tmaxx conversion

[jimbo74]

ok, so i had a thread awhile ago about this, but am a little mroe serious now


i have an old, pro 15 tmaxx... it is not the wider suspension arms, i do have a rear spool, and also all 6 mip cvd shafts.....

i want to convert it to electric..... what would be the best way to do it? i assume i would use a motor liek the dewalt or something even larger?

i will worry about esc and motor choice later....

i want to keep forward and reverse, but i know things will be different with a speed control... what about the 2 speed tranny?

[Maxximum Overdive]

I seen this the other day thought it was genius. The beauty of this part is you use all of the existing driveline only replace the nitro motor/mount with this. Not sure if it will work with the .15 short chassis though.

http://www.ebay.com/itm/Traxxas-Tmax...#ht_1459wt_689

[Maxximum Overdive]

Only other part I think you would need is the 2.5/3.3 motor mount. They do sell a kit to adapt the 2.5/3.3 to the older chassis, but with this electric adapter only thing you would use is the motor mount. Good luck!

[kuskye25]

I seen this the other day thought it was genius. The beauty of this part is you use all of the existing driveline only replace the nitro motor/mount with this. Not sure if it will work with the .15 short chassis though.

http://www.ebay.com/itm/Traxxas-Tmax...#ht_1459wt_689

i saw someone on the mgt forum that used one of those for his mgt and got rid of it, said it robbed way to much power, he wound up making his own custom motor mount that made the pinion on the motor contact directly with the spur... im sure you could find a brushless motor mount that will work and just drill new holes in the chassis to make it sit proper...

[NitroTrout]

This conversion looks promising and I'm considering doing myself.
Includes a tranny mod and link for a motor mount.
http://www.how2rc.com/The%20T%20MAXX...c%20Power.html

BTW your motor and esc work as your reverse so you can gut all the TMaxx reverse components.

[wayke]

Guys you can do this without spending much money If you have tools and a Spare brushless system ("LOL") or some cash for a Brushless setup + LIPO

Motor mount from a Shelf took 15 mins todo complete had it bolted on ready to go went on so easy in the fuel tank space ("drill and a Hack saw" | "Dremel with Cutting disc") if you have an Old brushed 8t - 15t setup try that using spur 52T and 19T pinion Run it up and down and find your top speed if 2nd is not switching turn the shifting for sooner mines on the peak of 1st on a flat surface.

[jimbo74]

Guys you can do this without spending much money If you have tools and a Spare brushless system ("LOL") or some cash for a Brushless setup + LIPO

Motor mount from a Shelf took 15 mins todo complete had it bolted on ready to go went on so easy in the fuel tank space ("drill and a Hack saw" | "Dremel with Cutting disc") if you have an Old brushed 8t - 15t setup try that using spur 52T and 19T pinion Run it up and down and find your top speed if 2nd is not switching turn the shifting for sooner mines on the peak of 1st on a flat surface.

what? that jsut confused me like crazy

[jimbo74]

i liked that last setup from how2rc

however, i did notice they said this "that is why the new gears in the transmission are much wider/thicker than the old, to take the torque"

that has me a bit worried, as my old tmaxx probably doesnt have the new style gears.....


i know the tmaxx has had many transmissions and motors.... so would i be ok with ym old tranny? i would be doign to forward only conversion on it as well, i assume this will also make it jsut 1 speed?

[NitroTrout]

From what I gather this is a .15/2.5 transmission with steel gears replacing
the plastic gears.

dont think you need a FOC either just a single speed conversion.

Have you posted your questions to the E Maxx forum?
They gotta lot of knowledge when it comes to these conversions.

[Snook Man]

The parts listed in the How2RC mod are stock plastic gears.
If you’re going to be running a decent brushless/lipo setup, the single speed conversion gears (only available in plastic) will not last very long at all. You would need the FOC also.
Using a Emaxx BL transmission would be much better suited.

[NitroTrout]

i liked that last setup from how2rc

however, i did notice they said this "that is why the new gears in the transmission are much wider/thicker than the old, to take the torque"

that has me a bit worried, as my old tmaxx probably doesnt have the new style gears.....


i know the tmaxx has had many transmissions and motors.... so would i be ok with ym old tranny? i would be doign to forward only conversion on it as well, i assume this will also make it jsut 1 speed?

Ok. Makes a more sense with the quotes are combined.

"We strongly advise, rebuilding the transmission, with the Single Speed kit from Traxxas and the Forward Only kit from Traxxas, together they cost just over $20.00.
"This is really quite easy, just take out all the old gears and shafts, and replace them with the new parts, the gears are much wider/ stronger and can really take it."

"If you get hooked on doing wheelies like I did, you will need hardened steel, pinion and spur gears, (that is why the new gears in the transmission are much wider/thicker than the old, to take the torque)"

If youre on a budget and you want to go electric, this is a good alternative, IMHO.
You could use the E Maxx transmission but who's to say it fits without modifications?

[jimbo74]

i think i have ehard the emaxx tranny doesnt fit


i will definitely look into the 540 motor, or 550 as i htink they are the same size really.... and a minimum 100 amp esc with a 5000 or so 2 or 3s battery....

i was thinking, should i be running dual batteries? or will i not have the space for it?

i think i will be doing the high mount that how2rc offers.....

so... i need the forward only conversion and the single speed conversion? what are the part numbers for those? and what are we looking at costwise?

i think i can get a motor and esc online for under $100

[NitroTrout]

According to the site, a single LiPo 2s works with a 550 motor.
Looks like space is limited on the chassis, 2 batteries may not fit.

