3905 differential question and aftermarket help...

[DwightSchrute]

i'm about done with my 3rd differential on my g-maxx. it's a 3905 diff, and i keep stripping it. i went to a spool, but broke that too.

is their any aftermarket/buggy diff that i can use in the stock case?


or what do you recommend for an aftermarket diff? and what diff case do i need?

everything else on the truck has been rock solid, but this diff issue is quickly becoming a pain in my ass.

any help is greatly appreciated.

[nitrostarter]

I don't think any buggy diffs will fit the stock Maxx cases.

Cheapest route would be to install some LST diffs.

Nicest route would be RC-M V3 diffs.

[suicideneil]

The RCM diffs are for the revo

You have 2 options:

UE ultralites or VBS
Modified LST2/ muggy diffs

Option 1 is $$$ but will last forever, option 2 is $ but does require a little bit of work- but only a little & will also last forever ( use the metal diff cases and metal collar.. ). Here is an excellent guide:

http://www.rc-monster.com/forum/show...t=9153&page=15

[DwightSchrute]

thanks, much appreciated

[E-Revonut]

Flm does make hybrid bulkheads to run 1/8 diffs in a maxx. They are available right here in the RC-M store

[suicideneil]

Ah yes, I forgot about option 3...

[DwightSchrute]

if i went with the flm bulkheads, which buggy diffs (also/ring and pinion?) would be a good choice?

[suicideneil]

The hotbodies buggy diffs are great ( I have them in my UE ultralite cases ), if a little pricey- Mike sells a kit in the rcm store that includes the pinion and bearings required too. Otherwise, anything ofna makes for 1/8 buggies is fine and cheaper too most likely- 43/13 being standard buggy diffs ideal for the maxx in 2nd gear. If you went with a center diff however, the 43/10 truggy diffs might be a better choice- you can always play with BrianG's calc and see what works best for you.

[DwightSchrute]

thanks. i think i'm gonna go with the flm hybrids and the hotbodies diffs. it's a little pricey, but the traxxas gears aren't cutting it anymore and i think the buggy diffs will be alot more economical in the end. much appreciated.

[simplechamp]

Do the HB hardened steel diffs have just the hardened steel outer ring gear, or do they come with the hardened steel internals too? I'm trying out some of those hardened steel internals in my Slipperential once they arrive, should be able to take a solid beating compared to the cast alloy ones.

[suicideneil]

Good question- I have no idea Never ever seen any broken internals though, just one mangled cup and a loose bit of metal shim- tough diffs...

Bear in mind though that the slipperential uses a slightly smaller than normal set of internal bevel gears- like the crt .5 has or something of that nature, just incase you werent aware or were planning on using normal sized 1/8 internals ( unless Im trippin again ).

[George16]

Originally Posted by simplechamp

Do the HB hardened steel diffs have just the hardened steel outer ring gear, or do they come with the hardened steel internals too? I'm trying out some of those hardened steel internals in my Slipperential once they arrive, should be able to take a solid beating compared to the cast alloy ones.

The Hot Bodies diff come with hardened internals also. The Ofna Violator Pro buggies use hardened steel on both the ring gear and internals also.

[simplechamp]

Good to know. I hate rebuilding diffs!