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Arct1k
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Good News Bad News! - 09.20.2008, 05:29 PM
Well the modded MMM is holding up great on 6s As123 2p with a 1515 2.5DF...

Sadly the RCM hybrid diff's couldn't take the power and the output shaft sheared!
   
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magman
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09.20.2008, 06:11 PM
WOW!!! That is some serious power...just what we all like. Although we could do with out the broken parts, but that is the fun of our hobby!

1. MBX-6 T8 1900KV, RX8 ON 4S
2. MBX-5T 1520, MMM ON 5S
3. MBX-5 ONROAD CONVERSION 1515, MMM ON 5S
4. MRX-3 ON ROAD CONVERSION 1512, MMM ON 6S
5. TEN T 2650 T8, MMP ON 3S
   
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JThiessen
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09.20.2008, 10:33 PM
I gotta think that shaft was overhardened to shear like that - or it was damaged at some other time. The tires on these trucks cant provide enough friction to transfer the amount of torque to shear metal like that.

Losi 8T 1.0, Savage Flux - XL style, LST XXL, Muggy, 3.3 E-Revo Conversion and sitting outside 425hp, 831 Tq Dodge Ram Turbo Diesel. It SMOKES
   
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Semi Pro
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09.21.2008, 05:00 AM
wow

hopefully rcm will replace it

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......maybe they want to be more like novak
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I'm telling Patrick you said that!
   
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plettenbergs
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09.21.2008, 08:21 AM
i have sheered several trani input and output shafts but not diff shafts....i only use UE though!....they are the BEEF!....try them!
   
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George16
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09.21.2008, 08:48 AM
That's not surprising. Just look at the amount of missing metal due to the hole bored to the shaft. Ever wonder why buggy/truggy pinion shafts don't have a hole on them?

Matt, you sheared them for the same reason I stated above. The output shafts have holes bored into them for the setscrews which reduced the amount of metal needed for strength and durability. The shafts are hollow due to the hole instead of being solid like the buggy/truggy pinion shafts.

Castle Neu 1520 on 6S LiPo Powered Gmaxx (Nitro Killer)
Predator with OS .21TM
Supermaxx with Mach .26
Revo with OS .18TZ
Kyosho ST-RR Conversion
Ofna CR with Tekin ESC/Motor (2)
   
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JThiessen
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09.21.2008, 12:44 PM
In the photo, in the lower left side, there looks like there is a hole/dent in the material. That looks like its possible a bad spot in the material (could be a void/inclusion) that could have been the cause of the shear. Can you get a better picture of it? Do you have the mating portion? If you look at the material, it should all look like the upper right portion if the damage was 100% shear.

Losi 8T 1.0, Savage Flux - XL style, LST XXL, Muggy, 3.3 E-Revo Conversion and sitting outside 425hp, 831 Tq Dodge Ram Turbo Diesel. It SMOKES
   
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crazyjr
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09.21.2008, 03:17 PM
Quote:
Originally Posted by Arct1k View Post
Well the modded MMM is holding up great on 6s As123 2p with a 1515 2.5DF...

Sadly the RCM hybrid diff's couldn't take the power and the output shaft sheared!
I have sheared the pinion on a V1 RC-M diff conversion, but not the output

Work because i gotta, play because i wanna

People here hate Nitro, I love it. I start it, run it about 50 ft from me and it dies, I go after it. Perfect exercise
   
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Arct1k
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10.26.2008, 06:43 PM
Humbug! I've gone and done it again! Another one sheared!
   
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George16
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10.26.2008, 07:39 PM
Quote:
Originally Posted by Arct1k View Post
Humbug! I've gone and done it again! Another one sheared!
Just get the UE diff outputs and you'll be good to go .

Castle Neu 1520 on 6S LiPo Powered Gmaxx (Nitro Killer)
Predator with OS .21TM
Supermaxx with Mach .26
Revo with OS .18TZ
Kyosho ST-RR Conversion
Ofna CR with Tekin ESC/Motor (2)
   
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JThiessen
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10.26.2008, 07:40 PM
Was that with the new Nue?

Losi 8T 1.0, Savage Flux - XL style, LST XXL, Muggy, 3.3 E-Revo Conversion and sitting outside 425hp, 831 Tq Dodge Ram Turbo Diesel. It SMOKES
   
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lincpimp
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10.26.2008, 08:30 PM
Quote:
Originally Posted by Arct1k View Post
Humbug! I've gone and done it again! Another one sheared!
Any reason that you could not use different bearings and the std non-machined 8mm pinions? Will the v1 cases not allow for the correct size bearings? I only ask I have a set of v1s and wonder how they will handle the 1521 on 6s....
   
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Arct1k
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10.26.2008, 08:26 PM
That was with a Neu1515 2.5 DF - The blinking set screw is stripped on the pinion so I can't take the motor off to install the CC 1515!!!

I drilled out what I could and thought I run to the see if I could get it to slip - no dice yet!

Pointers would be appreciated to those UE outputs
   
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George16
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10.26.2008, 08:44 PM
UE diff outputs. They are out of stock though.
http://www.unlimitedengineering.com/...ore/85037.html

Or you can try truggy/buggy diff outputs such as these. Just cut the threaded portion off.
http://cgi.ebay.com/NEW-4-6-SAVAGE-X...1%7C240%3A1318

Castle Neu 1520 on 6S LiPo Powered Gmaxx (Nitro Killer)
Predator with OS .21TM
Supermaxx with Mach .26
Revo with OS .18TZ
Kyosho ST-RR Conversion
Ofna CR with Tekin ESC/Motor (2)
   
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david lamontagn
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10.26.2008, 08:59 PM
That's why i use stock slider, i prefered to snap a slider than an output diff shat
   
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