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Old 03-13-2009, 08:27 AM   #1
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Default How do i use Shims?

My TT-01 has an extreme amount of play on the front wheels. And I was advised to use shims. How do i use them?
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Old 03-13-2009, 08:54 AM   #2
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My TT-01 has an extreme amount of play on the front wheels. And I was advised to use shims. How do i use them?
in this application, 'shims' are nothing more than washers. when washers are referred to as shims, it usually implies that they are very thin/precise.

procedure: identify the axis that needs additional material to take up the 'play', and add washers (shims) in the appropriate location, being careful not to add more shims than the gap will allow for.

done.

note: 'play' can come from more than just an unshimmed front end. old/worn ball cups, bearings, and poor part tollerances will all add up to a very sloppy car.

note 2: some slop is advisable as it allows for the racing surface imperfections to be absorbed rather than than transmitted to the chassis. how much depends on your ability and application.
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Old 03-13-2009, 09:33 AM   #3
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Note 3: Also make sure that the inner and outer diameters of the shims (or washers) are the correct dimensions so that they don't interfere with bearing seals, plastic parts, etc. You don't want to add unnecessary friction/wear if at all possible.

Note 4: The shims can be used to take slop out, or they can also be used to make the track wider (to a point), depending on which side of the "drive pin" or wheel hex they are placed on the axle.
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Old 03-13-2009, 10:53 AM   #4
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note: 'play' can come from more than just an unshimmed front end. old/worn ball cups, bearings, and poor part tollerances will all add up to a very sloppy car.
Everything on my TT-01 is new. I have only ran it 4times.
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Old 03-13-2009, 10:58 AM   #5
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typically you'll need to add shims to the suspension arms hinge pins. Look at where the hub carriers meet the arms and see if there is any play for/aft. You may also need shims on the axles between the bearing and drive hub. Hope this helps.
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Old 03-13-2009, 10:59 AM   #6
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Everything on my TT-01 is new. I have only ran it 4times.
new cars need to be shimmed too.
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Old 03-13-2009, 12:38 PM   #7
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typically you'll need to add shims to the suspension arms hinge pins. Look at where the hub carriers meet the arms and see if there is any play for/aft. You may also need shims on the axles between the bearing and drive hub. Hope this helps.
The wobble is coming form the drive cups with the dog bones in the front.

The one that wobbles is the one connected to the wheel.

So how would I put a shim there.
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Old 03-14-2009, 01:32 AM   #8
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The wobble is coming form the drive cups with the dog bones in the front.

The one that wobbles is the one connected to the wheel.

So how would I put a shim there.
If i am understanding what you posted, then you would need to buy new bearings to replace the bushings in the hubs.
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Old 03-14-2009, 07:36 AM   #9
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If i am understanding what you posted, then you would need to buy new bearings to replace the bushings in the hubs.
I have ball bearings
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