D4 Any Added Value of Rear Diff lock over TRS?

The diffs are by STEYR same as the transfercase , my D3 S has the E-Diff , but being old school Id love some sort of indication of what it was upto !!
The e-diff has bigger CVs
https://www.aulro.com/afvb/images/im...11/02/1176.jpg
https://www.aulro.com/afvb/images/im...11/02/1177.jpg

Thanks every one for the helpful responses - appreciated

Terrain Response is always active whether a Special Mode has been selected or not. The extra noise once TR is selected would be Hill Descent Control which can be switched off with the yellow button.

Yes always buy the e-diff. It'll make the vehicle more attractive to offroaders who will always prefer, or sometimes mandate a vehicle with it.

The e-diff makes offroad life easier, esepically on hill climbs. Unfortunately, it cannot be manually locked for descents.

I reckon a front locker in the same way wouldn't go amiss.

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Originally Posted by Disco4SE

I then selected Mud Ruts and went back through the same culverts. Every other setting was the same.
I then heard noises from the transmission, wheels etc.
I understand that it is the TR that creates 'the noises' , however the vehicle seemed to drive through the culverts perfectly without it selected :confused::confused::confused:
Cheers, Craig

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Craig,

Perhaps the noises you heard were the ABS working in Hill Decent Control (HDC) mode which kicks in when in mud and ruts, even on small down hills, this could be the noise I can think of that would be "Activated" by using Mud & Ruts.

George

Quote:

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Originally Posted by DiscoWeb

Craig,

Perhaps the noises you heard were the ABS working in Hill Decent Control (HDC) mode which kicks in when in mud and ruts, even on small down hills, this could be the noise I can think of that would be "Activated" by using Mud & Ruts.

George

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Yeah, could be right George, although there were other noises whilst cross axled that weren't without the Mud Ruts engaged?

Cheers, Craig