Whining from drivetrain - front diff ? (1 Viewer)

[pete100]

Something in my (1999 LC100 VX 4.2TDI IFS manual transmission) is whining on upon acceleration and over run (quiter under no load). I last changed the diff oil F&R ~3000km ago, and all look perfect. However on a hunch I drained the front diff, and the magnetic drain plug now resembles a christmas tree :-/ See attached image. I guess this is the cause of the whining, and the front diff is dead. Only 300,000 km on the clock, so I'm a bit surprised. Haven't done any off-roading in since last oil change, just snow/icy roads.


/Pete

 

[vkfzj80]

looks like it's time to take it apart to see see what kind of damage you got in the diff

 

[SanDiegoCruiser]

It doesn't take much to grenade the two pinion diff. In snow, a spinning front wheel that all of a sudden gets traction will do it.

 

[pete100]

I removed the front prop shaft, locked the centre diff, refilled the front diff oil, and went for a short test run. No whining

So now I need to rebuild the front diff. But I looked through the procedure (link below) to isolate the diff from the road wheels too, until I get time. However what I don't understand here is that in the normal mode, the flange, snap ring and drive shaft all rotate together. So surely if the flange is removed then the drive shaft & snap ring will no long be held centred, and thus rub on the hub/housing (wearing very very quickly) ? And the same if I machine the spines out of a spare set of flanges and use them ?

http://tlcfaq.com/main/2012/06/front-drive-shaft-flange-removal-on-the-trail/

Sure I'm being stupid here, or ?

/Pete

 

[SanDiegoCruiser]

If the front Drive shaft is removed as well as the flanges, then nothing is going to rotate except your wheel...

 

[Muddy Bean]

My writeup that I don't think ever became a writeup

https://forum.ih8mud.com/showthread.php?t=794740

Sent from my iPhone using IH8MUD while navigating gnarly trail. Typos are inherent.

 

[pete100]

machined flanges...

See attached image from FSM. I guess this is from a rigid front axle, but it's the Toyota 100 series front hub locks. Instead of carrying around machined flanges, and the hassle of swapping them in situ upon a front drivetrain failure. Maybe it's possible to just grab a set of these parts, and mount them pre-emptively ? Then it's just a 2second job to jump out and (de)activate them. Might be a bit overkill in addition to a stronger ARB diff, but still. Anyone got prices for these parts, or know if they actually fit an IFS 100 ?

/Pete

 

[rompin2001]

See attached image from FSM. I guess this is from a rigid front axle, but it's the Toyota 100 series front hub locks. Instead of carrying around machined flanges, and the hassle of swapping them in situ upon a front drivetrain failure. Maybe it's possible to just grab a set of these parts, and mount them pre-emptively ? Then it's just a 2second job to jump out and (de)activate them. Might be a bit overkill in addition to a stronger ARB diff, but still. Anyone got prices for these parts, or know if they actually fit an IFS 100 ? /Pete

AVM Hubs Slee Offroad sells them $860