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Thread: Diff resistance

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Old 09-16-2018, 10:01 AM   #1
Rock Stacker
 
Join Date: Sep 2016
Location: Frisco
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Default Diff resistance

I have a question about differential/axle resistance. I have the Helical gear in my front diff and the standard in the rear. Both are shimmed I think properly although there is more play in the rear. The front I did not have to add any shims where the rear I added some. Right now with the drive shafts NOT connected when I spin the tires by hand the rear is alot more free. The front has more resistance when turning the wheel.

Is this due to the Helical gear, shimming or something else?

Thanks in advance.
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Old 09-16-2018, 10:17 AM   #2
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Join Date: May 2018
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Default Re: Diff resistance

Quote:
Originally Posted by GR8 PMKN View Post
I have a question about differential/axle resistance. I have the Helical gear in my front diff and the standard in the rear. Both are shimmed I think properly although there is more play in the rear. The front I did not have to add any shims where the rear I added some. Right now with the drive shafts NOT connected when I spin the tires by hand the rear is alot more free. The front has more resistance when turning the wheel.

Is this due to the Helical gear, shimming or something else?

Thanks in advance.
Sounds like the helical cut gear was a tight fit and may be causing the binding

Sent from my LGLS991 using Tapatalk
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Old 09-16-2018, 10:18 AM   #3
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Default Re: Diff resistance

Try running it and see if it loosens up keep an eye on esc and motor temps if its real tight it will over heat them

Sent from my LGLS991 using Tapatalk
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Old 09-16-2018, 10:50 AM   #4
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Default Re: Diff resistance

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Originally Posted by bent_hinge_pin View Post
Try running it and see if it loosens up keep an eye on esc and motor temps if its real tight it will over heat them

Sent from my LGLS991 using Tapatalk
Sounds like a plan. The helical gear was tight on installation. I did habe some heat problems the last run, but accounted that to the 1.9's I put on without changing gear ratio.
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Old 09-17-2018, 02:02 PM   #5
MEOW
 
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Default Re: Diff resistance

Quote:
Originally Posted by bent_hinge_pin View Post
Try running it and see if it loosens up keep an eye on esc and motor temps if its real tight it will over heat them

X2, good quality high pressure grease will help. Helical gears like these tend to have a bit more friction by nature as the gear teeth slide against each other more. Getting mine ready to install so we'll see how tight mine are.
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Old 09-22-2018, 04:12 PM   #6
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Default Re: Diff resistance

Tore it apart and something isn't true. Either the gear or the housing. I can turn it so far and then it binds, appears to be in the spot on every rotation.
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Old 09-22-2018, 09:46 PM   #7
MEOW
 
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Default Re: Diff resistance

Shim it so it’s not too tight at tight spot, use good grease and run it. Should seat in ok.
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Old 09-22-2018, 10:03 PM   #8
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Default Re: Diff resistance

This is with just the ring gear. The cover and pinion are not attached.
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Old 10-01-2018, 11:00 AM   #9
MEOW
 
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Default Re: Diff resistance

Make sure both bearings are fully and squarely seated on the ring gear/spool. Pictures?
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