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Buggy Diffing out when braking? Skidding out

Buggy Diffing out when braking? Skidding out

Old 06-02-2017, 03:15 PM
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JAE
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Default Buggy Diffing out when braking? Skidding out

Not technically diffing out but same effect while braking... 2wd buggy skids out a bit sideways while braking in a straight line. Have two identical buggies set up basically the same way. One does it, the other doesn't. It brakes in a straight line like I have the wheels turned a little bit. Anyone know where to start?
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Old 06-02-2017, 03:41 PM
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A rear roll center that is much higher than the front will typically result in the same thing happening.
Originally Posted by JAE View Post
Not technically diffing out but same effect while braking... 2wd buggy skids out a bit sideways while braking in a straight line. Have two identical buggies set up basically the same way. One does it, the other doesn't. It brakes in a straight line like I have the wheels turned a little bit. Anyone know where to start?
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Old 06-02-2017, 03:56 PM
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just turn down the brake so it doesn't lock up anymore?
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Old 06-05-2017, 12:59 AM
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Buggy will slide a bit when not even braking that hard... strange and the roll centers are pretty even (1mm front tower 1mm front hub as 2/2 for rear as well) ...

Originally Posted by nicholasxuu View Post
just turn down the brake so it doesn't lock up anymore?
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Old 06-05-2017, 02:15 AM
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Originally Posted by JAE View Post
Not technically diffing out but same effect while braking... 2wd buggy skids out a bit sideways while braking in a straight line. Have two identical buggies set up basically the same way. One does it, the other doesn't. It brakes in a straight line like I have the wheels turned a little bit. Anyone know where to start?
First thing is make sure your shocks are all set to equal preload, droop and springs are set evenly. If possible put it on a set of corner scales and try to get the rear weights even. Make sure the chassis isn't twisted. Also make sure you have the left/right balance as close to equal as possible.

Other options:
- check rear wheel bearings and diff output bearings for any tight / seized parts
- make sure the rear toe is equal left/right
- make sure the wheelbase is equal left/right

Hope this helps.

Ray
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Old 06-05-2017, 08:29 AM
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Checked most of that but not diff bearing or chassis tweak. Thanks!
Originally Posted by ray_munday View Post
First thing is make sure your shocks are all set to equal preload, droop and springs are set evenly. If possible put it on a set of corner scales and try to get the rear weights even. Make sure the chassis isn't twisted. Also make sure you have the left/right balance as close to equal as possible.

Other options:
- check rear wheel bearings and diff output bearings for any tight / seized parts
- make sure the rear toe is equal left/right
- make sure the wheelbase is equal left/right

Hope this helps.

Ray
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Old 06-05-2017, 08:48 AM
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Originally Posted by JAE View Post
Checked most of that but not diff bearing or chassis tweak. Thanks!
Sometimes a hex adapter can bind up, even if the bearings are ok.
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