boot seals for cracks or leaks and all parts for damage, wear, improper looseness or end play;
replace if necessary.
Change the automatic transmission fluid and filter(s).
❏ Change the transfer case fluid if using your vehicle for any of the following: police, taxi, fleet, or frequent trailer towing.
❏ Replace the accessory drive belt(s).


It never reads that the rear differential needs to be changed, it just needs to be inspected, unless you are
police, taxi, fleet, or frequent trailer towing.
I for one don't believe it, i have opened vehicle rear ends & i have seen caked fluid inside of the housing
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Old 10-10-2011, 07:43 PM
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You are required to follow the rules in your manual you got with your truck not the updated recommended specifications they staple to the back off my oil change receipt each time.Every other oil change was over a hundred bucks if you follow their schedule. I think they figure they are a Cadillac dealership and we never look under our hoods or what? I finally went with synthetic oil, cuz I am gonna go the full 6 months since I won't even put 5000kms in 6 months.
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