Landcruiser Gearbox

Dunno mate. Don't think so, as there will always be some oil in the gearbox or transfer box.

I fitted a bypass hose from the transferbox to the gearbox on my old FJ55. This was just after I had bought it with 295,000 on the clock. This system worked very well for the next 255,000km. Mine used to pump the oil from the transfer box into the gearbox. The bypass hose let the excess oil run back into the tranferbox. I had no mechanical problems with either gearboxes in the 7 years I had the old rust bucket.

Cheers

Yep me to Willem, I have a bypass hose on both of mine, never been a problem.
Oil goes to gearbox as Willem said, so as the transfer holds less oil, it may run a little low at times.

Cheers Pesty

Yep common problem even with the old hilux's like myn,can buy a bypass hose with proper fittings on either end off ebay for $35. They are always on there. Not worth pulling apart and replacing the gasket/seal as it will do it again. Regards Steve M

Lets back up a bit.
If the oil is flowing downhill to the t/case ,it will not run back uphill to the gearbox through the bypass hose
.
The bypass hose only works when higher pressure in the t/case makes the oil run up hill to the gearbox and then it can run back downhill by gravity when you stop.

The pressure in the oil chamber is only my theory ,I have never tested it however fluid does not run uphill without something pushing it.

If its not pressure build up it must be the spinning of the out put shaft pumping it up hill

A timely post for me ...........................

I have just yesterday ordered said transfer/gearbox hose from eBay [at $35 free delivery!] to protect my '92 !HZJ75 Troopy .

Young brother in Adelaide recently drove from ADL to SYD, hearing a "clicking sound" whilst under way, which disappeared when at speed. [Vehicle is a 1996 Landcruiser Series 80.] Decided to get it checked out and called into a Toyota dealer on Parramatta Road.

Shock and horror ............. no oil in the transfer case, thus everything was nigh on bleep tered to bit, neccessitating a complete gearbox replacement .... this was only discovered AFTER it was pulled apart and laid out on the workbench.
Because the repairer was an official Toyota dealership, policy dictated that they cannot fit second-hand ... must be new and Toyota sourced. Naturally none in Australia ................... had to be ordered from Japan, with an attedant three to four weeks delivery time ....... airfreighting was not an option !!!
At this stage, esimated cost ......... around $5000.oo !!!
Further cost has been two airfares SYD to ADL, four weeks without a vehicle in ADL [has lots of family committments !!] and now two more airfares back to Sydleney to collect the vehicle. Plus accomodation, etc. etc . ???

So I just got scared of what could happen in my situation .....doddering old pensioner almost ......... out in the wilderness looking for gold ..... by myself perhaps .... but reasonably competent in most situations, except mechanical engineering !!

My Troopy only has about 140,000 kms on the clock ........ but for me a $35 hose gives a bit of peace of mind ??

QUESTION 1 ..... are there any pitfalls in installing said hose, when the gearbox seal is still intact ??? Or does one wait ??

QUESTION 2 .... do these seals just go 'phyttt' and let go or is it a gradual thing ?

QUESTION 3 ... will I find enough gold to get a NEW Troopy and stop worrying?

AS usual, this forum has been of immense help to me ......... yes, I have in fact worn out the SEARCH button, there is such a mine of good advice avail. here ......

Having invested much of my life as 'a lover and a bighter' ...... I neglected to enhance my mechanical knowledge, now I'm paying for it .......
BUT Ahhhhhhh , such memories, such memories !!!!!!!!!

Please advise ................ thanx in advance.