Hi!
After having assembled the complete model once, I was not satisfied with the shifting mechanism (it kept cracking and getting stuck in certain gears), so I disassembled it and now trying to rebuild. Only today, I have rebuilt the entire gearbox from scratch 5 times, but I get the same problem every time: In certain gears, there is insane friction, and the gears are not turning properly, only skipping and cracking. I can still turn the wheels of course, but I have a feeling that this is not how a 400$ model should work if built properly.
https://imgur.com/a/2WIeaxO
Upon further experimentation, I came to the conclusion that the noises and friction originate from the part with the two tan and two small black gears extremely close together (lower right corner) as they seem to be literally rubbing against each other. Also, when I remove the axel engaging these gears, the entire mechanism is very fluid. Can someone please tell me what I'm doing wrong? I have tried to leave some space between the gears in question, but as soon as I build the housing for the gearbox and insert it into the chassis, everything snaps into place under the pressure.
Any help appreciated, this is driving me crazy