A few Maxx Questions..
 

Hello all, I have a few questions regarding the Maxx Series..


1. Are the Tmaxx 2.5 and Emaxx transmissions interchangeable?
Would i be able to drop an E-maxx transmission into a Tmaxx

2. Is there a wheelbase difference between the Tmaxx 2.5 and the emaxx?

3. Are the transmissions the same length?

Im asking these because i just got offered a Tmaxx 2.5 roller for my raze...


heres what its looking like with stock gearing and the 3905 transmision

Differential Ratio: 2.8461538461538463
Transmission Ratio: 1.8333333333333335
Other Ratio: 1
Spur Tooth Count: 68
Pinion Tooth Count: 19
Total Voltage: 18.5
Motor KV: 2458
Tire Diameter (inches): 5.75
Tire Ballooning (inches): .6
Motor Current Draw: 80
Motor coil Ω: 0.0119
Spur/Pinion Ratio: 3.58 : 1
Total Ratio: 18.67476 : 1
Tire Circumference (inches): 21.83 inches (554.59 mm)
Total Motor Speed: 43132.98 RPM
Vehicle Speed: 47.76 mph (76.71 km/h)
Estimated Adjusted Speed: 45 mph (72 km/h) - 6% loss
Effective KV Value: 2331.51
KT constant: 0.55 oz-in/A
Motor Torque: 0.23 ft-lbs
Final Torque: 4.28 ft-lbs
Final Power: 1480 watts (2 HP)

1. yes
2. no
3. yes

After all is done you might be better off getting the cash and buy a 3905. Better diffs, better frame, better layout, longer wheelbase. Better all around

thanks!

and truck is coming with a full array of rpm goodies and and hardened steel gears..


Are maxx trucks any bit competitive??

bump..

Will revo gear or diff fit on maxx diffs or bulkheads?

Maxx trucks are competitive with other maxxes, but they will loose to revos for sure, not certain about salvages.

The revo diff and/or its internals will not work in a maxx, and viceversa.

meh, i was thinking of taking a Tmaxx rolling chassis and throw an 1/8th scale center diff on it, MM 5s and what ever motor..


I know i will need some bulks maybe Diff gears and some decent tires to compete...

Are they grey plastic bulk heads any good?


What causes the diff gears to fail? just weak parts or flexing between the two gears

The grey bulks are a smidge better than the older blacks - but won't be up to bl power. The stock 3.3 or 2.5 structure lets the diff cases twist apart or open slightly pulling the R&P out of mesh - get grinding and eventually either pinion rips teeth off ring gear, or pinion looses some teeth. The 2.5 has 4 small 2mm screws holding the diff cup to the ring - another weak point, don't know if 3.3 upgraded this or not. Neither are shimmed stock, so some are diffs work/last longer than others. The stock spyders are another weak point and a good nitro diff will eventually have a spyder failure.

Nitro solution is alum diff cases, alum diff brace, alum diff cup with 3mm screws and good shim job. BL power/torque - something like UE diffs and alum bilks or flm hybrids with ofna style diff gears. Nitro upgrades will last longer than stock, but will be a problem eventually. UE (and alum bulks) or hybrids will fix it pretty much for good. Then you'll need drive axles and center drives - fortunately the 3.3 stuff seems to do pretty well here.

ok, i was looking at Diff cases and bulks...

Ran into one little problem though...

With the stock diffs, and 62/9 center gearing its putting me at 52 mph....
think this setup would put too much stres on a 10l?

anyone?

They're the same on the 3.3.

so shimmed stock gears wont hold up?

They will not last long. If you plan to use shimmed stock gear, use them with an aluminum diff cup to prevent flex and enlarged the pinion gear holes to accept 3mm screws. I had used stock traxxas gears, aluminum diff cup (kippsters) and pinion bored out to accept 3mm screws, shimmed and they lasted a long time. I have never broken one. I had since sold it in favor of the 6 and 8 spyders.

hmm. what shimms would i use for the maxx diffs?

All the parts and instruction you need is in this link. It even have pictures showing you how it's done. Read it :intello:.

Traxxas diff shim mod

hmm great info!!!

just would use diff lube and graphite powder instead of all that heavy, sticky grease

or gorilla snawt.

hmmm:neutral:

but wont Snawt attract dirt?

bump

Inside the diffs you would use grease or gorillasnawt- it wont attract dirt as the diff is more or less sealed, and the grease is thick enough not to leak out. Outside of the diff graphite power would be better to lube joints etc.

thats what i was thinking... i was gonna fill the diffs with diff oil, i have some 10k in the center diff and some 10k left over will that be alright for the front?

Does anyone know what size and thread the wheel nuts on the T/E maxx are?

Link please :D

...traxxas' exploded veiws dont show wheel nuts

Hex Size: 8mm
Diameter: 4mm

any idea on the thread?

T/Emaxxes wheel nuts are M5.

ah ok.

So far i got on my wishlist

Pro-Line Maxx bow ties
Savage 6mm drive cups
9t Mod1 pinion
62t spur gear
wheel nuts
Tekno wing mount
8ight wing
supplies to shim diffs

Ugh, found out that the max im looking at is the T-maxx with the 2.5.. not the 2.5R model..

so thinking about just getting 3.3 shafts and such.

not going to be a very high powered setup just a 10l, 5s and the MM

Nothing wrong with that- the L can motors are still quite beasty, just not quite as much torque.

well all the turns at my track are banked steeply so i wont need too much acceleration..

just enuff to pwn everone whos competing with a nitro mt :D

Do the Diffs and cases from the 3905 fit the standard Maxx bulks?

Yes they will.

hmmm... 50 bux for two 3905 diffs

or i see these Flm hybrid diffs, bulkheads for 145.. is it worht it?

I don't have the FLM hybrids but I do have the VBS and GA bulks with 8 spyder gears. I think it's worth it. It all depends on how much you're willing to spend.

hmm, if you were building a race worthy truck what would you do?

if i was building a race Maxx you pretty much need buggy gears. You could strenghten the 3905 diffs, Alum cases $30 each gh hobby (look like poo) flm 3905 diff cups $50 each. Pretty much bought FLM hybrid bulks with buggy gears there.

hmm, its not gonna be THAT powerful of a setup, only a 10l on 5s.. do couldnt i just get some 3905 diffs and shim them?

Ive been driving 3905 diffs with a vtwin on 2x 3s for 6 months, never had a diff issue. Ive been driving a 1.5d in a 3905 maxx but only a few runs, nothings broken.

hmmmm seems perfect for me

it is worth the upgrade IMO to go with the FLM diff cases. Even if you have to wait abit longer for the maxx to be completed. even though it is not that powerful you will be surprised on what Brushless can do and eventually they might break and then you would have to upgrade then. Its more efficient to save up the money and get the good stuff then take a chance.

BTW i have the hybrids and love them. Plus they are like alu bulks and diff cases in one and make the chassis more rigid.