I PMed some part #s.
You should consider upgrading to some E Maxx diffs and upgrade the center drive shafts.
The old .15 running gear probably wont handle the added torque.

[jimbo74]

i saw the pms and sent you a couple replies.....

also how are the emaxx diffs different?

i have upgraded the driveshafts... i have all 6 mip cvd shafts

[jimbo74]

ok... so..... i already have the 72 tooth steel spur by rrp


now i need:

tra4994x
tra5193x

and

RRP8586

and should be good to go?


what is different with the e maxx diffs?

[NitroTrout]

Try the differentials you have, but there's a possibility the
two screw diffs will strip out eventually. They werent designed to handle the torque of
an electric motor.
The 3908 sealed diffs on the other hand are built beefier and will handle whatever you throw at them
Another bonus, with the diffs being sealed you can experiment with different diff oil weights,
adjustable to terrain conditions, unlike the old two screw difss which only used grease.

[wayke]

Thats my 3.3
2days ago


Now





My incoherent ramblings earlier were this.

[kuskye25]

ok... so..... i already have the 72 tooth steel spur by rrp


now i need:

tra4994x
tra5193x

and

RRP8586

and should be good to go?


what is different with the e maxx diffs?

here is a pic of my e-maxx diffs, they have a huge metal support in the middle the tmaxx ones dont, and they are sealed diffs, so you can fill emaxx diffs up with good diff oil also with a 4 screw case design, yours now are not sealed and only 2 screws holding them together,

i almost forgot to youll have to modifiy your center driveshafts to accomidate the emaxx diffs they need to be longer, i see you said you have mip cvd's you may have to find a longer cup or get 3.3 cvd center driveshafts... i ran into this issue as i made my 4910 into a 4909 3.3

[jimbo74]

anyone want to buy a tmaxx cheap? i would love to get it running... but this jsut seems almost impossible at this point.....

might just take it to hobbytown, and tell them to make it run.... they charge $40 an hour for labor..... but, someone who knows what they are doing, should have it running in seconds.....

[kuskye25]

anyone want to buy a tmaxx cheap? i would love to get it running... but this jsut seems almost impossible at this point.....

might just take it to hobbytown, and tell them to make it run.... they charge $40 an hour for labor..... but, someone who knows what they are doing, should have it running in seconds.....

yeah if i lived close to ya id come get it runnin for ya free... but if your willing to take time and learn nitro is pretty easy.... and extremely rewarding, its much more realistic then electric, most of the reason why i love it so much and have devoted almost 10 years to having one at all times...

as for buying it no im good i have way way to many rc's land and air.... post er up in the MP

[NitroTrout]

Jimbo, sorry your project didnt pan out, bruddah.
Nerver thought I'd live to see the day when I'd be converting one of my
beloved nitros to electric but I like your ideas and I'm gonna give it a go.
Since I'm simply converting and not purchasing an RC, I think the wife will approve.

God willing.

[jimbo74]

i mean i would like to do it... but it is realistically going to cost me $190 to get it all said and done.... i might still do it... we will see


i did have it running in late 2010.... so i don't know..... $40 to get it running again, is a lot cheaper than about $190 to make it electric with batteries

[jimbo74]

so if i was looking at gettign the emaxx diffs for it, will they drop into the housings for the tmaxx?

and how much $ am i looking at for the new cups for the center shafts? will i need to replace my center shafts?


i have the old, short chass, pro 15

[seabud1ne]

just wondering how the vxl system will push this truck , i have 2s and 3s batteries

[wayke]

Running 2s parallel works fine double the connetor on ESC as deans are 60amp rated thought about using 2 traxxas connectors but none spare this was stuff easy to get.

[kuskye25]

so if i was looking at gettign the emaxx diffs for it, will they drop into the housings for the tmaxx?

and how much $ am i looking at for the new cups for the center shafts? will i need to replace my center shafts?


i have the old, short chass, pro 15

yes the emaxx diff will fit the stock bulks.... they will make your center shafts strech more so if you get cvds for the centers get extended cups, my emaxx diffs i built brand new $90 for everything, ive seen people say thoguh they bought tmaxx 3.3 sealed diffs fully assembled new off ebay for $20 to $30 each and then jsut added the e-maxx internals like i have pictured above and come out to about $70 or so total... also i had to modify my axle shafts some on the yoke that connects with the diffs....

[wayke]

I've not had issue with my diffs any reason to change out for Emaxx on my BR-Tmaxx

[kuskye25]

I've not had issue with my diffs any reason to change out for Emaxx on my BR-Tmaxx

if your not having issues no you should be fine, and you may already have the 4 screw case and sealed inner diff cup, if so the only added thing to make yours emaxx spec is the diff carrier you see pictured above in mine... its the huge beefy slab of steel that supports the spider gears...

but jimbo said he had stock diffs from a pro.15 tmaxx so his would definitely need updated to hold BL power

[wayke]

Im lazy, I just looked up dif specs then etc its the REVO diff so no need to change anything i wal looking foward to taking something apart waiting for Work to startup again is a Pain nothing todo but post in Various forums and tinker with my cars waiting on some deans connectors to get some stuff i scavenged of people that said throw it away.