fluid changes

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Sep 18, 2011 | 02:14 PM

2000F250guy

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fluid changes

i was going to do a oil change when i realized i don't know what was ran in there before, Rotella i think. If so would it hurt to switch to full synthetic Rotella? synthetic diff lube as well?

Thanks in advance.

Sep 18, 2011 | 02:18 PM

clintbonnie

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From: Ardenvoir, Washington

You probably already have syn in the diff.. (from factory)
According to my owners manual, maintenance guide, and I quote:
"Rear axles containing synthetic lubricant and light duty trucks equipped with Ford-design axles are lubricated for life. These lubricants are not to be checked or changed unless a leak is suspected or if axle assembly has been submerged in water.. Non-synthetic rear axle lubricants should be replaced every 3,000 miles.."
If you don't have a copy, go to:
https://www.fleet.ford.com/maintenan...ls/default.asp

No problem switching engine oil.. would suggest Rotella T6 syn, 5w40, year round.. your engine will love it..good for your turbo too..

Sep 18, 2011 | 02:22 PM

2000F250guy

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i just know the truck wasnt taken care of by the other owners, so befor winter gts here im goign to change all the fluids. Thanks for the advice.

Sep 18, 2011 | 02:25 PM

clintbonnie

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From: Ardenvoir, Washington

I added an edit to my post..

Sep 18, 2011 | 02:38 PM

A/Ox4

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From: Missouri

I use Shell Rotella T6 (Full Synthetic) 5w40 in mine.

Also, I changed both front and rear differentials. Used the Valvoline bottles, works great.

Sep 18, 2011 | 03:04 PM

RainStroked

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Joined: May 2011

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From: West ID

Synthetics are good all the way around IMO, and T6 is a great choice along with Mobil 1 TDT, Valvoline Premium Blue synthetic, Delo synthetic etc. Your rear diff requires synthetic 75w-140 and I believe the front does as well, but 75w-90 up there. As for the rest, I used Mobil 1 synthetic ATF in my ZF6 and power steering, and Valvoline synthetic DOT 3/4 in my brakes. The only one that I don't run synthetic in is my transfer case, which is Motorcraft XL-12 fluid. Truck runs great and the brake pedal feel is improved over the old stuff that was floating around in there.

Sep 19, 2011 | 01:08 PM

rufushusky

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From: Walpole, MA

Quote:

Originally Posted by 2000F250guy

You should have no issues going to synthetic oil, if you have the extra coin they are good stuff.

Your rear diff was synthetic from the factory, your front was not. I would recommend a good synthetic in both. Check your rear diff to see if you need the limited slip friction modifier. You should have an "LS" in the middle of the service tag on the diff.

How old are your other fluids? X-case, Trans, brake, coolant and power steering? Might not be a bad idea to change them too.