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Old 09-23-2007, 01:08 AM   #1
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Default Servo Problems!

Can someone please explain something to me? When I turn Left and Right I hear a rattling. I got my transmitter trim at 100%. I hear it when I make turns but when it goes straight I don't hear anything. I am using a Futaba 3PK and my Servo is a FUTABA S9550.

I get this funny vibration and rattling when I let the car go full throttle and turn left and right at 100%. I tried putting it on a work stand and tried it that way but I still hear it. the only time I don't hear it was when I adjusted the steering down to 30%.

So I took off the steering horn and tried it without the wheels moving but just the servo turning and and now everything sounds good. No rattling and No vibration. Once i attached the servo horn again it did it again.

I checked and theres nothing rubbing on anything or atleast thats what I see. Can someone please help me.
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Old 09-23-2007, 02:51 AM   #2
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I guess that you mean that you have the steering end point adjustment (EPA) set to 100%?

Sometimes the servo range can be too much for the steering throw and especially the CV's, and you get a stuttering wobble kind of thing at full lock. I get this on my BJ4, so I have to set the EPA at less than 100%. (I think I set my TC5 at about 30-40% because the steering is so good on that car)

On a touring car, you should set the steering for the tightest corner on the track. Setting it futher will make the car work against itself as you go through the corner, as the tires can't maintain traction at the speed that you are going, especially if you are just turning full for the corner, instead of feeling the steering through the corner and steering accordingly.

I suggest turning the radio and car on, turning the wheels to full lock in either direction, and then turn the EPA down until the stuttering stops.

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Warwick.

Last edited by B4Bandit; 09-23-2007 at 04:28 AM.
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Old 09-23-2007, 08:55 AM   #3
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Default Great Advise

I am going to do that right away. Thanks a whole a lot yo. I love my TC5. I am just waiting to hit the track for the first time in 10 years.
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Old 09-23-2007, 10:03 AM   #4
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There's a good chance that "rattling" sound is the inside or edge of the car rims hitting a part of the suspension. Look closely, a slight wheel wobble or scuff there will hit something on and off make a lot of noise. Not to mention it will adversely affect your car's handling. I have found I need to set up my steering throw so I can't quite fully lock the wheel - otherwise handling on the car is affected.
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Old 09-23-2007, 08:40 PM   #5
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Quote:
Originally Posted by Renuco612 View Post
I am going to do that right away. Thanks a whole a lot yo. I love my TC5. I am just waiting to hit the track for the first time in 10 years.
Good luck with the car, it's a fantastic ride
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Old 09-23-2007, 09:48 PM   #6
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Default still wobbling.

I tried something new. I took off the front wheels and set the Steering EPA at 100% and this time I don't get the wobbling and rattling sound. But once I put the wheels back on I get the wobbling and rattling again. So then I have to set the Steering EPA back at 30% or lower. Is there something I'm missing?
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Old 09-23-2007, 10:35 PM   #7
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Any chance your running a spool?

A spool, or tight front diffs will have chatter as your getting

If its chatter, thats normal with a spool

Grease up your outdrives (like alot) gets rid of chatter for me
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Old 09-23-2007, 10:40 PM   #8
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Default Thats true

Thats sounds like it could be it. I had this problem when I was running diffs but it wasn't so bad. But now I am running a spool it sounds nasty. So is there a permanent fix or what do I have to do?

So is going back to diffs better for me?
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Old 09-23-2007, 10:44 PM   #9
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Quote:
Originally Posted by Renuco612 View Post
Thats sounds like it could be it. I had this problem when I was running diffs but it wasn't so bad. But now I am running a spool it sounds nasty. So is there a permanent fix or what do I have to do?

So is going back to diffs better for me?
Yup theres what the chatter is coming from


Just take apart for cvd's, and grease the heck out of them so there nice and greased

And then do the same on th eout drives... I no longer have any chatter by doing that

Each racer does his own thing really, but I do bolth....

No, keep the spool, just take out some epa, and tune your car to have more steering... Because chatter is just slowing you down by binding up the front.....But the spool is better just have to get it all right
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Old 09-24-2007, 08:08 AM   #10
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Quote:
Originally Posted by Renuco612 View Post
I tried something new. I took off the front wheels and set the Steering EPA at 100% and this time I don't get the wobbling and rattling sound. But once I put the wheels back on I get the wobbling and rattling again. So then I have to set the Steering EPA back at 30% or lower. Is there something I'm missing?
This says its almost certainly in the wheels.

Is one of your wheels broken or even cracked a little?
Is one of your wheels warped, even a little?
Is the clearance on your wheels to ballcups, etc. very close?

Typically I have to set EPA to 75-85% max to keep from binding on the ends of travel and hitting the wheels. Otherwise I get what you note unless the wheels are about perfect. You may also be able to put a washer (spacer) under the wheels on the axle to space them out slightly. Just be careful if your track has strict width restrictions not to exceed them.
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Old 09-24-2007, 02:26 PM   #11
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Default i need help

I checked my wheels and I'm sure they are fine because they are brand new RP30 wheels. Is there something else i should check? should i adjust my belt tension?
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Old 09-24-2007, 02:32 PM   #12
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i have had the same problem with mine two its rubbing ur shocks. btw what u gotta do is get a smaller diameter of tires for u can sand the outside of it
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Old 09-24-2007, 03:42 PM   #13
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Are you sure your wheel is not hitting anything when you turn it and pull the trigger? My TC3 did this all the time. When I turned the wheel the inside edge would just barely hit the shocks, arm, ballcup or something. Clearance was small and it would just barely touch and make a racket. Also hinge pin coming out a little would rub the inside of the hub so this is another possibility.

http://www.teamassociated.com/enlarge/30103d.htm
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Old 09-24-2007, 05:39 PM   #14
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I just checked right now and I'm 100% sure there is nothing rubbing. What I did notice is that there is a little play with my caster and steering block. My wheels has some tiny play also. Is this normal?
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Old 09-24-2007, 06:27 PM   #15
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Its your spool man.....
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