Thread: Discovery G.Box/T.Case whine - speed related

Originally Posted by ladas

If no lights - that would lead me to think electrical

Can't really hear the audio file at all

Glad you concur with the electrical theory - where to start (probably at pump) if someone knows if there is a common fault with these Cruise Control systems it might save me some time ;-)

Yeah, I'm sorry about the audio file. It was recorded on my laptop using its in built mic. Just turn all your volumes up and ask the family to quite down for a sec and maybe, just maybe you'll hear it.

chosen

Originally Posted by chosen

Glad you concur with the electrical theory - where to start (probably at pump) if someone knows if there is a common fault with these Cruise Control systems it might save me some time ;-)

If you have no lights - it means that the problem is before the pump - the pump is the last place to look. I'll check the diagrams.

Yeah, I'm sorry about the audio file. It was recorded on my laptop using its in built mic. Just turn all your volumes up and ask the family to quite down for a sec and maybe, just maybe you'll hear it.

chosen

You can hear a pin drop in my office - still can't hear much.

A quick check for your cruise control is the brake disconnect valve.

At the top of your brake pedal there is a vacuum dump valve, that disengages your cruise control when you brake.

I have seen more than once that the line to this falls off or splits,, the car thinks you are braking all the time(as far as cruise is concerned).
From what I can pick up an elec failure on the series one cruise is rare but the rubber hoses are getting old and split or fall off easily

Originally Posted by chosen

Glad you concur with the electrical theory - where to start (probably at pump) if someone knows if there is a common fault with these Cruise Control systems it might save me some time ;-)

Yeah, I'm sorry about the audio file. It was recorded on my laptop using its in built mic. Just turn all your volumes up and ask the family to quite down for a sec and maybe, just maybe you'll hear it.

chosen

As not to dilute this thread away from your gearbox problem I will PM the details I know regarding the cruise control.

Keep this thread on the gear box it's more important than the cruise problem.

Originally Posted by duff

A quick check for your cruise control is the brake disconnect valve.

At the top of your brake pedal there is a vacuum dump valve, that disengages your cruise control when you brake.

I have seen more than once that the line to this falls off or splits,, the car thinks you are braking all the time(as far as cruise is concerned).
From what I can pick up an elec failure on the series one cruise is rare but the rubber hoses are getting old and split or fall off easily

Thanks to all who have been giving me advice for my problems with both the whine in the gearbox and the cruise issue that was brought up during this topic.

I am pleased to inform you all that the Cruise Control is now fixed, it was as duff said, to do with the vacuum dump valve. My big boots had somehow knocked it and it was as if it was continuously braked.

Cheers,

chosen


AS THERE SEEMS TO BE LITTLE MORE ADVICE YOU GUYS CAN OFFER WITH REGARD TO THE WHINE ISSUE WITHOUT SEEING THE VEHICLE YOURSELVES, CAN ANYONE ADVISE ME WHERE IS A GOOD PLACE TO TAKE HER TO SORCE THE PROBLEM (in SA) - THEN I CAN SEE IF IT'LL BE CHEAPER TO REPLACE THE BOX?

G'day all,

I got under her today with a stethoscope and determined that the crunchy/gritty noise is coming from the transfer case - makes me much happier as it will no doubt be cheaper to repair than a gearbox problem.

I now must take it to a professional to repair/replace, anyone got anyone they can recommend for the job in SA?

Cheers,

chosen