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Old 02-19-2009, 08:11 PM   #1
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Default B4 grinds a little when taking off sometimes...

I'm running a 10.5 LRP Eraser/LRP AI combo, Venom 7.4 lipo, and my gearing is 24/81 (I think the spur is 81, whatever comes with the FT kit) I notice when I take off, sometimes I hear a slight grinding sound, it ONLY does it when taking off from a dead stop. If my gear mesh was too tight, it would do it all the time, right? What could it be if not that?
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Old 02-19-2009, 08:12 PM   #2
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it is either your gear mesh or diff
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Old 02-19-2009, 08:22 PM   #3
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If everything in the drive train is free and in good shape. Make sure your motor timing is not too high, either on the motor or ESC. When you run brushless motor timing too high the motor will cog. This cogging will sound very much like gears grinding. Hope this helps.
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Old 02-19-2009, 08:23 PM   #4
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check your idler gear and input shaft bearings also
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Old 02-19-2009, 09:30 PM   #5
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Originally Posted by SpraydbySprague View Post
If everything in the drive train is free and in good shape. Make sure your motor timing is not too high, either on the motor or ESC. When you run brushless motor timing too high the motor will cog. This cogging will sound very much like gears grinding. Hope this helps.
Well sometimes the car just won't go period, but then I noticed one of the banana plugs was loose. Tightned it and the sound went away and it stopped "stalling". Problem solved
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Old 02-19-2009, 10:10 PM   #6
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Well sometimes the car just won't go period, but then I noticed one of the banana plugs was loose. Tightned it and the sound went away and it stopped "stalling". Problem solved
I tend to stay away from those bullet connectors, they can cause some wacky things over time.
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Old 02-23-2009, 03:40 PM   #7
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Well sometimes the car just won't go period, but then I noticed one of the banana plugs was loose. Tightned it and the sound went away and it stopped "stalling". Problem solved
A ha! It's the simple things we never think about giving us the most problems. Glad too see the problem is fixed.
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Old 02-23-2009, 08:29 PM   #8
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i had a grinding issue thes weekend to. mine ended up being my diff was to tight and seized. i ate right through the rings and ruined a few carbide balls. i choked it up to a learning experience. i am used to gear diffs
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Old 02-24-2009, 12:56 AM   #9
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check gear mesh, diff, and slipper.
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