Well, I found my stutter and distance problems. My chassis was causing interference, so I got a receiver box. My truck went further, but still not quite right. Still had glitching. I replaced my ubec with a rx pack, now i can go all the way down (about 1 1/2 blocks) with no probs, maybe further! thanks guys. I hope you find the problem Steve, yours sounds a little different, I would check all connections as the guys said, i redid ALL of mine and my truck runs great now!

I just did a real short test run after direct soldering the esc leads to the motor. This might be the fix! Now I just need the stinking weather to break!

Steve

Good luck Steve. This is all the part that bites! Once you get it though, plug and run until you really break something! I just started runnin Nitro too, many adjustments, never just plug and run with those! Let me know what happens with your truck, i just tore mine all apart again to get ready for my carbon gorilla chasis to get here, next week forsure! At least I have it runnin so I can just throw it all together...

Alright guys -

Got to do a better test with the ESC direct soldered to the motor and there was an improvement.

On a smooth surface, I don't see any hesitation. If I go off into grass, there is still hesitation when I make any substantial stab at the throttle.

However, I did notice that reverse seems to move at a pretty good speed irregardless of the surface. Could it be that reverse has some type of program limitation on the 9920 (25% power, or 50% power) and this limits the strain I'm putting on the esc?

Next, I'm going to try and redo all of the battery connections. If that doesn't change anything then I know I'm probably down to a controller issue.

Any thoughts? Any recommendations on a better controller?

I thought the 9920 can go as fast back as forward? perhaps it's your transmitter that is the limmit?

Sounds like you hit the right way though.

You also said you had this with more than 1 battery-pack, right?

Mine started in reverse faster....so I just reprogrammed it, and whalla!

Trty adding a cap to the spektrum
 

Spektrum makes a capacitor that plugs into your aux port on the receiver. When the voltage drops when you gun it the spektrum receiver feels the dip in power and cuts.

Goooood point on the cap. I forgot about that! I might see if I can pick one up here shortly...

Actually, now that I think about it, since the receiver is running off of a dedicated rx pack I wouldn't think that would be the issue. Might try it just in case (its only 6 bucks).

Serum - it happens with all of the packs I normally run with my truck. Thats why I am going to redo the ESC side of the battery connections, hoping that I have a cold join or other issue.