i wonder if hardcore 2.2 crawlers can use this sort of system in their rigs?....i know they already have dig-setups or dig-setup ready transmission but this may be another option....i guess we won't know until we see the exact specs on these things.....

Crawlers can't take advantage of lockable diffs in the front and rear, because they are going too slow.
Putting this sort of thing in the center would allow it to be used as part of a dig setup that would require some tweaking.

dude i've got arb air activated lockers front and rear on my truck with over 900ftlbs of torque,

its not a kids toy, maybe a child that would flip that switch while driving shouldnt have that toy

I think it all just depends on how strong they make these lockers. 4wd on pavement is not ideal on a real rig, yet we do it all the time with our 4 wheel drive MT's. I dont think locking at full speed will be an issue and I hope they design it knowing people are going to do it.

Sure, I had a 600+hp twin turbo SBC in a lifted truck on 35s and no problems from the Detroits, but we are talking scale here. Imagine if your truck accelerated as fast as some of these MTs do. If you scale the speeds, acceleration and weight up to 1:1 they would obliterate our real trucks. That said, could our real diffs and driveline handle that kind of torture? The simple and correct answer is no. I don't believe these drivelines(Summit) will handle any more power than they already have, meaning brushless is out of the question. And I will bet that that two speed isn't going to hold up even to the 775 motor. The gearing is just too low. Unless its a metal geared tranny, I think they will fail. This truck as a whole is a failure on Traxxas' part, but with some real crawler upgrades could become a worthy truck.

Tempted, how is this truck a failure on Traxxas' part? If they set out to build a comp crawler, then yes they failed. They didn't set out to build a comp crawler. They just wanted to make a version of the Revo that was more capable on a trail, and they appear to have succeeded in my opinion.

Also, where have you seen that this isn't a metal geared tranny? It appears to me to be the regular metal E-maxx/Revo tranny with the metal 2-speed option in it. While we won't know until they're tested, I am optimistic that these drivelines will hold up just fine.

I do agree though that even metal gears will likely not hold up to switching the gears or locking the diffs on full throttle.

I understand that you harbor a lot of bad feelings toward Traxxas, but please don't let that tint your glasses the wrong color toward their products until they're actually tested.

Tempted the e-maxx and e-revo have the same plastic geared tranny and many of us have gone on to install the 2 speed with a brushless with no issues? Why would the summit be any different?. I have the e-revo and I can tell you this I will get the summit b/c it does what the e-revo cant. Its for a different perpose. Also if you are going to try to slam the lockers in on this thing at high speeds you deserve it to be broken.

exactly:yipi:

I'd be surprised if they didn't use the optidrive to disable locking unless stationary...

The Revo and Maxx have plastic geared trannies..... Also, the Revo and Maxx don't have the ridiculous gearing this has. I'm not saying it is a bad thing, but it will put huge amounts of torque down which will stress the gears. And we(not everyone) break gears all the time in the Maxx trucks without this gear reduction. Think of all of our diff failures, and that is normally with tall gearing. This will more than double the torque to the ground which more than doubles the stress on the parts. As for Traxxas, I still enjoy some of their products. I feel the Summit and brushless Revos are fails. They gave us no, zero, zip more options than we already had. The Revo features a system that is easily purchased and that most already have. They just stick it on there and "introduce" an all new brushless Revo. There was no R&D, no development and no Traxxas badged large scale system. I love that they introduced the E-Revo and Slash/Slayer trucks. I love the brushless ready E-Maxx and Revo drivelines. The Summit is a slow, lumbering truck that won't handle and doesn't seem to be able to crawl. Everyone has their own opinions, mine is that this truck is a terrible idea. Kids who want lights and an exo-cage will buy it.

I not a kid(Heck I have 3 of my own) and dont care about the lights or body(thats not what attracted me). Its different. All my rc trucks have been for speed and handleing. I think that the summet will be something to just sit back and have a little slow speed fun with and I will have a spare parts for it from the e-revo if needed.

I had a brushless lst2 and in its low range it was really slow but didnt have the lockable diffs and it handled so well it was uneventful at slow speed. So it was only fun at 50mph. I think this will be a nice change.

The thing is Traxxas has always had a low speed, all-terrain truck. Its the E-Maxx. You can gear down in 1st gear and have all the low end torque you need. The Revo suspension isn't going to help this truck. This truck obviously isn't intended to handle well and that is where the Revo's suspension works best. The Revo isn't going to share anything but the suspension design, the trucks are completely different. The diffs, driveshafts, bulks, arms, turnbuckles and pretty much everything else are all different. I don't buy the "have spare parts from my Revo" argument that many are holding. We could always throw a spool in our Maxx trucks and have the same traction. And it would work just the same as the lockers in the Summit. Honestly, how much time is going to be spent on the road in the Summit? A dismal top speed of less than 20mph in stock trim is going to be flat out boring on the road. So if all your doing is off road, slow driving then a spooled out Maxx will work just as well, maybe better because of the taller second gear. The truck just doesn't make sense to me.

-I stand corrected on the tranny. It has steel components and plastic gears.
-All our diff failures? I've never had one on the new E-maxx or E-Revo with brushless systems and I'm pretty hard on them.
-No new options? A new low-gear tranny, remote-locking diffs, new 7" tires, and their 4-channel 2.4GHz transmitters are all brand spanking new.
-When I first had my E-maxx several years ago, I would often have to change the diffs out to go from spools to open diffs. It was an annoying and time consuming process. I used to dream about being able to do that on the fly. This vehicle is exactly what me and four of my brothers have been waiting for, assuming its durability lives up to the current Revo platform.

Its crawling ability, handling, and durability cannot possibly be known right now so it's not appropriate to have an opinion on them. You can guess that they might not work, but we will not know until they're tested.

Implying that only kids will buy them is ridiculous and potentially offensive. Many members on this forum are adults and will buy them and enjoy them.

Valid opinions are more than welcome here. Once the truck is out and tested, then you can tell everybody how horrible it is. But if it's better than you expected, I fully expect you to acknowledge that as well.

Currently, your negativity and pessimism about something not even out yet isn't helping anyone.

Your statements can be seen just as biased as mine. You are defending a truck harder than I am disagreeing with it. If you re-read my post, I said nothing new about the Revo. Obviously the handling ability, or lack there of, is going to be a downfall to a truck with such a high CG and large tires. An E-Maxx with spools, a 72/10 spur/pinion and the wide ratio option will essentially be this truck. If you do much research you will find that even the reinforced 3905 diffs often fail because of the plastic cup. I have personally had many fail on me. As for a 4 channel 2.4ghz Tx, where? I know there is a 2.4ghz 2 channel and a new TQ4. Even those look like old TQ radios of the past. While I have my opinion and you have yours, there is no need to point fingers and say I'm wrong when we don't know what right is. I was just pointing out why I think the truck will fail and why an E-Maxx can do the same thing for much less money.

So what happened with traxxas that has you so down on them? You make a lot of good points in your thread, but you do have a pretty negative view on a truck that no one has yet tested.