Can a gearbox get flood water if water didn't reach air filter?

[EFFECTIC DESIGNS]

My brother got his Hilux started the flood water missed the air filter by a few inches. However flood water reached the seats and it covered the gear shifter halfway and the seats etc. We are wondering if water could have still gotten into it somehow?

He drove the pickup for 12 miles today and it worked fine.

[kamakazi]

My brother got his Hilux started the flood water missed the air filter by a few inches. However flood water reached the seats and it covered the gear shifter halfway and the seats etc. We are wondering if water could have still gotten into it somehow?

He drove the pickup for 12 miles today and it worked fine.

Yep... If the gearbox has a breather there is a possibility water can get into it, as well as the diffs

[EFFECTIC DESIGNS]

Hmm could he have done any kind of serious damage by driving it 12 miles?

How do we check to know if the gearbox has a breather or the diffs etc? it is a TCH Hilux 4WD single cab, 2007 model

The engine and transmission in the civic has a lot of water the entire car was completely submerged in the flood so he wash out the mud from the brain box and put it to dry and he will bring a mechanic to see if he could get that thing started.

[Ted_v2]

well its not a bad thing to check the fluids.

[pugboy]

they have breathers and go just below the underbody, so likely water got in but not catastophic

if water got in the oil would be all milky messed up looking
you could just remove the drain plugs slightly and let some drain out and see the condition.
they need a 22mm or something like that socket.

[88sins]

water definitely could get in the gearbox, wouldn't see the worst effects of it until driving for a long time.
good time to park it up and change all the fluids and check all seals before taking it on a long run.

wrt the ecu, i believe once nobody tried to start the car while the ecu was under water it should be ok. if you can, open it up and wash it out GENTLY with clean running water, then flush it thoroughly with isopropyl alcohol and leave it in the direct hot sunlight to dry out. can use a blowdryer after to make sure there's no moisture bridging any electrical contacts that shouldn't be contacting. if when you reconnect the car won't start it doesn't have to be the ecu tho,


plenty ppl feeling it raw from this setta flooding. hope insurance companies don't start braksin when the claims start rolling in

[pugboy]

yeah better change the fluids to be safe esp as that vehicle have some age

it needs

5 qt 75-90w gl5 type oil for both diffs, gl5 is important here
4 qt 75-90w gl4 oil for the gearbox and transfer case

they cost around $90-120/qt depending on where you go

best done by a place with a lift, the front diff requires a 10mm allen key to remove the fill and drain plugs
and a pump type thing to fill as its tight to get in there
my mech used a pump powered by a drill, some use a pump which looks like a giant injection needle

[ramishrrr]

What kamikaze says have some weight.

Usually a gearbox will have a vent.
From cold, when the gearbox heats up with use, the air inside will expand.
If there is no vent, then the internal pressure will cause it to leak .....somewhere.
Possibly through a seal etc.

When a pressure cooker is removed from the stove, and place under the tap the pressure falls dramatically.
It will fall until there is a negative pressure inside.
This is because the hot vapour inside cools.

With the gearbox, suddenly immersing it in cold water will cause the hot air, and possibly vapour inside to rapidly contract.
There could be a vacuum.
If the vent is below water, logically it will suck water inside.

Water makes an emulsion with oil.
If there is a drain check to see if milky stuff is coming out.

Regards,
RR.