H55F & Transfer

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10 Year
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Jul 2, 2011
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27
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Brisbane
Recently when changing my gearbox and transfer case oil I was a little short, being isolated on a property without another ride I decided to fill the gearbox and leave the transfer (as when changing the old oil only about 300ml came out of the transfer anyway). Thinking this would be OK to drive in 2WD I headed down the street for more oil and low and behold, the transfer let go.

Having never pulled apart a H55F/transfer or any 4WD transmission for that matter before, I'm wondering if anyone can shed some light on what actually happened inside the box?

I am also now in the position of being without a drivable vehicle, which begs the question, am I able to fill the transfer with fresh oil and make it some distance without blowing anything in the gearbox?
 
Yes. Never said it would, I asked if it would damage the gearbox. I'm wondering if I can get away with running it as is to go pick up another box. I don't care if the transfer gets trashed as it's already blown and getting replaced. The oil is to keep the heat from friction down and to slow down the damage any loose parts will cause.

Do you know what part of the transfer case is engaged when in 2H and the hubs are free?
 
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diesel69er said:
what do you mean by let go, seized or just nothing there at all?
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By letting go I mean there was a loud whine and then what sounded like a build up of RPM in a gear above the motor revs and then a 'let go' where something went inside the box and started making a grinding sound. Looking underneath there was smoke coming out from the linkage boot on the transfer.
The gearbox is shifting fine between gears in 2WD and I drove it back home without going over 40km/hr.
 
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Hulsty said:
If it's that rooted who cares, chuck some oil in and drive, might last 2min or half an hour. Could damage nothing or fake out the whole gearbox.
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Yeah I figure. I am just trying to get an idea on what could have let go, so I've got a better idea of how far I might get.. Got a few options ahead of me.
 
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no disrespect mate but that was a pretty foolish thing to drain the transfercase and drive it around with no oil in it and also attempt to refill it to drive somewhere in that condition to pickup a replacement transfercase. Unless you want to muck about getting the whole truck transported back to your house with a seized or blown up transfercase park the thing up and get someone to take you out to pick it up :crybaby: :doh:
 
Bearing could size and push a shaft through the gearbox, teeth probably grind away to nothing and weld themselves all kinds of horror.

Just put it on a trailer and fix it and remember they need oil! Diffs, gearbox, engine also need oil to operate and dont drive them anywhere without.
 
When filling up your transmission did you notice that the output shaft from the transmission connects to the transfercase? Meaning the transfercase drives the rear axle at all times and then front axle when 4 wheel drive is engaged. This is why we have offset differentials. If the transfercase is hosed then you aren't going anywhere.

Consider yourself lucky you are in Australia where spare parts are plentiful and it was a transfercase instead of the transmission or worse the engine.

Had I done this myself here in Canada this could potentially pose serious downtime along with a hefty bill
 
sadam_husain said:
no disrespect mate but that was a pretty foolish thing to drain the transfercase and drive it around with no oil in it and also attempt to refill it to drive somewhere in that condition to pickup a replacement transfercase. Unless you want to muck about getting the whole truck transported back to your house with a seized or blown up transfercase park the thing up and get someone to take you out to pick it up :crybaby: :doh:
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Haha, none taken, it was a stupid mistake.. I was running on no sleep over a few days and was stressed at the time, but at least now I get to pull one apart and learn how it works :)
 
77cruiser77 said:
When filling up your transmission did you notice that the output shaft from the transmission connects to the transfercase? Meaning the transfercase drives the rear axle at all times and then front axle when 4 wheel drive is engaged. This is why we have offset differentials. If the transfercase is hosed then you aren't going anywhere.

Consider yourself lucky you are in Australia where spare parts are plentiful and it was a transfercase instead of the transmission or worse the engine.

Had I done this myself here in Canada this could potentially pose serious downtime along with a hefty bill
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Nope, but previously did know that, funny how the brain works. I'm still surprised it got as far as it did with so little oil in there to begin with.

As for parts it's the reason why I got a 75 when looking to get a 4WD. $200 for a recently reco'd box and transfer, makes it a bit more bearable.
 
Hulsty said:
Bearing could size and push a shaft through the gearbox, teeth probably grind away to nothing and weld themselves all kinds of horror.

Just put it on a trailer and fix it and remember they need oil! Diffs, gearbox, engine also need oil to operate and dont drive them anywhere without.
Click to expand...

I can't see anything welding together with oil in there, but I will let her sit until I need to move her to a workable shed.

Cheers for the replies :cheers:
 
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