Hybrid Bulks... Again
 

Hi guys.

First time post here, sorry for this thread I have looked at the other Hybrid Threads but I still have some questions. First of all let me admit I know nothing about diffs, fairly new to the hobby, so if these questions are stupid I apologise.

I have a E-Maxx 3905 with the FLM Chassis, MMM Combo running 4S. I have the hybrids on order but just realised that the 1/8 scale diffs are nearly all 43/10,11,13. At the moment with the stock emaxx diffs I'm running a 64 Spur 22 Pinion and I like the speed I'm getting, no heat problems or anything so that set-up works for me.

If I want that kind of speed with the 1/8 diffs I'd have to gear a lot lower and I dont want to, well not to the low extent I'd have to go. So what I'm wondering is are there any 1/8 diffs that has a gearing more like the stock emaxx or erevo gearing 37/13.

Another thing I read in other threads that not all 1/8 diffs fit the FLM Hybrid Bulk so which ones do?

Thanks guys.

Pretty much all 1/8 scale diffs are a lower gear ratio. I dont know of any that are the same as stock t-maxx. You need to gear higher if you want to retain the same speeds. Example bigger pinnion or smaller spur. What the big deal about changing those gears Its not the expensive or hard especially compared to buying and setting up a set of 1/8 scale hybrids. I am sure flm website can tell you all the differnt diffs that work with there hybrids.

Hey.

There no real big deal in changing the gears but I'd just prefer not to change it too much, like going from a 64 to a 50.

If you go to the buggy ratio diffs (43/13) you will have to go to a 26t pinion to retain the same overall gearing/speed that you have now.

Or go to a 62 spur and a 25t pinion. you need about 2.5:1 reduction on the primary (spur/pinion) gearset to get the same as what you have now with the traxxas diffs. Only thing I would consider is do you have enough clearance to fit that gear combo, will the motor adjust enough? You could also go down to the 58t jato spur and run a 23t pinion. Just divide the spur tooth count by 2.5 to get the pinion size you need.

I havn't actually looked to see if I have clearance for the 25t pinion, I reckon I do, got the traxxas single motor mount and using a 22t at the moment and I think there was plenty room.

Yeah I suppose 58/25 wouldn't be so bad, not like I'm going to have a choice lol.

Anyone know what the difference in the Hot Bodies Lightning and Lightning Pro is? I know the Pro is 43/10, whats the non Pro. I think the Ofna Hypers are 43/13 too.

thanks lincpimp

Non-pro diffs are 43/13 too- its best to use this version rather than the pro as the pros obviously lower your overall ratio by quite a fair bit, meaning you need a seriously small spur or huge pinion to get the correct overall ratio.

Its well worth picking up 2 or 3 pinions though to experiment with your ratios- 18, 20, 24 for example is a nice spread, and combined with several of the cheap spurs you can fine tune your ratios very... finely. :smile:

Sweet, thanks guys.

Here is my Baby so far....

http://homepage.eircom.net/~se7enie/Fin/fn01.jpg

http://homepage.eircom.net/~se7enie/Fin/fn02.jpg

http://homepage.eircom.net/~se7enie/Fin/fn03.jpg

I recognize that shell- Jconcepts Tango 3.3?

Can you measure the wheel base on it for me pretty please (center of front wheel well to center of rear wheel well). :smile:

That truck looks familer whats your name on the trx forum.

Yep its the JConcepts T-Maxx Tango. Its exactly 12 inches, I'd like it to be about 1/2 inch longer or so, I think it would look better and fit better.

Yeah I'm over on the Traxxas forum a good bit. Have always viewed this forum but this is my first post, I like the different sections. Over at Traxxas I'm "sevenie"

Cheers for that. I asked them when the emaxx 3905 came out if they had any plans for a slightly longer version of the tango (which would be ideal for my gorillamaxx), and they said they were working on one- that was years ago.... :cry:

I think the wheel base on my maxx is 14 inches, so it would need a lot of hacking to make the shell fit saddly- shame, as its a really beasty looking thing.

