HZJ75RP Oil passing from Transfer Case to Gearbox

Submitted: Thursday, Apr 15, 2010 at 22:44

ThreadID: 77743 Views:15650 Replies:5 FollowUps:9

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pdm3006

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 ?

FollowupID: 683111

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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FollowupID: 683119

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.

FollowupID: 683158

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

FollowupID: 683201

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.

FollowupID: 683203

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.

FollowupID: 683204

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!