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Outdrive problem (1/8th scale diffs)

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2

.21Rc10GT

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Hey guys,

I have been having this problem with my 1/8th diffs. They arent going to fit into my fastlane bulkless because the outdrive cups are too wide. They are almost the size of the outer bearing race, and the hole in the bulkless is too small... If i drilled it out, there would not be enough material there to hold the bearings in place so i need to find a new outdrive. I have looked on towerhobbies, but havent really found anything. I believe these are ofna-based diffs. They are the 8-spider UE diffs. The outdrives go into the diff and lock in there with a pin, so there is no way to install it differently (it has to be installed assembled). The drive cup is moulded into the outdrive shaft, so i can't take it off and assemble it like a normal t-maxx diff... Anyone know of an outdrive shaft/cup that would fit? I can get measurements if you need them... I have also emailed UE and Fastlane about the problem and have yet to get a response.

Thanks for the help.

Well, i sat down and thought about it, thinking of solutions and i think i may have the answer. I can drill a hole in one side (with my drill press) and make it so i can access the screws from the outside. That should work perfectly. I will fill the hole with silicone or a screw or something, and it should work perfectly. I will let you guys know how it goes.
 
isn't there agroove in the bulkhead so you can line up the pin for the shaaft and still have room for a hex tool to tighten it???
I think that's what you were talking about but not sure...
 
Plaidfish said:
isn't there agroove in the bulkhead so you can line up the pin for the shaaft and still have room for a hex tool to tighten it???
I think that's what you were talking about but not sure...
Click to expand...

Sorry, i kinda talk in circles so you have to find the right part of the loop... lol

No, outdrives are moulded onto the cups of the unit. There is no external parts that you can reach when the diff is screwed together. The outdrive shaft connects inside the diff housing, with a pin that goes into the spider gear. So, you have to take it all apart to get the outdrive shafts out. I think my idea will work though... I will try it out tomorrow.
 
OH and when you press the two sides together you align the screws on the ring gear to the other side w/ the cup....and then screw it together via the hole.........HOLY CRAP THAT'S GONNA BE A BEOTCH!!!!!!.....
 
Plaidfish said:
OH and when you press the two sides together you align the screws on the ring gear to the other side w/ the cup....and then screw it together via the hole.........HOLY CRAP THAT'S GONNA BE A BEOTCH!!!!!!.....
Click to expand...

Yeah, but hell, if it works, I'm happy. Fortunatly, they shouldnt require much maintanence at all. They are o-ring sealed, so i can run oil in them, and they have way bigger bearings and stronger gears than the stock setup. I have the lash on the spiders set perfectly... just need to get the pinion mesh setup before its all sealed and stuff. Hell, i think it'll work fine, but breaking it down for working on will be a hell of a chore, maybe. :shrug:
 
Well, i got one side together... Feels slightly tight, but it will break in and be perfect! It took about 15 minutes... doesn't look too bad either... i filled the hole with some silicone and its on the cybermaxx chassis now... I think i'll do the front tomorrow...
 
Well, i got both front and rear put together... I think its gonna work awesome!!! I ordered the custom driveshafts for the center and have to order the titanium pillow balls... I also need an 18 tooth clutch bell because the bigger diffs make the truck higher geared...
 

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