Gearbox Noise

[MuckingFuddy]

After meeting up with some of the other southern Mud-Club members last week at the Grand Canyon :lol: , I have started to suffer with alot of gearbox noise. Could this be due to the ATF being contaminated with water or mud, or have i done some major dammage :?

I plan on changing my gearbox ATF tonight, I have changed all the T-Box and Axle casing oils since going out to play and they were quite creamy :lol:  :lol:  :lol:

Your thoughts please? :P

[hobbit]

Wont do it any harm to change it if you havn't especially after a fun day, also re-check the other levels for any contanimation again. Worth a 10 minutes to find any probs then a diff change or cv later on

[MuckingFuddy]

do you think the gearbox noise could be due to the oil being contaminated?

[MuckingFuddy]

I have changed the G-box t-box & diff oils and still have noise when gearbox is under load, like a whining noise. What have i done????? do i need a new g-box?

[Xtremeteam]

what type of atf did u put in the box? dexron 2 or dexron 3?
also what box is it?

[MuckingFuddy]

its an LT77 5 speed box, i have used dextron 2 ATF.

The noise started when after some muddy water wading, up to te vents in it.

[Xtremeteam]

was the oil contaminated when u dropped it out?
might want to try some dexron 3 as this is the oil that helps the r380's when they go a bit stiff or noisy

[hobbit]

Was there much in the way of deposits in the drain plug, I'm presuming its got a magnet on it

ie, fine filings, or lumpy bits

Also from what I've read there are/is a breather on the top of the gearbox, depending on how long you were in the water, it may have drawn in water, as the gearbox was cooled down by the water

Is the whining noise from the box or diffs?

[MuckingFuddy]

The oil looked like it was mixed with water (you know all creamy) so i would say it was contaminated :? . Do you think it will get better after a bit of a run? ive only been around the block so far (Less than a mile).

I sure its coming from the box and not the diffs but without doing an Indiana Jones :lol:  i could not be too sure. the nly oil i have not changed is the engine oil as it looks ok.

[hobbit]

You could flush the oil out of the box and refill, that will take out a bit more of the muck, if the engine is the same colour, do an oil and filter change straight away, run it up, then same again, use cheap thin oil, just to flush it out, unless you have a gallon of flusing oil

Managed to mess up my l/w engine it ingested sandy water, ground the oil pump like hell, no pressure, after changing the shells and another oil pump, it had oil pressure, but is a right bucket of bolts when starting up from cold, until the oil is pumped round the engine. Got to transplant another enigne in it now

[MuckingFuddy]

I have changed all oils and the noise is still as loud as ever, it seams to start when in 2nd gear but goes away when you let go of the gas, it louder in 3rd. could this be a clutch brearing gone? (a friend suggested this)    

[hobbit]

Would have thought the clutch bearing would react on the pedal not specific gears. Dont wuote me  on that though

If it is gear related, as in certain gears it sounds like a box problem, if all gears, you could be looking further outwards, but with the contanimation in the box, got to be high on the list though