moo's next weakest link is .....

[mooman007uk]

Just munched another set of 27/33 MCD gears....pants! . with the diff cups seemingly fixed now I have a+b gears going...2 sets so far and counting... using steel will only put strain in other places. bugger, bugger, bugger

 

[Sprint 77]

Looks like a heat fatigue then chewed failure to me. You making quite a few high speed runs when it went?


My aluminum gear cover with a 1" ducted hole in it will help cool them. I plan on trying it out at Diggers Dungeon.

 

[Rammer]

DANG , It looks like they melted ....!!!!!!! Are you running it hard , trying to


beat it up .... ??? That makes me want to try to fill , the gear cover ,with oil !! To try to prevent that ......???? I don't think grease will work anymore ??

 

[Sprint 77]

Air flow will keep them cool enough, oil would create a mess. Bearing safts have no seals.

 

[Rammer]

What about dirt and grass , that is going to get in the hole ????

 

[Sprint 77]

I am running a duct going up to my hood scoop that has a screen on it.

 

[Rammer]

How about some cut outs , with a dremel tool .Then plastic canvas , epoxiedto cover large holes ?????



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[Rammer]

I have had that happen to my SAVAGE , because gear mesh was to tight..


Set gear lash with some notebook paper , didn't happen again .....Also put metal main gear in ......

 

[Piranha2]

I noticed that when I installed my 27/33 combo they were real hot after a few minutes, went back to the stock set-up (25/35) and everything is fine.....for now.

 

[mooman007uk]

DANG , It looks like they melted ....!!!!!!! Are you running it hard , trying to
beat it up .... ??? That makes me want to try to fill , the gear cover ,with oil !! To try to prevent that ......???? I don't think grease will work anymore ??

I always try to kill it, just the way i drive....thrash the bollocks off it


Everything was working fine for 10mins then nailed it out a corner and rev city with no forward go. I got the 25/35 back on and will try that to see if i can munch those. There is no bind...my MT will freewheel on it's own down a slight incline.

 

[Lizardking]

Just machine two sprockets and put a chain on....never a problem again.

 

[mooman007uk]

just been out for a really good run, truck just soaking it up, running 25/35's, running in dusty clay kinda sandy stuff and it hits the pipe instantly ...great fun for 25mins and then ....bugger....chewed the a ad b again. But i think i've figured it out...gears weren't hot, they melt when it starts stripping...every time this has happened it's spinning around and when i nail it they go...what I think it might be is a rock/stone getting jammed in the back wheel and spinning the truck round, i nail it with a jammed wheel and it strips...it was definitely a rock today so i'm hoping that it was the other times too. i might just get steel mcd gears if becomes a regular thing

 

[DemonRC]

I've been getting the same thing testing different gearing. So far it seems I chew an A/B set the last 3 times I've run.

 

[Clubin]

moo, Too bad MCD steel gears can not be purchased seperately! I have a bunch of MCD steel gears and the numbers just don't add up. The only option would be to buy 2 sets of the http://www.innovativehobby.com/index.asp?PageAction=VIEWPROD&ProdID=2161 and use just the 30's.


Maybe if we ask ROB nice he will make a set? I vote 27/33.

 

[Piranha2]

27/33 sounds great to me Clubin

 

[cable97526]

Does anyone else see that it looks like horrid gear mesh? Hey Moo how much slop is in you A/B gears when new? it looks like quite a gap from the pics, even after you munch them there are bits of teeth still there like they only engage at about halfway which would be as sloppy as a fisted midget!

 

[mooman007uk]

as sloppy as a fisted midget!

That's good humour


The gears are a tight mesh, it looks to me like a tooth broke on A when i got a stone jammed in the rear wheel and then it just stripped down like a good un' when i punched the throttle, A stripped to the bottom of the broken tooth and just skimmed B. My drivetrainis meshed and shimmed to 99% of spot on. Since the diff cup weak link has been fixed now A and B are the weak link when you have a bit of extra engine horsies My next outing will be in sand with no stones so I'll see if i can still strip them.


I'm all over 27/33 and 29/31 steel gears...Rob says the factory is bringing some out soon

 

[DemonRC]

That's great news! Once those are on the market I'll be selling my backup Baja.