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Traxxas T-maxx wont move, no acceleration

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Not a problem, glad to help. If you have a camera post a video of what it's doing, or pictures of your spur gear/clutch bell, etc... That kind of stuff helps us get you back rolling quicker.
 
Ok, i'll try and get some pictures up of whats wrong, although will have to wait i as its a bit dark in the UK at the moment:D
all i hope for its that its is really simple like a bad mesh or something but if any one has any ideas of how to start and run the engine with no throttle trim that would be really helpful too! sorry for all this i am new to the tmaxx my other buggy is much easier;)
 
The easy part comes with time and patience, you'll get it mate, don't worry. :cheers:
 
Hi guys i have checked the axel nuts and they are all there and correctly alligned, i have check each of the wheels to make sure that the shape for the hex nut hadnt worn down, and it hasnt, i have also got some pictures of the spur gear and the clutch bell mesh on the truck. will try and get some video of the problem tommorrow if i can get the truck to stay running:)
Hope the pictures are OK if u need any more just ask and i will try to get them up as soon as possible
again thanks for the help, really appriciated
 

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Make sure the slipper clutch is tight. It probably is since the truck moved. They don't come loose very easy. Maybe the clutch went south? If you didn't mess with anything else on the truck when you swapped engines, it's most likely something to do with the new engine. Check the clutch
 
ok, where is the slipper clutch? is that just another name for the spur gear? i have put in a new clutch even though the original looked ok, but i can't try it because its too late in the UK but i will try it tommorrow, if there was a problem with the engine what could it be?
 
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I'm just thinking process of elimination. If ya didn't mess with other components, they're probably not the problem. The slipper is on the spur. It's the grey disk with a spring then a nut. Make sure thet nuts tight, then back it off 1/4 turn. Did you use your old clutch or did one come on the new engine? The clutch on the motor I mene
 
the clutch that i have put on as a replacement for the old one was a spare i had for the truck. Also should the nut be as tight as it will go before backing it off a 1/4 turn?
 
Just tighten it till it stops, then back off 1/4. I have a funny feeling about that spare clutch. Just a hunch. Or something may have let go in the tranny. That's someone elses bag, though. Not to keen on the tranny, yet.
 
It's on a spring, so don't crush it. Just close it completely, then back it off that 1/4 turn.
Something else to check real quick. Is it fully engaged in gear? If you have forward/reverse, make sure it is fully engaged.
 
The slipper for the spur and the clutch for the engine are two seperate things, you are aware of the difference correct? If you tighten the clutch bell too much it would also cause similar problems?!

Side note, what part of the UK? I work with a lot of people in Oxford.
 
In reply to marauder, i live in nottingham, the east midlands, i know that the clutch is in the clutch bell and that it works by centrifugal force which then enages the clutch bell which spins the spur gear to drive the trassmission(i think thats right) but i am not entirely sure on the slipper.
Also to rolex, how would i know if it was fully engagded in a gear? and if it wasn't how would i correct the problem? also it does roll forward when WOT has been applied for a few seconds but not at any speed if thats helps at all
 
Check the linkage that shifts it to make sure it goes full in and full out, and that it's not somewhere in between.

Again, on the slipper, it's the hex nut in the center of the spur gear. If you have the same problem after tightening it down, it's possible you've burned it out. When it's tightened, start it and see what it does. If you have the same problem, then something is wrong in your drive train. We'll trace it out for you, but setting the slipper first is a must.
 
it might be the forward primary gear in the transmission if it's not the slipper. I've gone through a ton of those(but i have a 3.3 in my maxx)
2na20ps.webp
thats the forward primary. its about $10 in the US.
 
Cheers Rccks i'll check that, how difficult is it to take the trasmission apart to check? does it take long?
Also Rolex i have tightened the hex nut so that the spur gear doesn't wobble is that about right?
Also whats the factory settings for the stock traxxas 2.5 engine? i think my tuning on the carb is way out, because it isnt running unless there is additional throttle on the trim.
 
You gotta tighten the slipper until it's tight, not just so it doesn't wobble. Try adjusting your idle screw before tuning the needles. If that don't work, you may be rich on the low-speed. I would try the idle first.
 
well i got the ilde turned all the way it and it still wont run without throttle from the trim, so i'll try leaning out the low speed needle
cheers
 
Good luck, bro. I don't mean to sound frustrated in my answers, just wish I could hop the big lake and help ya! Keep at it, lots of good help on rcnt. Remember to turn those needles 1/16 of a turn at a time. Let us know what she's doing.
 
ok i will, and yeh i appriciate the help, its just so frustrating to be off the road, although in the long run it will help with future problems, so thanks guys:D
 
Hi guys just thought i would give an update to let you know whats happened.
I have tightened up the spur gear as to how Rolex has said to, and i have put in a brand new clutch which i brought today so that i could rule out any problems there, remounted the engine ensuring a good mesh between the clutch bell and the spur gear and locktited all the engine mount screws, then fueled her up to give her a try but the O ring on the fuel tank has gone so i need to put a new O ring which i can do later but it will be to dark to try. These trucks just seem to be one problem after another:(
it isn't always going to be like this with it is it?
 
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