[mcatchpole77]

Please can someone help, been using my 2007 TDV8 off road today in low box HDC on, perfect all day, reversed up a slight slope, put into drive now have a horrible noise when driving, says "transmission failure, HDC fault, parking brake realease not available, suspension lowering" won't come out of low box now and horrible noise.

 

[RRToadHall]

Sorry, not much of a mind reader. What kind of noise? what have you checked? Have you followed directions in your owners manual to change the transfer case in neutral?

 

[mcatchpole77]

The Manual only states the normal procedure "foot on brake gear selector in neutral"? The noise sounds like the sound when HDC is in operation but constant?

 

[RRToadHall]

Okay, so what kind of noise are you hearing? Is it a grinding as if the transfer case motor is attempting to change from low to hi and didn;t quite make it? Is the indicator switch properly lit for low range or is it showing high range... or are either flashing? You need to give us a bit more info than "horrible noise".

 

[mcatchpole77]

Yes it is a grinding noise, low light is flashing and it won't go into hi range

 

[RRPhil]

Hopefully this isn’t your issue but just so you’re aware, due to a lack of anti-seize grease being applied during assembly it’s not uncommon for the splines on the output shaft on the 6HP26 to fail through fretting corrosion.

Photo from rar110 on fullfatrr.com

Phil