brakes not working right-- in wrong spot

[i_am_who_i_is]

hi i have a problem with my emaxx brakes. they are beteen neutral and forward, so whenever i go forward and hit reverse to put on brakes, my car goes reverse. then when im in reverse, and put it in forward, the brakes go on.....any suggestions what is wrong?(i tried resetting my esc and i havent tested yet, would that solve it?)

[Goinbroke4RC]

Sounds like you need to reprogram your ESC. (I'm not sure what you meant by "resetting" your ESC).

But it definitely sounds like reprogramming your ESC, as per the instructions, will solve your problem.

[Tervuren]

You might also have your channel reversed for the trigger. Try resting it first, if thats not it, switch that channels switch on your controller, which will reverse it, thne reprogram the EVX again and see what happens.

[SoCal-EMaxx]

Have you had your diffs out, or did you buy the truck used? I ran into that when I swapped the diff directions, then tried to reverse the controller settings. Finally swapped the diffs back to solve it.

[i_am_who_i_is]

SoCal-EMaxx: the diffs might be the problem, because it stopped braking in the right spot when i had my car in a million pieces(installing new parts)


Goinbroke4RC: by resetting i meant reprograming, it might have fixed it, but my batterys have just had there last use and i can test and see.


Tervuren: thats a good idea, cause when i reprgrammed it, my throttle was switched too. ill try it out once i get batterys to run my car.

[Froo]

Double check the wires going to the motors and make sure they are not switched. Even though it would be kind of hard to make this mistake, but mistakes happen. Red to Red and Black to Black.

[mt_enthusiast]

Originally posted by i_am_who_i_is
SoCal-EMaxx: the diffs might be the problem, because it stopped braking in the right spot when i had my car in a million pieces(installing new parts)


Goinbroke4RC: by resetting i meant reprograming, it might have fixed it, but my batterys have just had there last use and i can test and see.


Tervuren: thats a good idea, cause when i reprgrammed it, my throttle was switched too. ill try it out once i get batterys to run my car.

I_am, you may want to make one change at a time and see what happens. Which parts were you installing? It might not apply.

[i_am_who_i_is]

i would try one at a time. i was putting in new skids, bulkheads, shocks towers, and a bunch f alluminum. i actully put in my brothers diffs, cause he had the alminum and i just took the whole front and back of the car and traded.

[i_am_who_i_is]

i drove my emaxx today, throttle was reversed and brakes were too. i would hit forward and it would go forward,. i would hit reverse and the brakes would come on, then the car would go forward.

PS: i tried reprogramming my esc and it didnt help.

[mt_enthusiast]

Might be beating a dead horse here, but I'll ask it again. Do you have the stock TQ-3 radio? If so, what positions are the servo reversing switches set to? Page 26 in the manual says to have channel one to the left with channels two and three to the right. If this is not the case, make sure your throttle trim is set to zero and reprogram with these settings.

You mentioned having the truck in many pieces as it was being upgraded with parts from your brothers truck. Was it an E or a T Maxx. The ring gear in the diffs are reversed between the two.

Did you disconnect the wiring between the ESC and the motors? If so, did you verify that the proper red from ESC goes to proper motor red etc like page 25 in the manual?

Did you change the ESC with the other parts as well? Does it still have the standard Tamiya plugs? If not, were the plugs reversed by mistake?

There is a logical reason to the behavior.

[kschauwe]

The problem is that you either have both motors reversed wired or both diffs/ring gears are flipped. All the re-program of the EVX and flipping of the transmitter rev switches in the world is not going to help.
The front ring gear is on the Driver (Left) side, the rear ring gear is on the passenger (right) side.
See the exploded views.

[i_am_who_i_is]

yes i have the stock radio and the setting are right/left/left (i thought thats what the owners maual said to do)but i will double check.

his is a t-maxx.

i just hooked red with red and black with black.

the ESC and plugs are all stock.

i just switched to 7-cells, when i reporgrammed my ESC with 6-cells, would this do any of it?


i dont know what you meen about the front being on the left and rear being on the right. basically, i took off my chassis and everything on it in one peice.

[mt_enthusiast]

6 or 7 cells during programming doesn't matter. You can't just drop the e-maxx chassis where the t was. The differential is the assembly that is held in place by the bulkheads. You need to flip the differential so the ring gear (squarer shaped side of the diff is on the opposite side from where it is). If you compare the front and rear assembly (part #s 4980 and 4981) between the e and t, you should be able to see they are opposite each other.

[kschauwe]

Originally posted by i_am_who_i_is

i dont know what you meen about the front being on the left and rear being on the right. basically, i took off my chassis and everything on it in one peice.

If you put T-maxx Diff's in your E-maxx, you have to flip both over because the T-Maxx's drive shafts rotate the opposite direction than the E-Maxx's.
Look at ring gear (part no. 4981) these exploded views: T-maxx & E-Maxx

[i_am_who_i_is]

so basically u r saying that i have to switch the diffs? aww man!

also: my chassis was in one peice, but the rest of the car was all apart. i remember when it worked and i had the parts switched. ill mess with the ESC some more tonight.

[i_am_who_i_is]

ok, i did what you said and switched the diffs. and guess what......
same problem!

anyone got any suggestions? do i need new diffs?

next time i switch diffs, im not gonna put it back together all the way before i test it.

[mt_enthusiast]

can you post a pic of the diff installed?

[SoCal-EMaxx]

It's not that a specific diff goes in the front or rear, it's which way the housing points...left of right...simply switching them won't solve it.

Take a look at the exploded views, if you flip the diff over, the gears turn the opposite way.

[kschauwe]

The front Driff has the tapered side, the side with the screw heads, (see below)

towards the passenger (right) side, the rear toward the driver (Left) side.

[i_am_who_i_is]

so basically i taake the ring off and move it?