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Old 05-19-2004, 04:45 PM   #1
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new here, but my 4-tec is grinding...?

Hey all, im new here. But got a question...My electric 4-tec has been making this odd grinding noise lately. What started it, i was running it around in my friends driveway and he had a plastic lawn chair up, he distracted me for like 1/10 of a second (i swear thats all it takes) and my car went straight for the chair, and crash right on it.

So since then, it's been making this horrible grinding noise in the rear of the car, but i cant tell if its the drive shafts or the motor or what? In addition to the grinding, it maxxes out at about 10 mph since then. Pretty much its just slow and grinding.

What's the problem? Anybody?
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Old 05-19-2004, 04:48 PM   #2
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Check the rear differential for damage.
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Old 05-19-2004, 04:56 PM   #3
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ok thanks...but im sorry i'm not too familiar with some of the vocab in the R/C world (I know, shoot me now haha but i've never really gotten TOO into my cars until late)
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Old 05-19-2004, 05:03 PM   #4
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Take it to a local hobby shop. They'll know for sure what's wrong. Nobody on the forum is going to know for sure. One visit to the hobby store, you'll get a lot done and you might learn a thing or two from this great hobby.

Good Luck and Happy Motoring!
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Old 05-19-2004, 05:08 PM   #5
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That's what i was plannin on, but i've been in there about 6 times for my truck

haha but i was just hopin until i could get out, someone would have some ideas.
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Old 05-19-2004, 06:27 PM   #6
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up
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Old 05-19-2004, 09:22 PM   #7
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Default Re: new here, but my 4-tec is grinding...?

Quote:
Originally posted by t3guy
Hey all, im new here. But got a question...My electric 4-tec has been making this odd grinding noise lately. What started it, i was running it around in my friends driveway and he had a plastic lawn chair up, he distracted me for like 1/10 of a second (i swear thats all it takes) and my car went straight for the chair, and crash right on it.

So since then, it's been making this horrible grinding noise in the rear of the car, but i cant tell if its the drive shafts or the motor or what? In addition to the grinding, it maxxes out at about 10 mph since then. Pretty much its just slow and grinding.

What's the problem? Anybody?
you might want to try checking the gear mesh if it had a hard impact then most likely the motor changed position causing the motor to slow down ,make noise and also if its getting hot then this may very well be your problem ..the motor gear (pinion) and drive gear (spur ) are not adjusted correctly.. loosen up the motor and make sure theres some play between the gears then tighten the motor screws down and give it a run.. good luck. also if you have a manual it this information will be in there..
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Old 05-19-2004, 09:50 PM   #8
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Default um yeah the 4-tec

i would say check the gear mesh. i had the same problem with mine . but here is the thing the two stock gears on my car will make a grinding sound. and ive messed with them alot to get it to stop.. but it dont . now ive put on a new spur gear and it went away. or i can use the old spur with a new pinion.. so the stock pinion and spur get put back on the car and the sound comes back..... if that dont help just remove all the screws from the car tilll all you have is a pile of parts. then clean them all and put the car back together. yull need the practice!!! ive had my 4-tec about a year now and broke every part at least once. but i drive it hard and put it a way wet .
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Old 05-20-2004, 06:58 AM   #9
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Quote:
Originally posted by t3guy
That's what i was plannin on, but i've been in there about 6 times for my truck

haha but i was just hopin until i could get out, someone would have some ideas.
Take the motor out and try rolling the chassis to check for grinding.

THen with the motor out spin the armuture again check for grinding.
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Old 05-20-2004, 03:47 PM   #10
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Thanks for all the advice guys...this weekend i'll dig my 4-tec out of the burroughs of my garage.
haha since i've moved, it's been kinda of "disorganized" if you will.

Also, just so i know my car better, it has these two little white bars, and over top of them is a blue anodized casing. I think my stampede had this when i had it...can't remember. What is it? Heat sink?
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Old 05-20-2004, 06:09 PM   #11
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those are resitiors from the speed control i tossed mine and got an esc much much better
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Old 05-20-2004, 06:37 PM   #12
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resisters...right...and they do what?
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Old 05-24-2004, 01:01 AM   #13
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resistors are used to drop voltage on my esc i plug in a 7.2 volt batttey but after the esc im only getting 5.2 volts so on your sc those must be doing the same thing why there is a voltage drop i do not know
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