On a trucks auto box if you were going forward at 56mph on a motorway what would happen if you put the gear selector in reverse? Can someone please test it and report back.
First ever…
Full auto Skarniar that came out, I dared my mate to whack it in reverse whilst he was on the A1. He did so and all that happened was a loud beep and nuetral.
My big brother who was a van boy for Millers Pies all those years ago, worked with a complete looney of a driver who tried and was eventually successful in engaging reverse gear whilst going forwards at 50mph in a BMC van. It grenaded the gearbox and well as shooting both of them and the entire van load of pies into the windscreen.
It automatically prints your P45
Sent from goodness knows where
Nothing. Autos these days wont shift if it’s not safe to do so.
Same with most modern manuals. I’m driving for Co-op at the mo and they have a metric Feckton of 13 and 63 plate P360 Manuals. If you go for fifth and hit reverse by accident it just won’t let you do it.
When I had my 63 plate Merc, if you flicked it into reverse you got an extra 5mph out of it…very handy for a Fri or Sat to get home. (Although some clowns used it for a teararse excercise 
)
The guy who discovered it rather than just tell a few discreet mates and keep it to themselves, he gobbed off to everybody about it, until it eventually got back to those in charge…surprise surprise.
Pretty sure the mythbusters did that one with a car, automatic and manual and tried to engage reverse while driving forward and if I remember right, there was lots of grinding and clutch wear lol
On DAFs you can drop it from drive to reverse at slow speed but it wont do it until you’ve stopped. I’d assume it does the same at 55 but will drop into neutral.
Its sometimes quicker to do that than stop, wait for revs to drop and then go into reverse…and wait and wait for it to make a decision.
Obviously older ones might not do this, but 13 plate onwards do. Unfortunately I doubt it added 5mph.
Hating autos with a passion I’m not surprised that people have such malignant intent towards them. 
In my case it’s more often slamming on the brakes with my left foot instinctively going for the clutch on the rare occassions I drive one.
But only in old age for some reason not when I was younger. 
Many years ago a former employee of mine went from high range to low range in a Daf 2300.He said the engine just petered out but there were con rods and pistons hanging out of the crank case.I found out later that the inhibitor was not functioning correctly.
As most “auto” boxes are actually semi automatic, it’s likely all that will happen is the box will throw itself into neutral
Does anyone really believe that the people who write software for gearboxes wouldn’t have built in some safeguards? They won’t even let you engage a low gear if you are going too fast.
Gidders:
Many years ago a former employee of mine went from high range to low range in a Daf 2300.He said the engine just petered out but there were con rods and pistons hanging out of the crank case.I found out later that the inhibitor was not functioning correctly.
The first 3300 DAFs with the ZF synchro box fitted had the same problem.
In theory you could go from 18th (they were 18spd as far as I remember) to 1st…,.well not just in theory,.a lot of drivers actually did. 
…so then they modified them so as you couldn’t.
Scraggy88:
Pretty sure the mythbusters did that one with a car, automatic and manual and tried to engage reverse while driving forward and if I remember right, there was lots of grinding and clutch wear lol
iirc they were checking out a movie myth about the front end of a propshaft falling out would dig in and rip out the rear axle. They had trouble getting the front UJ to fail on cue, then hit on welding a big nut on the prop shaft and a matching bolt on the gearbox output shaft, threaded so putting it in reverse would unscrew the bolt almost instantly. I think it was the baldy one who expressed surprise that you could get a (car) auto box to go straight into reverse like that.
thats a …woooshhhhh!!!.. for about 9 out of 10 replies…
troll feeding at its best…well seen its a saturday night. 
dieseldog999:
thats a …woooshhhhh!!!.. for about 9 out of 10 replies…
troll feeding at its best…well seen its a saturday night.
I would have clicked a like button for that.
On a similar note I remember driving a very high mileage 1635 Mercedes and the gearbox had semi-failed. I dropped the trailer and was told to bounce back with the unit about 200 km from Slane (Ireland) to the main dealer. I had seen before that a roll pin used to wear or break in the boxes. Anyhow, I was left with 2nd and 7th gears. Push forward and it would automatically jump from 2nd to 7th. I drove to Dublin and, twice (luckily nearly stopped) it would drop by itself from 7th to 2nd. I made it back safely but the thought entered my mind, what if it dropped 7th to 2nd when I was doing 50 mph in a tractor unit? Not good.
I did hear subsequently that some of the 1748 units had blown out boxes and rear axles but don’t know the truth of that. All told the EPS boxes were much maligned in the press but as I driver I found them usually good. The V8 Mercs were a durable truck.
peterm:
dieseldog999:
thats a …woooshhhhh!!!.. for about 9 out of 10 replies…
troll feeding at its best…well seen its a saturday night.I would have clicked a like button for that.
The likelyhood of two counter rotating straight cut gears going into mesh at the speeds being mentioned are between not a chance in hell to absolutely impossible.
I am not saying such penisollogy wont cause a massive malfunction, but connect the transmission. It totally will not. Ever.
This is right up there with chalk around the wheels at your friendly RDC.
dieseldog999:
thats a …woooshhhhh!!!.. for about 9 out of 10 replies…
troll feeding at its best…well seen its a saturday night.
Right let’s consider that point DD. …(he said with his serious head on )
Yeh, we all know this guy just posts for effect and reaction most of the time in the same vein as that Rowley guy.
If he gets a page full of abuse, name calling, troll accusation and all the rest of it, then he gets the desired effect of as you say… ‘troll feeding’.
On the other hand if his post creates a genuine conversation piece, (ie his post is actually taken serious,) in the spirit of a forum of discussion, well could that not be construed as it ‘backfiring’ on him?..discuss. 
(Told you before DD, I’m an amateur psychologist in my spare time. 
serious head off. )
robroy:
dieseldog999:
thats a …woooshhhhh!!!.. for about 9 out of 10 replies…
troll feeding at its best…well seen its a saturday night.Right let’s consider that point DD. …(he said with his serious head on
Yeh, we all know this guy just posts for effect and reaction most of the time in the same vein as that Rowley guy.
If he gets a page full of abuse, name calling, troll accusation and all the rest of it, then he gets the desired effect of as you say… ‘troll feeding’.On the other hand if his post creates a genuine conversation piece, (ie his post is actually taken serious,) in the spirit of a forum of discussion, well could that not be construed as it ‘backfiring’ on him?..discuss.
(Told you before DD, I’m an amateur psychologist in my spare time.
Oh you’ve done it now.
Each time we hear a poorly argued view, it should further inoculate us against accepting that view…
The Dunning Kruger effect in, well, effect.
^^^^^^^;^
Ahh, I see you’ve attended the same psychology academy as me then.eh?
Got to admit, I had to google the Dunning Kruger effect to see what it was, 
(as I was off the day they covered that with a ■■■■ bad hangover.)