How often do you guys check your t-case fluid? ive never checked mine, and its going on 6 years old and my truck has been beaten ive done alot of muddin and gone threw alot of water so i no it has to need some kind of maitmens. I no theres just a little plug on the side of it, but whats is the best brand and how full should it be? I herd Royal purple makes some of the best stuff for hard workin engines.

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i have a 2005 fx4 stock

pull off that round thing with 4 bolts on the driverside rear of the case, and then you'll see the drain plug. above and to the right of that drain plug is the fill plug. It takes Mercon ATF. I run Royal Purple in everything but the brake fluid and I find it keeps gears cooler and easier to shift.



In the pic you can see the fill. The drain is under the dampner on the left...

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'01 XLT disguised as a '03 Fx4 Level II.

Royal Purple ftw

How about the frount and rear gears how often should they be servised?? The truck only has 52k miles on it but there hard miles. i just had the tranny flushed not to long ago ang the technition told me it need a blush but there usall good for 80k.

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i have a 2005 fx4 stock

Royal Purple is awesome fluid. I personally use Lucas semi-synthetic atf..... i love it.

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2000 Ranger Super cab 4x4- 4.0/3.73's/5 Speed
TBAR max/31x10.50 Yokahoma AT/S

2005 Explorer XLT 4x4- 4.0/3.73's/AUTO

I found this thread very helpful for changing the transfer case fluid particularly the picture.

A few questions came to mind.
1) What does that round thing in the picture do? Any special care required when removing it, like marking a position?
2) How many quarts of ATF should I expect to put in?
3) Any suggestions on filling? Is a suction gun the way to go?

Thanks

1a) it's some sort of harmonic dampner. Explorers have them mounted on the rear axle too. No clue what it actually does but I assume Ford is flipper flopping because old model tcases(80's up to mid 90's) do not have that dampner thing. Yet mid 90's-current have 'em. Yet Marie's virgin '08 and alot of newer trucks didn't have it but the case had the threads for it. lol. I say it's good to go with and without it because ford thought so too.

1b) no worries on alignment or care. you can throw it off a cliff and bolt it back up and it'll be fine. lol. It only goes on one way because of that trapezoid bolt pattern.

2) 2 quarts or so

3) The way I do it, is using those normal quart bottles of ATF(almost all motor oil quarts are the same container), threading on a gear oil funnel cap(found on gear oil quarts), then fill it that way. There's PLENTY of room to do this and it's the way I do my transmission as well. I used to use a hand pump but that's crazy annoying and tiring when you have ample room to put the quart bottle up there.

good luck!

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'01 XLT disguised as a '03 Fx4 Level II.

do all t cases use atf ?
mines a 89 and i drained it to change the tranny and don't know what to put back in

yes i know stupid rookie

One idea i found really handy when changing the tranny fluid is picking up one of the 1 gallon presurized garden sprayers and cutting the hose after the trigger to put the tranny fluid in. Worked like a charm and didn't kill myself trying to pour it in.

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Purple People Eater
93 Ranger XLT
4.0L
5 spd M5OD-R1
4x4 short cab 7' bed
31X10.5 R15 GoodYear Wrangler Authority
Manual Warn Hubs