Yeah its a pity because it is very nice shell. I have the Jconcept wing on order so looking forward to seeing what it looks like with the shell.

Nice looking truck. Welcome to RC monster. I have the same username on all the forums I join except for traxxas. I'm supermaxx over there :lol::lol:.

Hi George16, thanks.

Yeah I know you as Supermaxx, you actually answered my question about the Hybrid Bulks over there, your using the Hyper diffs. I did look on ebay for them but couldn't really find any, well none that will ship to Ireland. Also I was seeing the Hyper 7/8 were all Pro and wasnt sure if they were different to the normal Hyper 7/8 and any of the Lightning I could find were all Pro aswell, so was not having the best of luck.

The hyper 7/8/8.5 diffs (pro or rtr) have all the same gearing, 43/13. I have a bunch of them which I used on all my trucks.

Oh, I thought the Pro was like the Hyper 9/ST pro and was 43/10 or something. Sweet, will take another look.
Thanks.

Great delivery by Addicted2rc, got these in the sale.

http://homepage.eircom.net/~se7enie/Bulkhead/bh01.jpg

http://homepage.eircom.net/~se7enie/Bulkhead/bh03.jpg

Black is the new bling :)

Well you know what they say "Once you go black........"

Little more help.

I ordered 2 x Hot Bodies diffs from place in the UK since RC Monster doesn't have them. 2 more things I need.

Does anyone have a link to the drive cups needed for the diffs (out of stock here) and I'm not entirely sure what I'm looking for. I know its a 1/8th scale cup but any I have seen have 4mm set screw, not sure thats make a difference.

Also, what oil and grease does anyone use in the Hybrid/HB Diffs, I like some speed runs aswell as bashing, any links would be great.

Thanks Guys.

Hot bodies drive cups are what I used, but finding them ( or any 8mm bore versions for that matter ) is somewhat tricky. I would hit up ebay to start with, search for 'hot bodies'... but specify in the toys & games section, otherwise... well, you can only imagine the results you will get. I'll have a look too when I get home- the work PC doesnt like alot of sites that use flash, and no way to update it withot being an Admin.

As for diff fluid- 7k front & 5k rear is a good starting point, or 5k front & 3k rear maybe if you prefer a bit more diff-action.

Thanks, I did have a look around for 8mm bore drive cup but nothing. Plenty of drive cups but when your not sure what is 8mm and whats not it is like sticking a pin in them and there no chance any place will put a description with the them :grrrrrr:

Diff fluid, might go for the 7/5k so.

I have some UE 8mm drive cups and a complete set of 6 spyder diffs that I can sell but I'm currently away on a deployment (US Navy).

Shaz-zam:

http://cgi.ebay.co.uk/Hot-Bodies-C80...d=p3286.c0.m14

You need two of these, and some 4mm set screws to secure them in place (about 4mm long for the setscrews is ideal if my memory serves me correctly, though you can always grind them down if they are a little bit long). Some blue threadloc will come in handy too..

Excellent, Thanks a million.
That place on ebay only had one, but once I knew what I needed I did a serch and got a seller that had some and some sets screws aswell. So think I'm good to go now, think I have everything. Just waiting on the postman.

Still waiting for shipment from the UK, damn, postal strike.

Quick question the below output shaft, anyone know where I can get a similar one as RCMonster want $26 to ship to Ireland.
http://www.rc-monster.com/proddetail...d=RCMdiffshaft

Thanks.

Use the outer part of a Revo stub axle with the threads cut off... Lot cheaper... Found out after makin the investment for the RCM shafts...

Oh wow, part #5454, great idea and they work?

Thanks for the info.

Got this idea from George16 (Lito)... Ask the Maxx guru, he will know for sure... I havent done it yet, but I have the parts on hand to convert another set of LST diffs to work in a Maxx...

Excellent. thanks

Yep same here george16 gave me the idea so I tried it, turned out very well :)

http://www.rc-monster.com/forum/show...?t=9153&page=6

^^^ scroll down, Emaxxqabec did a walk through on it. He did a killer job on the pics and info!

