View Full Version : What would happen if the dip$hit P/O put....
The Anti-Chrysler
12-08-2003, 03:24 AM
Gear oil in the NP-208 transfer case? :rolleyes:
I'm planning on draining it out to put ATF back in, but I'm also in fear it might have been done to cover up a problem - or that putting in gear oil might have messed something up, or if it's never going to get all the way out unless I flush the thing about 10 times???? :confused:
Crazy_Jeepman
12-08-2003, 03:28 AM
Lot of times P/O's will mistake the 10WT motor oil used in some of the 208's from factory as gear oil. Or maybe it is Motor Oil you are looking at now. At anyrate I have drained gear oil out and went to 10WT with no problems. Going to ATF might take a bit to flush, but not to bad. Its usually pretty clean in the T-Case.
Cowtit
12-08-2003, 03:31 AM
Whoa whoa whoa!! So I'm not supposed to use gear oil in my 208? This is news to me, what should I be using? I'm in the process of changing the chain and will be refilling it soon. thanks.
Crazy_Jeepman
12-08-2003, 03:33 AM
Put back what was in it, if ATF comes out use ATF, if 10 WT Motor oil comes out use that. If its undetermined.........I would use the 10 WT. Its what I do right or wrong ;)
bigun
12-08-2003, 03:36 AM
<---- glad he has Dana 20 no worries as to what to use LOL
Cowtit
12-08-2003, 03:37 AM
Why are you not supposed to use gear oil?
Crazy_Jeepman
12-08-2003, 03:42 AM
Because God said not to. ;) Actually I beleive there are no Chain Drive T-cases that use Gear Oil. Not in Jeep anyhow.
No not gear lube...
The early 208's called for 10w-30 "motor" oil. NP changed the recommended fluid to ATF Dexron type in 81 or 82. The early/late 208's are identical though, same bearings/seals etc so either juice works. I'd go ATF over the motor oil but that's just me. Gear lube is in the 85W range and higher and not recommended. I doubt the bearings would be getting oiled properly running gear lube and it would be a real mutha to shift when cold up in the frozen north.
Pete's correct there are no modern day chain drive tcases that don't require ATF. Only exception being the older BW QT's that used the QT secrect sauce or a 30w motor oil/LSD modifier mix and when those are converted to part-time the req ATF Dexron type also.
The Anti-Chrysler
12-08-2003, 04:50 AM
Yeah, all the other ones I've had run ATF. It's definitely in the variety of 85w-90 gear oil that the D/S PO put in it. I was indeed fearing it was waaay to thick for a chain driven case, and now I'm hoping I'm not going to have to flush it 10 times to get all the gear oil out. I've never seen what ATF and gear oil look/act like mixed????
The Anti-Chrysler
12-08-2003, 04:53 AM
Originally posted by -joe:
No not gear lube...
The early 208's called for 10w-30 "motor" oil. NP changed the recommended fluid to ATF Dexron type in 81 or 82. The early/late 208's are identical though, same bearings/seals etc so either juice works. I'd go ATF over the motor oil but that's just me. Gear lube is in the 85W range and higher and not recommended. I doubt the bearings would be getting oiled properly running gear lube and it would be a real mutha to shift when cold up in the frozen north.As far as the shifting, first time I was suspicious of the case (before I knew what was in it), because I noticed that it will make funny knocking noises if in 4 wheel drive with the front hubs unlocked. It seems to act / sound fine however when the hubs are locked, and the 4x4 works good...
:confused:
Jason, if you've got gear lube in there now get the tcase good and warm and let the gear lube drain out overnight. If you've got a tbl spoon or so of gear lube left in there it won't hurt anything. I really don't think you need to flush it. I'd maybe run 10w-30 for the first fill up then after a awhile drain it thoroughly and then switch to ATF but other than maybe a bit stiffer shifting on cold days running 10w-30 motor oil works too.
The Anti-Chrysler
12-08-2003, 05:04 AM
Sounds like a good idea. I was definitely going to get it good and warm before I tried to drain it, as it's like molasses when cold. I agree maybe it would be a better idea to transition the oil first to (detergent) motor oil, and not put the case in total shock!!
andy d
12-08-2003, 09:18 AM
atf is high detergent oil i thought. why bother with the 10-30?
79_Limited
12-08-2003, 01:29 PM
Don't feel so bad. I paid a recommended offroad guy to rebuild my Quadratrac. Guess what he refilled it with? Yep gear oil. Luckily it was not really driven (that I know of) with it in there. I switched back to the QT fluid. Honestly if it weren't for you guys I would not know the difference. People just don't know how quirky the Jeeps can be.
badaboom
12-08-2003, 01:37 PM
Boy I hope none of the above noted licensed mechanical experts get medical licenses.
Or maybe I will just stay healthy.
Rick@battlement
12-08-2003, 02:16 PM
Thin the gear oil with diesel fuel first,Then drain it. Then fill it back up with diesel, run for a few miles, drain and fill with ATF.
Not as important as a blood transfusion. Wrong fluid there and its over.
Bobbo
12-08-2003, 02:47 PM
Yeah no big deal if the wrong fluid was used, but if it's to cover up a problem, well...... No big deal, your out a few bucks in ATF, and you get to rebuild your T-case.
The Anti-Chrysler
12-09-2003, 12:03 AM
Originally posted by Bobbo:
Yeah no big deal if the wrong fluid was used, but if it's to cover up a problem, well...... No big deal, your out a few bucks in ATF, and you get to rebuild your T-case.I guess there's only one way to find out - maybe it's a good thing I have extra cases.... :rolleyes:
letank
12-09-2003, 10:43 AM
i would not worry too much.... put a quart of the fluid that is supposed to be there, after it has drained for 30 min.... so ATF it be. It is fairly fluid..... little bits of different oil.... it is oil.... it will mix.
Make sure you have no chunks in the oil.
ATF or 10W30, does not really matter. It is a good lubricant. This is not rocket science, just some big gears...
Cheers
Michel
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