FLM Hybrids+1/8 diffs or UE 6 diffs w/aluminum bulks?
 

What will be better?

Which 1/8 diffs are you going to use with the FLM hybrid? How much are you willing to spend? What aluminum bulks are you going to use with the UE 6 diffs?

Answer those and I'll let you know.

With the FLM hybrids, probably the HotBodies c8178 spiral cut or the c8084-1 diffs.
With the UE 6 diffs, I was thinking Great Assembly or FLM or any other quality aluminum bulkheads.
I am willing to shell about $200-250.
Thanks George.

The hybrids were a paint to build and shim correctly, IIRC. Plus getting a diff out requires alot of disassembly. But the diffs should not need much attention, at least compatred to the stock maxx diffs.

so the UE are easier to assemble? How do these differ in quality/durability? That's all I'm really after.
Also, If going the UE route, how are the Hot Racing quick-diff-release bulks...that should cut down on disassembly.

The UE diffs are just regular Hyper 7/8/8.5 with UE's diff output shafts while the Hot Bodies are hardened diffs. I don't have any experience with FLM's hybrid bulks but I do have UE's VBS bulks GA bulks with UE's 8 and 6 spyder gears respectively. Setup is easier on the VBS compared to the GA bulks.

If I were you, I'd buy the UE diff outputs from UE and the Ofna or Hot bodies diff from ebay and the GA or FLM bulks. This will cost you less than $200.

UE's VBS:
http://i256.photobucket.com/albums/h...Picture068.jpg

GA bulks with captured hinge pins:
http://i256.photobucket.com/albums/h...Picture087.jpg

Ofna/UE 8 spyder diff:
http://i256.photobucket.com/albums/h...Picture094.jpg

okay thanks for the help George, again! Pics were nice!
Do the GA bulks have the diff cases machined in like the hybrids do? By looking at the pic you provided they don't. So when you say to go with the ofna or hot bodies diffs, UE output shafts, and the GA or FLM hybrids, did you mean just the FLM hybrids? Sorry if i'm confusing =)
Also, what size UE diff outputs?
And will this diff work with the Hybrid bulkhead:
http://cgi.ebay.com/NEW-OFNA-HYPER-S...item4ced394d3a

The GA bulks don't have the diff cases machined into them. You have to use alum diff cases like on the 3rd picture above. You can buy those from UE also for $70 apiece.

So for a GA/FLM setup, you'll need the following:
GA/FLM bulks
ALum diff cases
Diff and pinions from either Ofna or Hot bodies
UE output shafts

For a hybrid setup, you'll need the following:
FLM hybrid bulks
Diff and pinions from either Ofna or Hot bodies
UE output diffs

The ebay link you posted will work but the diff ratio is 43/11. The ofna hyper 7/8/8.5 have a ratio of 43/13. You can compensate your ratio by using an appropriate spur/pinion combo.

okay, so i could just buy the ebay item, sell the 11t pinion and buy a 13t pinion, then use with the Hybrids, or I could use the UE ultralight cases w/ GA or FLM bulks..
BTW what size output shafts are needed? 6mm?

So george,are u saying that UE 8 spiders are better than hot bodies? Would really like to hear feedback from you since you have tried both..

On UE's site the guy states that he tried to cause failure to both the 6 and 8 spider diffs. The guy managed to break the 8's but not the 6's, stating that the torq diffs are not meant to handle a powerful brushless system, and that the 6 gear diffs were able to hold up.:whistle:

I still have to break any of them (Hot Bodies 6 or Ofna 8 spiders). I had also good luck with the 6 spider diffs (Ofna and Kyosho). The Ofna's are cheaper compared to the Hot bodies ($20-25 against $60-64 respectively).

I'm currently running Ofna 8 spider diffs in my gorillamaxx on 5S/6S with the Castle Neu 2200Kv motor.

Hmm interesting..I read in UE forum that Monstermaxx (owner) managed to break the UE 6s not as 8s installed in his dually BL truck. But that was couple of years back. Do you have the link for this? I want to read what actually failed in the 8s..

http://www.unlimitedengineering.com/...re/13540B.html
hope this helps, middle of the page.

