Need help with choice of 1/8 scale diff for E-maxx
 

Hi everyone!
Just recently joined the forum. Thanks Mike for your assistance and answers to many questions. I have been researching for "THE BEST" diffs for the FLM 1/8th hybrid diffs case for my two trucks. I understand there are many options , not sure what is the best. The trucks will have 2200 Castle motor and Orion VST2 Pro 690 4P 2100 kv motor (with Mamba Monster 'X" ESC and Team Orion Vortex R8 Pro X ESC's.) What would the best diffs to match the motor and esc outputs? Side note. I enjoy the build! That's were the fun is for me. Thanks for your assistance in advance.:smile:

Hot bodies did are nice since they are made of hardened steel.

Thanks George16! In my research I have seen many options and many people not too happy about their choices. Iwill check out Hot Bodies diffs.

Whereabouts in Michigan are you located? My folks live in Troy.

I live north of Troy in the country. Hey Geroge16, I am still researching the parts for the hybrid FLM diffs. Hot Bodies has a few 1/8 scale diffs. Is this part number the correct one: part# c8084 and Pinion c8030?

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Okay - the main reason I am asking these questions is based upon the forum's experience. The R C Monster forums have a great more amount of experience than I do. So, I am asking the experts for advice. The diffs at this time are the only challenge. The two trucks on the pics are being upgraded and the next truck will be my V-Maxx build.

Wontcha' help me?

I have run the Kyosho diff's, the Hot Bodies Diffs, and the OLD Hot Bodies diffs.

The Kyosho diffs that will fit are from the ST-R/ST-RR/ST-RR Evo/MP7.5/MP777 series of 1/8th scale vehicles. The choices are pretty standard, just make sure you get the right pinion based on the diffs. The teeth can be had in both helically cut, and straight cut. eBay is a great place to find these, but you are going to need the 8mm outputs on the pinions. For the Hot Bodies, the diffs from the D8T/D8/Ve8 are helical cut teeth. The best part about the Hot Bodies diffs is in the pinion. It is cut down to 5MM from the 8mm pinion bore so you can use pretty standard driveshafts. MIP makes 5mm/6mm bores and all of their crawler driveshafts are usable with their Maxx based shafts.

As for which one to buy, both will hold up very well. The older Hot Bodies stuff (Like form the old Lightning buggy and Lightning Stadium truggy) have weaker internal gears. I have not even seen these for sale in over 7 years now, so no real worries on it, but they are the only ones I've manage to mangle and break with relative ease.

KMN - thank you for your assistance. This info will be used. Thanks for taking time to provide part #'s/manufactures info. This will be very helpful to me!

Just ordered the FLM Hybrid Bulks and looking the 1/8 differentials for the build.

These are a great choice, and great price as well.

Kyosho ST-RR Hardened Differential:
http://www.ebay.com/itm/Kyosho-ST-RR...EAAOSwnipWU5zi

Here's the hardened pinions that go along with these specific diffs:
http://www.ebay.com/itm/Kyosho-1-8-I...EAAOSwZVhWRFzB

Using Mike's custom Revo shaft coupler from the store here, you can get them in 8mm bore and use Revo shafts as center driveshafts relatively easy.

Here's the D8T/Hot Bodies route.

http://www.ebay.com/itm/HPI-Hot-Bodi...QAAOSwT~9Whd2S

http://www.ebay.com/itm/HPI-Hot-Bodi...cAAOSwFqJWhd24

A little cheaper.

And... I almost forgot. The most important part of any of this:

Diff shims. http://www.ebay.com/itm/Kyosho-Infer...oAAOSwMHdXQ36J

Pinion shims: http://www.ebay.com/itm/Kyosho-96644...MAAOSwaB5XmhJd

I am currently running the Kyosho diffs in Unlimited Engineering Ultralite cases, so I can't speak for their proper shimming to fit in the Fastlane cases.

Thanks KMN! I was just on eBay looking at the Hot Bodies diff gears. I was also checking out the shim kits for these gears. Thanks again for your assistance.

