Transmission

[jujibelly]

Hey, now today car overheated pulled over to have a look and I couldn't see anything around engine bay area but there was massive amounts of coolant on the floor wtf i thought.

Searched around and found that top left corner of the transmission (where the gasket is) is pissing out coolant I'm like wtf cos I checked the trans dipstick but no coolant was present.

So I thought about it and couldn't think of a logical explanation but radiator leak/trans cooler but that theory went out the door cos of no coolant on dipstick.

Car is undrivable cos it dumps all the water in a matter of seconds(It's just like a burst water hose) and makes the car overheat.

I need help lol anyone got any ideas?

Edit: It's a auto Vt btw

[Brett_jjj]

Theres welch plugs at the rear of both heads that could be leaking.And theres an alloy plate at the rear of the engine in behind the transmission bellhousing that can corrode and leak coolant.The transmission has to come out if its this plate is leaking coolant..

[poppva1]

There has also been many small bug fixes and tweaks on the back-end to improve the speed and reliablity of all the supported applications

[jujibelly]

The welch plugs and the rear main alloy plate are not the cause of the leak, it's coming from the trans gasket, top left corner. The RMS plate was replaced due to a rear seal leak so that's definitely not it.

[Calaber]

There has also been many small bug fixes and tweaks on the back-end to improve the speed and reliablity of all the supported applications

Push off, dimbulb.

[rb26dett]

There has also been many small bug fixes and tweaks on the back-end to improve the speed and reliablity of all the supported applications

It is amazing, you are saying what I am thinking even before I think it!

[Darren_L]

if there's coolant on the floor of the car, then your heater core is leaking
that would also account for the coolant dripping from your transmission. The heater/air con box drain tube exits from the trans tunnel above the transmission. So it's probably dripping on the trans and running down the side.

heater core replacement is a dash out job. Short term solution is to disconnect your heater hoses until you get it fixed

[D3V14NT]

I was under the impression that there is no gasket between the transmission bellhousing and the engine as it isn't a sealed area? The only things back there that would be leaking from the engine are the above mentioned plate and welsh plugs. However I'm way more likely to agree with Darren_L, definitely sounds like the heater core is leaking and dumping the coolant out the drain pipe.

[jujibelly]

There is no gasket between engine and transmisssion, it is leaking from the transmission sump gasket. That was my inital check after seeing no coolant around engine area, but not a single drop of moisture around heater core area.

[nathanVY]

If there is coolant leaking out your transmission sump gasket then it must be mixed with transmission fluid. If that's the case then the likely cause is the radiator has had a fault inside, I think the tanks inside can crack or something allowing the trans fluid and coolant to mix... The leak may have been caused from the overheat. - Coolant mixing with oil would cause it to overheat, Had this happen to me before but not in a holden.

If that's going on your need to dump and thoroughly flush all your oil, trans fluid and coolant. Especially the transmission.

Good luck.

[jujibelly]

See I already know the common symptoms of a trans fluid leaking internally in a radiator but the problem is that there is no coolant on the transmission dipstick (the fluid is still at optimum level, clean and red still) but therein lies the problem.

[nathanVY]

See I already know the common symptoms of a trans fluid leaking internally in a radiator but the problem is that there is no coolant on the transmission dipstick (the fluid is still at optimum level, clean and red still) but therein lies the problem.

Not sure how coolant can be leaking out the transmission pan gasket then..

[D3V14NT]

Can always drop the pan to confirm if there is coolant in there or not. But you would think that it would show on the dipstick if it's leaking out from the pan gasket. Maybe try removing the trans lines from the cooler and topping up with water to see if it flows out from the trans line fittings.

It's possible that the heater core is leaking with the majority of coolant running out the drain pipe with the remainder drying off the heater quickly due to the heat. When you lost all the coolant was the heater tap open at all? Shouldn't have any flow into the heater core if the tap is closed.

[Darren_L]

There is no gasket between engine and transmisssion, it is leaking from the transmission sump gasket. That was my inital check after seeing no coolant around engine area, but not a single drop of moisture around heater core area.

just to clarify by 'coolant on the floor' do you mean there is there coolant on the floor inside the car ?
if there is, then the only thing it can be is the heater core. You won't necessarily find moisture directly under the heater case because the case has a sump which usually drains out the drain tube or if it's bad enough it will overflow out the floor vents onto the floor. There is no other way coolant will get on your floor unless you literally spill a container of coolant on the floor....

[nathanVY]

I'm thinking it's probably leaking somewhere else and dripping near the pan gasket making it look like it's leaking. The only way for coolant to leak out the transmission pan is for it to be mixed with transmission fluid (there is literally no other way). Possibly heater tap or coolant hose at the rear of the engine has split/cracked and is leaking and dripping down the back. As suggested possibly the heater core (if it is inside the car then it's definitely the heater core)

[jujibelly]

just to clarify by 'coolant on the floor' do you mean there is there coolant on the floor inside the car ?
if there is, then the only thing it can be is the heater core. You won't necessarily find moisture directly under the heater case because the case has a sump which usually drains out the drain tube or if it's bad enough it will overflow out the floor vents onto the floor. There is no other way coolant will get on your floor unless you literally spill a container of coolant on the floor....

Nah no coolant at all inside cabin.

Yeah it's got me stumped, I am going to drop the trans sump sometime during the weekend and see wtf is going on. Will let you guys know if I find anything interesting haha.

[delcowizzid]

theres no water in the transmission at all the closest point of water is the rear of the engine ide say its tracking along the bellhousing and onto the box or leaking out of a heater hose down the firewall onto the box.trans fluid would be pink milky milkshake all ready if it was inside the tranny pan