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

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mooman007uk

mooman007uk

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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:confused:


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

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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 ......
 
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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.
 
Rammer said:
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 ??
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I always try to kill it, just the way i drive....thrash the bollocks off it:D


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.
 
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


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:eek: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! :eek:
 
as sloppy as a fisted midget!
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That's good humour:D


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:rolleyes: 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
 
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