Thread: Help in issue identification R380/LT230

Hello all,

Could use some help/ suggestions in how to identify the issue I am having....

Vehicle: 2005 110, (TD5, R380, LT230 with a roamer drive) with 320,000kms
I have a loud whining sound in all my gears with the whining in 5th being the loudest. On the motorway it is now louder than the engine
The whining is present when applying throttle, but goes away when I left off the accelerator. The sound is also originating from the gearbox/transfer area though I cannot tell which definitively.

Here is a video running through the gears up to about 120kph.
https://1drv.ms/v/s!AvBgCQ_FfvNXpxt8...rYSI2?e=j8vg5e

My worry is that it is a bearing going (perhaps rear support bearing).

Is there any testing I can do to identify if it is the transfer case or gearbox causing this whine so I can further isolate the issue?

Thanks Dazza, This is great and gives my some good direction. I think this will give me good direction along with discorevy's advice.

Cheers,

Originally Posted by DazzaTD5

it sounds like the transfer case to me, but...

*you could also drop the fluid out of the transfer case, check out the colour of the oil and see how much metal has collected on the mag drain plug.
*also while the fluid is out, drop the bottom plate and see how much the centre gears move around, if the bearings have collapsed you will be able to move it quite a bit and may also see parts of the bearings everywhere.
*you can also drop the front and rear shafts, turn one of the output flanges by hand and listen.
*while the bottom plate is off, you can also put a socket on say the rear output flange and if you have an adaptor spin it with a variable speed drill (I use a cordless drill that I clearly dont like as its hell on a drill and lets out a bit of smoke now and then). (yes there is enough residual oil in the box not to worry)