If I mash open the throttle on my avalanche it wants to pull right pretty hard. It has done this since I bought it. I have replaced all the electronics and still the same issue. The truck will drive straight when I am just cruising but when I put some juice to it, it will pull right. What could be causing this?

its called torque steer, make sure one of the wheel nuts isnt too tight

Do you mean the nuts that hold on the wheel to the hub? If so, how do I know if it is too tight?

turn each wheel and see if they turn freely. alot of rc's do this, its called torque steer and can be caused by serveral things, sometimes putting thick grease in the diffs (small gears) can correct it too, makes the tires grab more evenly. sometimes the alignment of the tires can cause this too.

Well I have aligned the tires and adjusted the camber so they are all straight. What weight of grease do I put in the diffs and do you have any directions on how to change the oil out? Maybe some pics too...
Thanks.

its the small diff gears inside of the rear and front end. you will see the diff box when you take it apart. just take the screws off and put some thick grease inside of it and close it up. Dont overpack it.

mine does that to, but i noticed it is because the front wheels spin when i give it full throttle.

Its mostly due to diff fluids. Installing thicker fluid will correct it.

Is the diff filled with a fluid or a grease, you mention both??

the 1/10 use grease, the 1/8 use fluid

Thats what I figured, thanks for clearing that up. How often should the 1/10th scale diffs be rebuilt and re-greased??

it really depends on the running that you do, if your a hands on person and dont mind, i would say once a month, alot of racers do it after every race.

I don't mind working on these at all, actually enjoy it. Is it a big job to do?? Do the diffs come out in one section with the shock towers attached then disassembled? If you have any tips it would be appreciated.

PS: Thank you for taking the time to answer my questions. Once I learn these things inside and out I hope to provide support with ya.

you would have to remove the diff housing and take the diff appart, its a little bit of a job but if you dont run in a real dirly area all the time and only run a few times every month they you wont have to do it so often.