The torsens were the weak ones not the 6 or regular 8 spider diffs. Besides, the torsens are expensive (140 from Ofna).

my bad:oops:

This is old, but I wanted to give my $0.02...if you can't find or afford a UE VBS, the following are your best options in my opinion (in order of best first):

[1] GA 7075-T6 Bulkheads & Braces with UE/Ofna 8-Spider Diffs inside UE Ultralite Diff Cases.
[2] GA 6061-T6 Bulkheads & Braces with UE/Ofna 8-Spider Diffs inside UE Ultralite Diff Cases.

[3] GA 7075-T6 Bulkheads & Braces with UE/Ofna 6-Spider Diffs inside UE Ultralite Diff Cases.
[4] GA 6061-T6 Bulkheads & Braces with UE/Ofna 6-Spider Diffs inside UE Ultralite Diff Cases.

[5] ACNCM 6061-T6 Bulkheads & GA Braces with UE/Ofna 8-Spider Diffs inside UE Ultralite Diff Cases.
[6] ACNCM 6061-T6 Bulkheads & GA Braces with UE/Ofna 6-Spider Diffs inside UE Ultralite Diff Cases.

[7] FLM 6061-T6 Bulkheads & Braces with UE/Ofna 8-Spider Diffs inside UE Ultralite Diff Cases.
[8] FLM 6061-T6 Bulkheads & Braces with UE/Ofna 6-Spider Diffs inside UE Ultralite Diff Cases.

[9] Hardcore Racing 6061-T6 Bulkheads & Braces with UE/Ofna 8-Spider Diffs inside UE Ultralite Diff Cases.
[10] Hardcore Racing 6061-T6 Bulkheads & Braces with UE/Ofna 6-Spider Diffs inside UE Ultralite Diff Cases.

[11] Traxxas 6061-T6 Bulkheads & Braces with UE/Ofna 8-Spider Diffs inside UE Ultralite Diff Cases.
[12] Traxxas 6061-T6 Bulkheads & Braces with UE/Ofna 6-Spider Diffs inside UE Ultralite Diff Cases.

You can still buy the new complete UE 8-Spider/Ultralite and UE 6-Spider/Ultralite kits from the UE Store, but you will need to find the GA bulks on eBay. The 7075-T6 GA Bulkheads are the best bulks ever made, so spending a little time finding them is well worth it.

The FLM Hybrid system should fit in here high up IMHO fitted with UE gears.

Thanks Chad! I've been kinda looking at putting a brushless in my Tamiya Txt atm, I already have a 3.3 electric converted Revo, so I figure that's pretty close to having an Emaxx, no?

Looks like good info but I'm a bit confused.

I need a stronger diff case or bulk head combo one piece.

Currently using LST gears in Losi aftershock alum cases with modded Emaxx 3906 grey bulkheads

The Losi ring gear is .38mm or .3inch larger than the FLM hybrid bulk but it's a 1/8 gear set, so I'm confused why they say 1/8 fits when clearly it does not.

If I want a Aluminum Hybrid bulks then what gear sets do I have to choose from ? I want speed not more torque.

I have a custom made AWD 6s 1/5 on road Rev-Osi revo & losi drivetrain.
If I need to ditch the revo and losi diffs and axle shafts I am fine with that, so what do I need to go stronger ?

it looks like ofna or hot body gears in FLM bulks, is that correct ?

thank you

What is GA????

Thanks

Great Assembly

Back from the dead :D

I was set on FLM hybrids with 1/8 gear... but after some reading (including this thread) I'm thinking differently.

I didn't even think about how much more disassembly it would take to do things using the hybrid/combo bulks... anytime you need to pull the bulks off the diff has to come apart. I'm not really sure how big of a disadvantage this is...

Why would you need to separate the bulks though, you can just remove them as a whole unit- not like you cant remove the chassis, braces, towers, a-arms or driveshafts without splitting the bulks after all..

True!

I'm just trying to weigh the pro's and con's of hybrid vs standard bulks. I want to get something going very soon.

I've already picked up the output shafts (5454) so I'm leaning towards the hybrids lol.

Just need to figure out what internal parts (gears) I need to get.

Looks like I have some options here.

