Question about 2005 Ford F-150

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What kind of fliuds do i use

I have a 2005 F150 4x4. I would like to change my oils in my differentials and my transfer case. Im just wondering what to use... i think its Dextron 3 in the transfer case and 80/90 gear oil in the diffs but i am unsure... does anyone know for sure? and maybe how much each takes?

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  • paul_somervi Jan 03, 2009

    yes it is a 5.4 with 3.55 ratio rear end

  • paul_somervi Jan 03, 2009

    yes it is a 5.4 V8 with 3.55 rear end

  • Anonymous Feb 19, 2009

    1999 Explorer AWD 5.0 4R70W; when the transmission shifts into OD sometimes there is very agressive "chatter", like driving over mini speed bumps. If I let up on the gas, it stops. I can make it happen by engaging/disengaging OD with switch. (could possibly be TCC lockout). The shift/vibration/chatter in normal acceleration happens at about 40-50 mph? Any ideas?



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I worked from the assumption that you have the 5.4L V8 since you did not specify, if this is incorrect then let me know and I'll see if anything changes.

Front Differntial - You can use 80W-90 or 75W-90 but 80W-90 is preferred. It holds just under 2 quarts.

Rear Differential - This calls for 75W-140. It holds just under three quarts for the 8.8, 9 & 9.75 Ring Gear differentials. For the 10.25 Ring Gear differential it takes 3.5 quarts.

I know on the Rear Differential there was some kind of issue with chattering using anything other than the 75-140 and I dont know if they had that cleared up for the 2005 model year or not.

Transfer Case uses Automatic Transmission fluid and I would HIGHLY recommend using a fully synthetic transmission fluid that meets the MERCON V spec at a minimum (Ford uses MERCON, GM uses Dexron). The transfer case takes two quarts to fill. But when Ive serviced these in the past, Ive used an extra quart just to pump it in and drain it out so that it flushes things through, then use the remaining two quarts to fill it up.

Good Luck.

Posted on Jan 03, 2009

  • Scotty
    Scotty Jan 03, 2009

    With you having the 5.4L V8, then my information is correct. The only missing information would be the size of your differential and that information can be found typically in the drivers side door jam or you could do as suggested in the first solution and get a Haynes manual. But since all the rear differentials take 75W-140, you could buy four quarts of gear oil and just have some extra left over.


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You are probably right, but you are correct to want to be sure.

Given the potential $$$+ down-side of getting inaccurate info, and the attendant damage possible, it really IS worth the $20-25 for a Chilton's, Haynes or other professionally produced hardcopy manual - - lots easier to refer to than a computer when you're out actually working on it with dirty hands.

Then you have it in writing, specific amounts of what you'll need, and probably a listing of any special tools you'll need half-way through the job (because that's usually when you find out if you need something you don't have).

You'll also know how much capacity you'll need to handle the waste oil before maxing out your container and spilling the excess all over the garage or driveway pavement. (Yes, there's a reason I'm giving you a semi-indirect answer, partly based upon experience.......(;^])

I'd normally want to be much more precise/specific in my answer, but in this case, I think you would be ill-served if I did so. Get the manual.

If I can be of further assistance, let me know. If this helps or solves the issue, please rate it accordingly.

Thanks for using


Posted on Jan 03, 2009


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