Will a Honda Odyssey Roll in Neutral?

Backfire into intake?

What would make it backfire, pushing in it neutral. Even now in neutral pushing or pulling the engine turns, it was up to 3000 rpm and engine was not running

I don't know what's happening in your case, but towing a vehicle with an automatic transmission with the drive wheels on the ground and the engine not running can damage the transmission, even with the gear in neutral.

Neutral gear disconnects the transmission from the engine but not the transmission from the drive wheels. If the engine is not running, the transmission can overheat.

https://auto.howstuffworks.com/auto-parts/towing/vehicle-towing/car/tow-two-wheel-drive-vehicle.htm

Looks like the plastic reached it's expiration date.....

What plastic, that's metal that was blown in half

Isn't the gear change electronic? Wait, you were pushing this vehicle with the engine at 3000 rpm? What are you trying to do? start push? Sounds desperate...

Driving down the road and transmission went out, would go in reverse but not drive. Drive was toast. Me and my mechanic went to get it to the shop about 4 miles from where it went down. I started the van and when he started pushing went about 15 feet, there was a loud explosion and smoke rolled out from under the hood. Opened the hood the plastic cover was in pieces and so was the intake. So started to push it in neutral again, the gauge went to 3000 rpm and not a easy roll either. So we got a trailer and got it to the shop, still have not took it a part yet.

Mechanical sympathy

the engine and transmission were together so long that when the drive died the engine couldn’t take the loss and decided to end it with a bang.

if you gave the engine a hug sooner the outcome could have been different.....

It sounds to me like when you pushed it, it was in reverse, even if the shift indicator said "neutral". I think the engine was turning backward, pumping gas fumes out the intake and a spark from the ignition caused the explosion. (Pushing a vehicle with automatic transmission, even in neutral, with the drive wheels on the ground is not a good idea.)

I wish you luck. Transmission problems don't usually come cheap. It may be more cost effective to find another vehicle.

Wouldn't the rpm gauge be reading ( - 3000 ) ?

Wouldn't the rpm gauge be reading ( - 3000 ) ?

I don't know exactly how it works, but I assume there is a sensor on the engine crankshaft that generates a pulse on every rotation and it probably doesn't care which direction the engine is turning. The tachometer is just a pulse frequency meter.

So to confirm, when this happened, the engine of the Odyssey was running, like at idle speed, but there was no torque from the engine making it to the wheels, for whatever reason. Losing all but reverse gear is not uncommon, clutches/bands not engaging for hydraulic or mechanical reasons.

There is no reason not to move a car with an automatic transmission with wheels on the ground, especially if you have the engine running. Flip your car into neutral at 70mph road speed, foot off the gas, not a problem. The transmission oil pump is always driven from the engine side, so your lubrication will be as good as it ever gets. If the engine is not running, then you do have road speed limitations, typically less than 30MPH. Transmission components driven by the tailshaft rotating without pressurized lube can accelerate wear.

Flat tow for most Ford Explorer 4WD auto is done all the time, engine off, check your tow bar suppliers for those guys with RVs, those are auto trans vehicles, drive shafts all connected, newer vehicles require battery disconnected to not mess up the transmission electronics.

The engine couldn't have been running for your second try, so not sure how your undoubtedly electronic tach could have seen 3000 rpm, perhaps an electrical upset from the unbelievable intake manifold situation, never seen anything like that in 50 years.

If the transmission did not actually go into neutral, then pushing the vehicle should have been unusual in some respect, excessive effort, engine sound odd? The intake manifold was obviously filled with just the right mixture fuel vapor, and even manifold heat or EGR valve heat could have ignited it, quite a mystery.

I don't believe that modern cars can be towed and turn the engine over, or push started. They lack the rear pump of old days that allowed the tail shaft to drive the gears connected to the engine flex plate splines.

Something must have welded the gears together inside this transmission.

Only a tear down will tell.

I doubt the transmission had anything but tangential involvement in blowing the intake manifold up, but the guts of a transverse drive transmission may be easier to lock up than the old RWD tranmissions I’ve messed with. They should have noticed something odd when pushing, and it is likely that it would be very reluctant to roll at all.

Wha?? All of a sudden we are told, the engine was running.
Why have the engine running on a car with a known engine/transmission problem?
Madness....that's why it went bang. It wanted to end it all.
Del

I can only guess that your transmission was NOT in neutral, though your selector may have been.

We towed and auto once trying to "drop start" it. Was OK and easy until we got up a little speed and then the towing vehicle REALY felt heavy drag. It did start, but that was back before all the modern electronics got involved.

One of the few cars that will roll in neutral is a ford f 150 4x4.

"One of the few cars that will roll in neutral is a ford f 150 4x4.."

Can you offer any evidence that this is remotely true?

Even if you intended to say "not roll" it is still nonsense.

Lyn, google: f150fourwheeldowntowing.

My friend uses a 2017 xlt . He does Drive Away.

You are very confused.

Your comments are nonsense.

Lyn, see post #19. / rwilliams. Maybe you ask him if he confused too.

NO! You are still confused. All vehicles will ROLL if in neutral, with no brakes applied!

Which is what you said. You DID NOT mention towing!

There's a lot of speculation here, and not much fact.