Question
 

What would make a better truck for crawling?

The gear mod or the motor and gear upgrade?

Im gong to do one or the other.I will do the articulation mod but ZZMT are getting scarce and I dont want to mess up the oneI have quite yet.

what do you mean by "the motor and gear upgrade"? Do you mean the Yellow/Orange/Red gears/motors upgrade kit from RadioShack?

If so, they're to make your MT go FASTER (less torque). Which is the exact OPPOSITE of what you want for a crawler.

The 4th (5th or even 6th) gear mod is the way to go for a Crawler.

If i want a hill climber, I should do the gear mod and not get the motor upgrade?( The Radioshack motor upgrade)

Would the wheel upgrade make any difference also?

That's the jist of it. No.
Browse the forum and read all of the MT crawler threads. This will give you an idea of what the dealeo is.

I have though, found the red motor to have more torque than the green. It will be a little faster, but that can be taken care of when you gear it down.

I did the forth gear mod and it is unbelievable.Next is the articulation. Thanks for the help!