The robinson racing with aluminum diff cups do pretty good. They will stand a 7xl on 18 cells for a little while. Loosen the slipper up and it last longer though. Just take your time and shim the spyder gears up.

hmmmm.....sounds interesting. I'm looking for a new transmission case, and I was just going to buy a new stock case to house the UltraMaxxed gears and Traxxas hop-up input shaft/gears. Let me know what you find out Mike!

is this the robinson racing one??
RR

Yeah, but you don't need them.. Stock is reliable as well..

That hopup upper shaft is from aluminum, i would not reccomend it with a high power BL setup..

Yep that the robinson. You better off to see if you can get it with the aluminum diff cup with the 3mm screws. Not sure what you can get a lhs. I order almost everything online. I am with serum on the upper shaft. If it is aluminum. I would not recommend it. Not with high power brushless. I tore the teeth right off the one I had. Mad a big mess to clean out of tranny. That sucked.

3993X: Input shaft/ drive gear assembly, lightweight (18/ 13-tooth top gear) (hard-anodized/Teflon®-coated 7075 T6 aluminum gears)

you guys don't recommend this with an MGM160/Feigao 7xl on 14 or 16 cells? I'm beginning to question if the single speed conversion would be a more reliable solution for my needs.

Yeah, don't get it.
I am building my maxx too with the single speed conversion..

is this considered thread-hijacking yet?

Serum, what gears do you plan on using? Is it safe to say using the appropriate UltraMaxxed gears in the single speed conversion will work wonderfully?

That teflon coated harden aluminum is what went out in mine. I don't recommend it. I can't speak about the single speed. I still running the stock upper gear with a two speed. I like the versatilality of it. I do different kinds of running. I can play in low and switch to high a let the tires swell up. Need to come out with some belts in rc tires to keep them in shape. I have not tried the serum factor with duct tape yet.

I used duct tape inside bowties. It seemed to work pretty good. I just wish I didn't hit that chain link fence to tear a small hole in one of the tire's sidewall.

Thanks for the warning on the hop-up. Since going to the GMaxx side of the force, I'll probably use the "upgraded" input shaft/gears (I already have it) when I can build another stock EMaxx from the left-over parts.

If you like me. It shouldn't take you long. I have enough to start a thrid maxx. Not sure how i keep getting so many parts. Is that a musky in your avator. My aluminum shaft survived my novak hv maxx. It couldn't stand the 7xl to long.

that is a muskie in my avatar.

I think I'm going to get rid of my HV-Maxx. I have to head to the post office tomorrow as the delivery person didn't try too hard Saturday to deliver my new BL system. My only experience with Novak has been the HV-Maxx, but so far, I'm calling it "just say NO-vak." It's just frustration I suppose.

IF you going to the 7xl. You will see a big difference. I am not downing novak. I ran my with out problems. My brother 2 weeks and it was shot. Brakes didn'twork and it didn't do no better than the titans. I did get one thing out novak I like there heat sink. It has big cooling fins for my motor. :lol

I think there is a site goes something like rc-monster something or another that probably has a cheaper heatsink than $280. ;)

Im using HVmaxx
can you guys give a list on what to get for bulletproof drivetrain
i alrdy have steel idlers from Mike
and rear MIP CVDs and getting centers and front soon