I have a many engines from the early 2000's that are TMCC that I run temorarily with a Postwar ZW and a Cab 1 in command mode, but a few take off when I ease into the throttle at top speed. My Lionel UP Dash 9's (18286) in particular do this. Any ideas? I did engine resets with the Aux1 code, but I cannot run them at low speeds.
Any Ideas?
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yep... a case of the broken magnet ring... its happened to me too. You have to replace the flywheel with a new one. Lionel has a kit for this... or you can purchase the entire motor, board, and flywheel with the magnet.
I tried super glue and it worked for about 3 seconds. 
Do you have an item number for this? I also have this issue with the Lionel NYC NW2 Switcher which is an AC motor #18959
That model doesn't have Odyssey cruise unless you're giving us the wrong number. I answered this in another thread. Clearly, the AC motored one doesn't have cruise.
How do you set the stall speed . I forget? Maybe that will do it.
Its 18286 UP Dash 9
What thread John?
ZWPOWER13 posted:What thread John?
You posted this in TMCC & Legacy.
As I said there, that model doesn't have cruise, so there is no magnet ring to shatter. This is more likely an electronic failure.
I also asked if this happens immediately upon applying power or when you crack the CAB1 throttle in command mode. Different failures, depending on which symptom.
Set the stall speed.... Set the stall speed... Take the cover off the bottom of the Cab-1 and press set... scroll down the speed and press set again. (I think, it's been awhile)
It's so easy to try, I just don't understand why you wouldn't give it a shot.
I suppose the problem could also be Antenna or base related...
I don't know what locomotive I looked up, it didn't have Odyssey. Obviously, that's your problem.
I recommend ordering the whole motor, getting the flywheel off without the proper puller is... difficult! 
That still doesn't explain the AC locomotive.
Yep that's the broken Odyssey sensor. You'll need to replace it. I don't see this as a separate part on Lionel website but there is this...
The separate Part is item # 6108080128 Odyssey 1 Fly Wheel Magnet ring
Think I will just order a new motor.
John, I am wondering if the mother board is bad in the AC motor switcher.
I just ordered a new motor for the Dash 9, thanks for everyones help!!
Well, we need to know exactly how the symptoms manifest themselves in the AC motored unit. It's probably not the motherboard as that is just a passive interconnect board. What is the Lionel item number for that engine? I'll try to look up the correct one this time.
John,
The AC motor switcher is Lionel's #18959 NYC NW-2 Switcher
Does it take off as soon as it gets power, or when you first move the throttle knob?
This one is old enough to have the single board solution. It's likely this LCRU2 has a problem, not much else there.
First stop would be to make SURE the antenna is properly connected. If it's not receiving TMCC signals, it'll take off at full speed.
As soon as I turn the throttle knob, it takes off quickly
Hold your hand over the engine and try turning the knob on the cab-1.... It's a little tricky to do but possible.
Did you try to set the stall speed?
If it's reacting to the CAB1 and not taking off until you move the throttle knob, I suspect the drivers on the LCRU2. They're fairly easy to replace, and they're common parts.
John, do you know where I can get the drivers?
They're pretty old and mostly obsolete, here's a US seller on eBay for ten of them.
Q4008L4 Q4008L 4 8A 400V Triac Thyristors Teccor (10), eBay: 381745987432
However, you might want to use the approved pin compatible replacement that's more readily available: STMicroelectronics BTA08-400BRG
It also could be something simple.. Seems you have more than this engine taking off
. Quote.I have a many engines from the early 2000's that are TMCC that I run temorarily with a Postwar ZW and a Cab 1 in command mode, but a few take off when I ease into the throttle at top speed.
I mentioned holding your hand over the engine and trying to set the stall speed but Maybe your command base is not working as it should.
Does the command base wall adaptor have 3 prongs and is it plugged into a 3 prong wall outlet?
It also could be an engine antennae problem.
The problem with the Dash 9 was the magnetic ring. As for the NYC Switcher, I tried all the resets and holding my hand over the engine. As soon as I turn the the throttle knob, it takes off fast. In conventional, it is fine.
The power for the base is 3 prong. And I have no other issues with anymore locos. The engine was mint in the box.
Drat... Those engines were pretty tough. Keep us posted.
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