HairyEyeBall Posted March 3, 2011 Share Posted March 3, 2011 Hey guys, does anyone have any idea why the internals of the front diff on my brushless e-maxx would have been munched up?? All seemed fine a few days ago when I was running it over the park. I noticed one wheel was spinning on its own when I was giving it a clean up today so stripped it down and half the teeth had been chewed up inside the diff (the two parts in the middle of this pic) I wasnt running it overly hard, didnt crash and didnt do any jumps as such. It was a little bit muddy / boggy though..... The batteries I had in the last it ran were 2 x 2S lipos and the gearing is 68/17 if thats any help. Cheers, Trevor Quote Link to comment Share on other sites More sharing options...
carmst74 Posted March 3, 2011 Share Posted March 3, 2011 If you landed a jump on throttle, it could cause that Quote Link to comment Share on other sites More sharing options...
HairyEyeBall Posted March 3, 2011 Author Share Posted March 3, 2011 Oh I see, not sure if I have or not.... thanks for your input spud Quote Link to comment Share on other sites More sharing options...
.AJ. Posted March 4, 2011 Share Posted March 4, 2011 how old is the diff????? Quote Link to comment Share on other sites More sharing options...
gavinc Posted March 4, 2011 Share Posted March 4, 2011 I chewed one up recently but it was a diff from a 3906 and I was running 6s So was expecting it to go. Replaced it with a diff from your model the 3908. I did do some reading though and the standard cause is flexing of the diff cup under extreme load. That normally only seems to happen on 6s though so surprised to hear you had an issue running 2 x 4s. FLM do a metal cup and then there are metal diff cases too that apparently address the issue of stripped gears but I think you have just been unlucky, especially if you are just running 4s...... My e-revo runs the same diffs, I run it exclusively on 6s, have bashed it very hard, taken it off some big jumps and have jammed the throttle on landing many, many times. So I wouldn't fork out on FLM cups or any upgrades yet I would just replace the damaged internals or buy a new diff if its cheaper, I got mine from the US for Quote Link to comment Share on other sites More sharing options...
HairyEyeBall Posted March 4, 2011 Author Share Posted March 4, 2011 how old is the diff????? its only few months old I chewed one up recently but it was a diff from a 3906 and I was running 6s So was expecting it to go. Replaced it with a diff from your model the 3908. I did do some reading though and the standard cause is flexing of the diff cup under extreme load. That normally only seems to happen on 6s though so surprised to hear you had an issue running 2 x 4s. FLM do a metal cup and then there are metal diff cases too that apparently address the issue of stripped gears but I think you have just been unlucky, especially if you are just running 4s...... My e-revo runs the same diffs, I run it exclusively on 6s, have bashed it very hard, taken it off some big jumps and have jammed the throttle on landing many, many times. So I wouldn't fork out on FLM cups or any upgrades yet I would just replace the damaged internals or buy a new diff if its cheaper, I got mine from the US for Quote Link to comment Share on other sites More sharing options...
Tug Posted March 4, 2011 Share Posted March 4, 2011 Check the paperwork, but I think the default is auto cell count, but don't quote me on that. If it is on auto, you'll here it count the number of cells right after the first multi-tone when you switch on. Quote Link to comment Share on other sites More sharing options...
NOFX Posted March 5, 2011 Share Posted March 5, 2011 Hi.I was eating diffs in the MMM'd summit,I had to sacrifice wheelies for tranny longevity ( tranny,always makes me smile).I loosened the slipper a little Quote Link to comment Share on other sites More sharing options...
HairyEyeBall Posted March 5, 2011 Author Share Posted March 5, 2011 Check the paperwork, but I think the default is auto cell count, but don't quote me on that. If it is on auto, you'll here it count the number of cells right after the first multi-tone when you switch on. had a look and yeah auto is the default Hi.I was eating diffs in the MMM'd summit,I had to sacrifice wheelies for tranny longevity ( tranny,always makes me smile).I loosened the slipper a little ok cool, i'll give that a whirl to. i'd like to keep my tranny intact for as long as possible lol cheers chaps Quote Link to comment Share on other sites More sharing options...
KCS Posted March 9, 2011 Share Posted March 9, 2011 The default puch setting is at the highest (must be level 5 or 6). Drop this by a couple at least and you will be kinder to your trany. Mine is set on the second lowest and it will still do wheelies on grass with 6S. Quote Link to comment Share on other sites More sharing options...
HairyEyeBall Posted March 9, 2011 Author Share Posted March 9, 2011 thanks for the advice spud, once I get the new internals i'll give that a go too Quote Link to comment Share on other sites More sharing options...
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