I use Spider diff's in mine ..... great diffs

Tinuss, how are they working out for you?

Spider diff's are very good diff's ...
I use them in all my trucks

Tinus, who are the manufactures of these diffs? I am new at this, that's why I am asking. I did see this info on certain sites - though

we got a group buy off ebay a while back

u can not go wrong with them

Tinuss, what is the part number and manufacture's name that refers to these gears? Is there just one manufacture - Ofna?

Have another question. How are the 1/8 diffs gears going to affect a stock E-Maxx transmission? The transmission is from 3905, 3903 or 3908.

Well, I got my answer to the above question.

Just ordered diff gears kit for the V-Maxx build. Look forward to the build. Does anyone use Mugen or Team Associated diffs? I'm researching for two other diff gears kits now for the other trucks. Presently checking our Kyosho.

Mugen: http://www.ebay.com/itm/Mugen-1-8-MG...EAAOSw5VFWM-0Z

Team Associated: http://www.ebay.com/itm/AE-Team-Asso...cAAOSwnNBXTmz9

Okay, I've settled the issue regarding the various diff gears. But, I now have a question regarding the bearings for the pinion gears for the FLM 1/8 hybrid diff cases. What bearings do I use? Any suggestions would help my research. The reason I have these questions ; this is my first build from scratch. THANKS!

HPI dffs are in FLM diff case for the build and I am looking at Mugen and Team Associated for the other trucks. Learning more through research and applying knowledge to the build. Thanks everyone for your help. Some pics of progress so far:

http://i1342.photobucket.com/albums/...sc0kwag5a.jpeg

http://i1342.photobucket.com/albums/...sn1jzfos6.jpeg

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http://i1342.photobucket.com/albums/...se4lfq3gy.jpeg

http://i1342.photobucket.com/albums/...soclpkqv8.jpeg

http://i1342.photobucket.com/albums/...sraxtkfw7.jpeg

http://i1342.photobucket.com/albums/...s4spcbnqo.jpeg

Been lots of fun so far!

yeah building them is almost just as fun as driving them .... :)

I love the up close hi-def pics. It's looking great!

Thanks for the input Tinuss and -Paralyzed-! I'm looking forward to the remaining build.

http://i1342.photobucket.com/albums/...sd7ffzcdp.jpeg

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Still working on the V-MAXX build. I am reasearching for metal gears for the transmission which is the next step of this build. Also, I purchased two more diff kits for the number two truck upgrade. I am learning in the process of the build and upgrades to the two other E-Maxx's.:party:

Are you going with an Emaxx transmission? If so the newer trams are metal gears already.

Thanks Nitrostarter! And yes that was the direction I was going. Your info helps with the next step in the build.

Yep, newer Emaxx transmissions are far superior to the original Emaxx trans.

Other option I would consider is a center diff using the RC Monster mount if you're looking for more truggy action.

Nitrostarter, I am still deciding truggy or monster truck. Interesting that you ask that too, I will know soon.

either way , center diff is the way to go these days

I agree center diff is hip but I still like a transmission if going for monster truck look and feel.

Well, since I already have some steel drive-shafts for this build; Traxxas tranny with metal gears, will be the way I will go. For the upgrades for the other trucks I will look into center diffs as a option as well. Thanks gentlemen, your experience is helpful in this build and upgrades for the other E-Maxx trucks.

FYI Nitrostarter, I contacted Traxxas tech-support and they said there is only one metal shaft and one metal gear in those trannies. I'm still researching :eyes: for those metal gears in the brushless EMAXX transmission.

This is the only one i no off? cost a bit off $$$!
Also don"t no alot about the maker of them or how good they are????
http://www.ebay.com/itm/GorillaMaxx-...MAAOSwpzdWtCHu

WEB

WEB, Yep! I did see that on eBay. There's another one for sale as well. It seems no one is making metal gears any longer, for the E-MAXX 3905, 3903 or 3908 tranny. However, i am still looking.

u are looking for a set of Ultramaxx gears I guess....
they are pricey .... :)

Tinuss, the question is; are they the only manufacture? Yes - they are priced high.