Hoping that someone who has done FLM hybrids + 1/8 diffs will chime in.

I'm trying to see what I can find on ebay/online. I'd like to buy 2 diffs and shims for the FLM hybrids. I see that the gear ratio will be a bit difference so I'll have to change my gearing... no big deal.

Can someone please help me buy exactly what I need? Often I buy a lot of different parts and figure out what works on my own... It gets expensive though :(

Piece of cake- you have a few options:

hotbodies lightning buggy diffs ( hard to find complete )
ofna buggy diffs
LST2 diff internals ( cheapest route )

You'll need the 43/13 ratio diffs whichever ones you choose, since the 43/10 option drops the ratio too much, resulting in you having to gear up ( spur/ pinion ) alot in order to make any kind of speed.

There are a few good threads to reference for parts / installation instructions:

http://www.rc-monster.com/forum/showthread.php?t=8012
http://www.beatyourtruck.com/forum/s...Best-1-8-diffs

UE diffs & FLM hybrids use exactly the same parts & same method of installation, so its all gravy :smile:

I have ofna shocks... so I've been looking at Ofna stuff.

The problem is finding the proper ratio. Most of the diff's i'm finding either don't have the gear tooth #'s listed or they are 46+.

These look nice but it might be cheaper/easier to go with UE.

http://c0456141.cdn.cloudfiles.racks...n/ofn19343.jpg

No idea on the gear it comes with or if you can buy others... have to look into that. These actually look nicer than the UE's but I'm not sure which is better.

Whats the point of upgrading diffs if they don't break?

:lol: I haven't even managed to break a stock set of diff's (I have some cheap aluminum bulks now) but I know as soon as I start running 6s things are going to break.

Even now... the real weak point of my E-Maxx is the chassis! I hit a telephone pole at <15mph and broke a chassis in half D:

OK I found all the hotbodies stuff that I would need. Check out this post: http://www.beatyourtruck.com/forum/s...l=1#post824097

Copied:
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UE do, but all they use are Ofna Hyper diffs basically- look on ebay etc for some 'ofna differentials'. Hotbodies are getting hard to find these days for some strange reason, but they are just as good. Just add in the needed bearings & some 8x10x0.2mm shims...

However, because Im sofaking awesome, I found all the Hotbodies parts on Amain:

http://www.amainhobbies.com/product_...htning-Stadium x2

http://www.amainhobbies.com/product_...g-Buggy-Series x2

http://www.amainhobbies.com/product_...g-Buggy-Series x2

http://www.amainhobbies.com/product_...02mm-Washer-10 x1

http://www.amainhobbies.com/product_...el-bearings-10

You'll also need 4 of these:

http://www.rc-monster.com/proddetail...d=RCMdiffshaft

If you want to use the stock driveshafts or the traxxas cvds & drive cups ( or you can make your own by cutting the threaded part off of these: traxxas stub axles ).

You'll also need these driveshaft coupler with 8mm bore ( v2 ) if you want to use the stock center driveshafts, or pickup a couple 8mm drive cups such as these with an 8mm bore.


============================

The only part I don't see is the 8mm bore v2 driveshaft coupler. I am running Traxxas Opti-drive cvd's/driveshafts so I will need to get some 8mm drive cups for the center shafts.

I'm going to do the rear diff first and document everything so maybe it will be helpful to someone else.

UE uses ofna spider diffs in their TVS & Ultralite kits- you wont get much better than that really, but regular ofna buggy diffs or the HB lightning buggy diffs are near-as-dammit bullet proof regardless..

Can I use TRX CVDs with UE 6 spider diffs?

Maybe, but the output cups on the diffs are a little shallow, so the cvds may popout if you dont screw the pillow balls in. Most guys tend to change the output shafts/ cups to something longer/ deeper, or use the rc-m output shafts to fit deeper traxxas drive cups. Mike is out of shafts at the moment, but you can make your own using traxxas part #5454 & cut off the threaded part.

You could go with Revo drive cups. They fit and are just a little bit deeper.

Sparky

http://www3.towerhobbies.com/cgi-bin...?&I=LXTPP0&P=7

Oh, you mean those for extended rear wheel base arms?

Yup, those be the ones.