HZJ75RP Oil passing from Transfer Case to Gearbox

Submitted: Thursday, Apr 15, 2010 at 22:44
ThreadID: 77743 Views:10667 Replies:5 FollowUps:9
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Greetings all !
I have a HZJ75RP tray back ute, 1HZ diesel, H55F gearbox, standard transfer case. Don't know what model number the transfer case is.
What I have noticed is that if I drain and refill the gearbox and transfer case, then check it after a few thousand kms, the oil level in the transfer case is low BUT the gearbox oil level is high.
I last checked the levels this week.
Removed the transfer case filler bolt, stuck my finger in and sure enough low oil so I topped it up.
Removed the gearbox filler bolt, and about 750mls of oil came out.
It seems that some of the oil from the transfer case makes it's way into the gearbox.
Is this normal ?
Is this something I need to be concerned about ?
Thanks in advance for your advice.
Peter.
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Reply By: Motherhen - Thursday, Apr 15, 2010 at 22:51

Thursday, Apr 15, 2010 at 22:51
Hi Peter, pretty common with the older model cruisers. Our mechanic just fits a bypass hose to take the oil back - saves constantly replacing the seal.

Motherhen
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Follow Up By: pdm3006 - Thursday, Apr 15, 2010 at 22:55

Thursday, Apr 15, 2010 at 22:55
I'd like to know more about this hose connecting the oil between gearbox and transfer case !
Could you give me some details please ?

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Follow Up By: Motherhen - Thursday, Apr 15, 2010 at 23:05

Thursday, Apr 15, 2010 at 23:05
Hi Peter, not being the mechanical one, i can't I'm sorry; i just know that they fitted some sort of bypass to return the oil - i didn't see what it looked like. It has been discussed here previously so you may find more about it on a search, or if the same people who gave better replies than mine are still around. Otherwise your mechanic should know all about it as it was quite common. What year model is your Cruiser?

Mh
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Follow Up By: Member - Ed C (QLD) - Thursday, Apr 15, 2010 at 23:40

Thursday, Apr 15, 2010 at 23:40
Here ya go >>

"Lazyman" fix-it kit

:)
Confucius say.....
"He who lie underneath automobile with tool in hand,
....Not necessarily mechanic!!"

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Follow Up By: Motherhen - Thursday, Apr 15, 2010 at 23:44

Thursday, Apr 15, 2010 at 23:44
Good on you Ed.

Peter - the thread i was thinking of was 64570 if you haven't found it.

Mh
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Follow Up By: pdm3006 - Friday, Apr 16, 2010 at 08:38

Friday, Apr 16, 2010 at 08:38
Thanks heaps for all your replies.

I have now bought a Lazyman Fix It Kit and by reading thread 64570 have determined it goes between the filler holes of the gearbox and transfer case.

I called my local Toyota dealer (Le Mans, Footscray) and they had no idea and wanted to pull the gearbox and transfer case out to poke around and see if they could find anything wrong.

And I called ARB and they said don't worry about it.

It's great to be a part of this great resource on ExploreOz !

Peter.
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Follow Up By: Member - joc45 (WA) - Friday, Apr 16, 2010 at 12:07

Friday, Apr 16, 2010 at 12:07
Hi Peter,
It's a bit rich, Toyota saying they needed to pull it down to see what was wrong! This has been an ongoing issue with their transfer cases since the old 60-series! A bit like Nissan telling an owner of a 3.0L grenade that this is the first case they've seen of a blow-up!
And yes, that hose kit doesn't fix the fault, but nicely fixes the problem, and very cost-effectively.
cheers,
Gerry
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Follow Up By: Member - Phil G (SA) - Friday, Apr 16, 2010 at 12:27

Friday, Apr 16, 2010 at 12:27
Toyota have a different and better solution. They replace the seal between transfer and gearbox with a double lipped seal from the auto transmission versions of Landcruisers.

The transfer hoses can be bought off the shelf at many 4wd shops - they have been around for a long time. My FJ55 and HJ47 had them.
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Follow Up By: pdm3006 - Friday, Apr 16, 2010 at 12:31

Friday, Apr 16, 2010 at 12:31
Yes it is a bit rich wanting to pull it down to see what is wrong when as people here have said, it is a well known problem.

I am half tempted to phone them again and politely let them know what I think of their service.

What have I learned ? Don't go to Le Mans Toyota for service and ask ExploreOz before spending tonnes of dollars.

Once I get the hose fitted, I will rest easy.
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Follow Up By: Member - joc45 (WA) - Friday, Apr 16, 2010 at 18:06

Friday, Apr 16, 2010 at 18:06
Hi Phil,
No doubt Toytota's solution is a better one; it fixes the design fault. It's a pity they didn't come up with it while the 60-series was still in production, rather than continue the same old fault thru several models! Still, it keeps their service depts in work.
Re transmissions, Nissan did the reverse; they had an unbreakeable gearbox in the GQ, then modified the design so that 5th gear would break. That's progress!
Now if only Nissan will come up with a solution to their grenade when the new model is released here this year!
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Reply By: Ozhumvee - Friday, Apr 16, 2010 at 07:27

Friday, Apr 16, 2010 at 07:27
Bear in mind that once they start pumping oil it is sometimes an indication of wear in the splines of the input gear and shaft.
Eventually the gear will just spins and you are left with no drive at all. BTDT twice!
Peter
1996 Oka Motorhome

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Reply By: howesy - Friday, Apr 16, 2010 at 09:24

Friday, Apr 16, 2010 at 09:24
The hilux is known for it as well. havent heard of the wear angle before i was told it was a gasket issue between the 2. My hilux used to do it and I sold it with over 200,000 of it doing it and the gearbox was fine.
I have done the conversion to my HZj75 as well but I went to pirtek and had the fittings made.
AnswerID: 413125

Reply By: disco driver - Friday, Apr 16, 2010 at 14:26

Friday, Apr 16, 2010 at 14:26
Don't worry, it's not only a Toyota fault.

Landrovers had used the same idea to fix that oil leak long before Toyota's were even invented.

Oil leaks.....another thing toyota pinched from the pom's

Don't forget that it is friday before replying.

Disco.
AnswerID: 413147

Reply By: Member - Scrubby (VIC) - Friday, Apr 16, 2010 at 19:36

Friday, Apr 16, 2010 at 19:36
G`day Peter,
My old HJ45 had that same problem and I made up my own by-pass hose using hydraulic hose and fittings. I sold the old ute with the hose still on it and later discovered that I needed one for my HJ60, bought one for about $40, then later on I got the double seal fitted and no longer needed the hose.

Just a word of caution, make sure the hose is well up as high as possible it could be a disaster if it got snagged on something and broke it away and lost the oil without you knowing.

Regards

Scrubby
I don`t know where i`m going but i`m enjoying the journey.

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