On some hills, when i knock it in to neutral, the lorry goes at about 70 mph or more if loaded or empty, but on some hills , i slow down almost to a stop and knock it back in to gear to get going again ?
There is few in Scotland where this happens, where i slow down on a long and very steep slope going down hill .
The M5 going South from Bristol to Bridgwater, a few slow you down in neutral, then others you can fly down .
Let us all know who you work for your, registration number so we can avoid being near you like the plague.
Can’t answer your query, but I’m still getting used to the cruise on our new Scania’s dropping it into neutral just before you go over the brow of a hill 
If you knock it into neutral going uphill you’re gonna come to a stop.
Normally because the hill is nowhere near as steep as it looks, it is an optical illusion created by the surrounding terrain.Probably the most famous example is Electric Brae in Ayrshire where vehicles appear to roll uphill.
It’s an optical illusion. Some hills look flat, some flat roads look as though there’s a slope.
You propably have a built in wobble in your eye, so when you think the road goes down, it actualy goes up.
This can be rectified by squeezing your left index finger across your back behind your right earlobe while singing walzing mathilda, but only dressed in a flat cap.
It is my own lorry, it only happens going down hills and not up the hills .
Romanian tractor unit pulling a Turkish trailer .
anisboy-select AP on your gear selector and it should stop the eco thing where it coasts just prior to the top of a hill.
(Although some firms have it ‘locked’ in AE like NFT).
Obviously air drag: some of your tyres have got some tread left on em causing resistance. When theyre all worn down to slicks you`ll be able to go much faster. Works in F1 dunnit.
I did know the reason for this , I was keeping mum just in case the brains think it would be a good idea to fit another gauge or warning device …more money
toby1234abc:
On some hills, when i knock it in to neutral, the lorry goes at about 70 mph or more if loaded or empty, but on some hills , i slow down almost to a stop and knock it back in to gear to get going again ?
There is few in Scotland where this happens, where i slow down on a long and very steep slope going down hill .
The M5 going South from Bristol to Bridgwater, a few slow you down in neutral, then others you can fly down .
You getting confused you’re driving a plane again?
lolipop:
Let us all know who you work for your, registration number so we can avoid being near you like the plague.
+1 coasting is illegal
Modern automatics do it all the time.
blue estate:
lolipop:
Let us all know who you work for your, registration number so we can avoid being near you like the plague.+1 coasting is illegal
It’s not a good idea, and the Highway Code advises against it, but I don’t think it’s actually illegal in the UK.
blue estate:
lolipop:
Let us all know who you work for your, registration number so we can avoid being near you like the plague.+1 coasting is illegal
It doesn’t say that in the highway code, It definitely isn’t a “Must Not” don’t even think it is a “Should Not”
no idea about nowadays, but it used to be an offence under “failure to be in control of the vehicle” or some such catch all law, a long time ago.
On a more certain note, it is bad practice and can lead to some hairy moments. IIRC, doesn’t the gearbox oil pump run from the engine crankshaft input, thus low revs equals low oil supply.
I suppose that on up to date trucks that have neutral as a programmed option that the oil issue has been solved.
2
Manual gearboxes dont have oil pumps, they just rely on the old fashioned splash principle of the gears sloshing the oil around…
I’ll take your word for it, but isn’t that why you drop the propshaft or draw a half shaft when being towed ?