:oops:
Tanks, that's was your idea first:mdr:

Hi

Well I started to put together my FLM Hybrids Bulkheads today, but befroe I went at it I just checke dto make sure everything fitted together, it doens't.

I using the HB diffs, got my revo stubb axle that I'll be using as out half shaft as I'm using CVD's aswell, not changed the out put cup to the to stubs yet.

Any way here are pics of the hyrids and the problems.

http://homepage.eircom.net/~se7enie/hybrid/front.jpg
Front
http://homepage.eircom.net/~se7enie/hybrid/front 1.jpg
Front
http://homepage.eircom.net/~se7enie/hybrid/front 2.jpg
Front
As you can see in the inset, I have marked it red, its too thick the bearing will not go into it.

http://homepage.eircom.net/~se7enie/hybrid/rear.jpg
Rear
http://homepage.eircom.net/~se7enie/hybrid/rear 1.jpg
Rear
http://homepage.eircom.net/~se7enie/hybrid/rear 2.jpg
Rear
And here its like FLM never finished the job, marked in red, the opening it way too small.

Now I'm assuming that they all use the same bearing size and not different size bearings for different sides of the truck? Any idea how to fix this without having to send it back to FLM. I'm living in Ireland and it'll take forever, expecially at this time of year.

Apart from the problem shown they are fine the Diff fits into the other side of the hybrids. Well at least I think they are fine, not been able to close them up to tell if there are any other problems.

I'm asking around the forums, so any help would be great.
Thanks

So the holes for the bearings are different sizes on each side? That looks like you got the Combo bulks instead of the Hybrids- the combo bulks use 3906 or 3905 diffs; the 3905 diffs use a different size bearing on each side of the diff....

Oh Great!!! I'm totally lost now, if those SOB sent me Combos instead of Hybrids I'm not going to be happy :diablo: The god damn Fastlane website isn't any help either, they are using the same pics for both the combo and hybrid and the same description. Because they were Anodized they didn't come in the package, they were in bubble wrap and all the screws etc were in a ziplock bag.

OK so the Combos, dont use 1/8th scale diffs?? They use 3906 or 3905 diffs with the diff case?

Thanks Neil

Yep, Combo for stock diff, Hybrid for 1/8 diff.

Tell me about it- lack of upto date/ item specifc images has always been a pain in the r/c world, makes me have to 2nd guess everything I look at sometimes.

The last 2 pictures you posted especially make me think those are combos and not hybrids- the hole/ recess for the bearing to sit in should be exactly the same on each half - Im gonna assume when you tried fitting the bearings that came with your 1/8 diffs, one side was fine, the other isnt even close (not just a tight fit which is normal, but a good 1mm or more too big to fit)?

If thats the case, FLM should sort you out, but getting hold of them is a pain quite often. Just keep the emails civil to avoid them blanking you.. :lol:

Thanks for the info.
And yes your right, one side is fine the other is way off.

Last night I managed to find the invoice that came with them, it doesn't say if its a Combo or Hybrid but it does have a product Number FLM10200 & 10300. Nothing on the FLM website about them, I did find an link from there old site mentioning the number, but of course the link is dead. Only other place I can find anything about these numbers are from Stormer Hobbies, https://www.ssl-stormerhobbies.com/c...ns&pn=FLM10200 It says Hybrid, but I'm not too sure, doesn't give any details.

Have sent a nice email to FLM, including the pics, so hopefully they get back to me.

Actually just found them at RC Bros aswell?
http://www.rcbros.com/cart/scripts/p...?idproduct=231

The plot thickens..

Normally, the worst you expect to find with FLM parts is that the recesses for bearings arent quite deep enough, causing binding issues with things like the 3906 tranny case and hybrid bulks; your issue looks like they packed the wrong parts rather than them being not finished correctly.

Fingers crossed for you :yes:

Yeah Maybe,
Have you come across the part numbers 10200 & 10300 though? If there are at least 2 places selling them as Hybrids there must be something to it? Suppose I'll wait and see if FLM get back to me, sickened I didn't check for fitting when I got them :grrrrrr: