100 series gearbox whine? or trasnfercase?

WHO is rebuilding the gearbox????? BOB THE BUILDER!!!
I hope he realises you need to use the clutch in a manual. Don't want to sound cynical, but someONE is obviously at fault here.
Any Prado you pick puts out more power and torque than standard 100s, so many, many Prados should be just pulling off the road with gearbox failures if these are weak. Surely.
Krakka

apparently only one rebuild, under wty!. The last two have been full new replacements. Suburban use with occasional weekend away towing a camper trailer.

Just to clarify, If the noise stops when you back off this would indicate the load being taken of the crown wheel and pinion therefore no noise, I you backed off and the noise was there this would indicate the bearings catching up on them selves and that noise would be consistent with a gearbox.

Cheers Steve.

hi,
i notice it more when i back off but as soon as i put my foot on clutchh noise goes away instanttly.

was going to try and but it in neutra att 100km'hr see what hapens to noise with foot off clutch.

I spoke with the boss when I got back from lunch and he agrees it's the diff.

The reason being is, when you back of or take your foot of the clutch, the load on the crown wheel and pinion is released therefore no pressure on the gears, that means no noise.

Think of it like this,the gears in your gearbox run on a shaft, they spin on a bearing so if the bearings are gone, as I said the noise will be constant with or without you backing off,as the noise will be the bearings catching up, the diff is driven by the pinion spinning and driving the crown wheel so the pinion is forcing the crown wheel around, so when you back off the pinion backs off and just spins without pressure you put your foot down again and the pinion picks up the crown wheel and makes the noise again, because it is back under pressure.

Take it to a specialist and if I am Wrong I will pay for your membership to ExplorOz, thats how confident I am.

Cheers Steve.

I'll back what Steve is saying - it will be the rear diff (I'll go you halves in the membership steve if we're both wrong;).

I have a 01 Standard HZJ105 with 275000km and it has the exact noise you describe - that is a whine not a rumble.

Unless its really bad I wouldn't be too worried. Just start putting $100 a month away and after 6-7 months buy a recon diff centre and swap it out. I haven't even bothered saving yet ;)

OK,
i'll hold you guys too it! what about halves in a arb diff locker that way fix all my problems will be fixed! hahahaah

Haha I've got a better idea...if we're right you buy Steve and I an ARB diff lock each!! Hahaha

Every time my wife is in the car it has a whine, it seems to be coming from the passenger's seat.

Cheers Steve.

BUAHAHAHAHA!!!

now THAT made me laugh

Great diagnosis Steve,

That's what I like about this forum - good sensible help for all of us with little 4x4 knowledge..

Well done!!

Now for the bit about the missus!!!

Nnoooo!!!!... you can take the can for that my boy... Ya know those big crocs ya got up there well ya betta watch out eh but!! Choir boy maybe???

Cheeky bugger...

LOL...

Grrr!!!