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Old 06-14-2014, 09:09 AM   #3091
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took an AE spur (9649), put it in my lathe and _lightly_ tightened it down, cut out the center (to cut plastic and composites you need a sharp bit with a lot of rake)....cut it so it slides on with just a hair of friction, if theres too much friction it will warp, making one side of the teeth higher than the other side

you can use a drill press too, and the tool shown a few posts back



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Old 06-14-2014, 09:10 AM   #3092
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What is making everyone's spur gear stripping?
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Old 06-14-2014, 10:33 AM   #3093
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that is indeed the question....rocks/dirt or something.

i checked my mesh every run, in hopes of not stripping a spur, and yet it happened

anyhow, i think i might be good to go, im hoping the screws dont need a nut on them, cause there no room for the nut, with the screws im using (aluminum)...but epoxy would be permanent so i would have to machine the spur off should it strip, and theres the risk of the epoxy gluing it the diff shut so it cant be opened at all...[EDIT]the more i think about the more i want to use epoxy, i will just put some oil on the diff housing so the expoxy cant adhere to it

i used the holes that was already in the AE spur...cross my fingers that it doesnt fail...im still debating if i should epoxy it on just to be sure



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Old 06-14-2014, 11:03 AM   #3094
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Well done on that AE spur conversion. I am doing it right now as well. I am religious with my mesh settings and don't know how mine stripped after only 8-10 packs. It was not due to dirt or sand so I am at a loss.

Quick TIP: Replace the button head motor mount screws with the large head screws. Those button heads can't take the torque when tightening them.
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Old 06-14-2014, 11:49 AM   #3095
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diff is in the car, it actually makes it easier to tighten the pinion as the now spur sits a little further back.

the screws i used needs to be cut to down in length or they will catch on the diff mount

i dont know if its because the spur stripped my pinion looks like this or if its because i has been grinded down by dirt/wear that the spur stripped...it had been run in a different car so maybe the wear pattern from the other car simply cause excessive wear

i decided on epoxy, if it strips again i will just machine the new spur off

but im ready for sunday race if i can get out of the house





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Old 06-14-2014, 12:02 PM   #3096
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Your pinion gear looks really worn out. Here is my center diff after I removed the lip of the old spur. Installing the ae spur gear in a few minutes.



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Old 06-14-2014, 12:07 PM   #3097
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Cygnus - I would say that your pinion is almost certainly the cause of your blown spur gear.

On another car I had a top shaft gear in the transmission get to looking like that, and it destroyed 2-3 idler gears in rapid succession before I figured out the cause.

If you continue to run that pinion I would rate it very likely that you will strip another spur soon...
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Old 06-14-2014, 12:14 PM   #3098
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[QUOTE=Red78;13335402]What is making everyone's

money sent
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Old 06-14-2014, 12:22 PM   #3099
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Quote:
Originally Posted by Rasheed View Post
Cygnus - I would say that your pinion is almost certainly the cause of your blown spur gear.

On another car I had a top shaft gear in the transmission get to looking like that, and it destroyed 2-3 idler gears in rapid succession before I figured out the cause.

If you continue to run that pinion I would rate it very likely that you will strip another spur soon...
that gear is done...swapped to a new one(aluminum)....might go steel pinion if it happens again
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Old 06-14-2014, 03:39 PM   #3100
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Quote:
Originally Posted by erevo1*16 View Post
So.... back to these spare parts...

Why would someone think it would be a good idea to tell us when they are coming, if there is a chance that they are wrong?

I sell cars for a living, and I'd like to share that:
1. Over Promise and UNDER deliver is a bad idea.
2. NEVER promise what you personally cannot control...

Anyway Tower is now saying "Late June" on everything... and AMain is saying 6/27/14.





PS...

I screwed up, and I may need some help.

I got my new spur gear, and when I went to remove the screw from the diff mount(bottom of the chassis, front brace.) I stripped the screw head. I tried to use a * t8 and that just rounded it more~

I then tried JB weld on the end of an "L" wrench... fail.

So I got my drill and very carefully drilled it OFF...

but now I'm left with a diff brace that has a tiny screw in it.

ANY way to get that out???


I know I think I am going to have to buy a new one....
But I'd like to save it if I can. Just wondering if there is a chance to re-tap it? (It is drilled out to the point of being concave now, so there is no purchase to be had on the screw to back it out....




Thanks
Jb weld should have done the trick...but its very important you let it cure fully...and that can take 24hr and the thing you glue to the screw has to be what offers most resistance

You can try a torx bit

With small set screws like on pinions etc its VERY important to have a really good tool like hudy...MIP...thorp...arrow etc...I made the switch to MIP and have since then only stripped a single screw

Screws easily got some grease or oil on them...make sure to degrease by flushing with motors pray before gluing

The damage is done and I would drill the screw out....rethread the hole one size up and get a screw to match....this is not something easily done by hand....a drill press would be ideal..I would use cutting oil while drilling and threading
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Old 06-14-2014, 03:48 PM   #3101
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The kit comes with oils doesn't it?
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Old 06-14-2014, 04:12 PM   #3102
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Yes, 10/100k diff oils and 500cst shock oil.
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Old 06-14-2014, 04:15 PM   #3103
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Thanks, I'll try those out first.
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Old 06-14-2014, 05:43 PM   #3104
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[QUOTE=jmoneym;13335632]
Quote:
Originally Posted by Red78 View Post
What is making everyone's

money sent
Money sent ?? Not to me.. I didn't sell you anything
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Old 06-14-2014, 06:07 PM   #3105
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Quote:
Originally Posted by Red78 View Post
have had this sitting for a bit..no time...Been working on my car in the garage.
So what are you trying to say? Up for sale? I'll take it.
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