Transmission hiccup

**Eric SDV6SE** · 10th January 2021, 10:29 AM

Thanks for the clarification, appreciate it.

**Discodicky** · 10th January 2021, 11:13 AM

Originally Posted by Graeme

Are you sure that anything had overheated? Maybe the engine and/or the transmission got too cold on the over-run without any combustion to keep the engine warm.

I don't suppose it may have been the dreaded brake light switch problem throwing it into neutral?
For the sake of $30 odd bucks it would be worthwhile changing anyway as it is known to be a pain.

**Tin Lizzy** · 11th January 2021, 10:10 AM

Originally Posted by Eric SDV6SE

The ZF trans are pretty strong, so no issues there,not sure why youd be using sport and second gear, let the cars brain do the work. Cruise control and properly set up caravan brakes and HDC in really steep bits should sort it. Remember the mechatronic is adaptive.

I was guessing that cruise control would run away a bit on steep downhill, and HDC would slow me down too much??? Didn't consider combining them. I do like to feel that I'm in control of the descent when there's a house hooked up behind me though 😳

**Tin Lizzy** · 11th January 2021, 10:16 AM

Originally Posted by Discodicky

I don't suppose it may have been the dreaded brake light switch problem throwing it into neutral?
For the sake of $30 odd bucks it would be worthwhile changing anyway as it is known to be a pain.

Good thought....It actually felt like the vehicle was in neutral when I was running along a very slight decline at the bottom of the mountain. I do carry a spare switch, but hadn't considered that.

**StewG** · 15th January 2021, 12:36 PM

When descending steep long hills like Cunninghams gap with my MY13 SDV6 towing a 2.5T caravan, I've generally used the paddles and sometimes in Sport and generous use of the brake when needed. The Redarc (not Tow Pro) would be set a touch higher than normal to get the caravan brakes doing their fair share. I've never had an issue with warning lights or anything else. I often use cruise control, but find it a nuisance on roads when close concentration (of the driver) is needed, such as tight curves followed by short straight stretches. Besides that, cruise control does tend to run away on downhill stretches. The only time I had a problem is when the RH inlet manifold split and the D4 went into cripple mode with all the power of an obese Fiat 500. It was downright embarrassing to travel about 100 km doing 100 kph downhill and 40 kph up hill with a string of traffic behind. And yes I pulled over wherever I could to let them overtake.

Thread: Transmission hiccup

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