New DHK Zombie slipping gears

[RMA]

Hello,
I'm new to the page and quiet new to the hobby.
Got some experience with cars and medium experience with RC's at this point.

Received a DHK Zombie yesterday. Had more upgrades then what the listing said.
Now I noticed there's a little play between the pinion and the spur gear.
When I give it full power it slips one time, then goes.
When it's against a wall and you give it power, you hear that it's slipping and will not go (same as going over a steeper obstacle).

I'm at a loss with my limited knowledge and hope someone here might have some advice for me....

 

[tntpoof]

does it have a slipper clutch? if yes tighten the nut make it a 1/8 turn tighter.. if pinion and spur arent meshed correct then that also could be issue correct gear mesh I se the small piece of paper .loosen motor mount then slide gears closer . put piece of paper between gears 1st thats the way to keep gear mesh correct,

 

[tntpoof]

after looking at your model I see you will have to loosen the 4 screws holding the motor mount in place in order do a correct gear mesh.. Id also put 2 pieces of duct tape on underside of chassis so it protects screw heads..

 

[RMA]

after looking at your model I see you will have to loosen the 4 screws holding the motor mount in place in order do a correct gear mesh.. Id also put 2 pieces of duct tape on underside of chassis so it protects screw heads..

Thanks for the reply! I set the mesh and it's good. Does not have a slipper clutch as far as I'm aware.

Did notice I can turn the spur gear quite a lot before the wheels start moving. Can turn it about 50% either way before it grabs to go forward or backwards.

Thanks for the tip on protecting the screws on the bottom ?

 

[tntpoof]

sound like issue with main diff.. Id contact seller and ask for new main diff..should engage with 1 tooth movement at spur and and pinion..

 

[RMA]

Contacted the seller, they recognized the issue and are sending me a fully new center diff and motor pinion ??

 

[AxeRC]

Glad to hear this. Some sellers arent that cool about it.

 

[RMA]

Update!
Got a new, plastic, diff and pinion gear. Installed both, but same result unfortunately.
Added a video below to demonstrate the issue. Anyone got a clue? Getting to the point where I'm thinking about giving up....

 

[RMA]

 

[tntpoof]

how did you set backlash of pinion and spur? sound to me like gear mesh is way to tight... most use 1 piece of writing paper and push gears together and slowly turn a tire by hand then lock motor in place I think there's a few youtube videos on this

 

[AxeRC]

I use the paper method too. Always worked for any rig.