Squeeling noise from inside.

zipinzapin · #1 07-11-2005, 01:27 AM

I just put the orange gears and motor in my MT. The increased RPM's are making a horrible squeeling noise at high speeds. It sounds like something inside the gearbox needs to be lubed. If its a lube problem, is it a big deal to take the truck apart? If its another problem, please advise. Thanks.

rfnagel · #2 07-12-2005, 01:15 AM

Quote:

Originally posted by zipinzapin
I just put the orange gears and motor in my MT. The increased RPM's are making a horrible squeeling noise at high speeds. It sounds like something inside the gearbox needs to be lubed. If its a lube problem, is it a big deal to take the truck apart? If its another problem, please advise. Thanks.

I've had the same problem before. If your's is the same as mine, the problem is not the internal gears, but rather a little play or "slop" in the external idler gear.

Try this:

Hold your MT in the air by the body while pressing the throttle, it should probably make that screeching noise. Then, while doing the same, push slightly inwards on the external idler (middle) gear. No more noise?

If so, here's what I did. I bought a few nylon/teflon washers from the hardware store, and I installed one of them behind the idler gear (in other words, slip on the washer *before* slipping on/installing the idler gear) in order to take up the slack. Note that if the washer is too thick, the idler gear will stick out too far and won't mesh properly with the smaller gear on the motor... simply trial and error using various thicknesses of nylon washers.

Anyhow, if that's what's causing your problem, the above will help fix it -

Racer9 · #3 07-12-2005, 09:44 PM

my noise is definitely coming from inside. is there any way to fix it?

micro-rc-guy · #4 07-13-2005, 04:24 AM

Hmm i would say ,
Try to get hold of a needle end bottle , you know those ones used for really precise oiling ? . there almost like a injection needle on the top of a bottle . Fill a bit with oil insert the needle into a small crack / make a very small hole ( pinhole ) and sqeeze some oil inside . This should work , if not
I HAVE NO IDEA

zipinzapin · #5 07-13-2005, 09:48 AM

Thanks for your input guys. I decided to dissasemble the drive train and lightly oil it. WOW! What a pain in the you know what. The rear wasnt a problem but when you take apart the front end you have to be very careful of the springs, dogbones, steering rack. Its actually kinda neat how it all works. Reassembling it is where the real challenge lies. Its a testament to child slave labor because only small hands could do this job. I didnt find any specific sequence of doing it. Just trial and error. Be patient, it can be done!

Racer9 · #6 07-13-2005, 12:49 PM

my bro's truck had the same noise problem and i oiled it and it made it worse. so i disassembled both of them and cleaned up the oil in my bro's truck and then put it back together. I put some teflon powder in mine at all the moving pieces and it helped a little but my bro's was suddenly quiet again after removing the oil. I'm guessing there was dirt in it somewhere that i didn't see.

anbody have any other ideas? teflon powder works but not too well, oil just made a dirty mess... i've run out of ideas...

micro-rc-guy · #7 07-13-2005, 05:03 PM

vaseline ?
grease ?
Heard of something called " dry lubricant " i have no idea what it is but apparently its good for rc's.

Racer9 · #8 07-13-2005, 09:11 PM

i used teflon powder on mine. it's dry... it didn't help that much...

micro-rc-guy · #9 07-13-2005, 09:25 PM

Oh well , just a thaught.

frizzen · #10 07-13-2005, 10:40 PM

Sounds like your bevel gears aren't being kept meshed properly, but it'll be a lot of trial and error to fix it, plus the plastic bushings aren't the best for keeping parts perfectly aligned.

My guess would be that you need to move the bevel gears out slightly longer on the driveshaft. But that might not be where your issue is even though it seems the most likely.

rfnagel · #11 07-14-2005, 10:32 AM

Folks,

While I shudder at the idea of using any form of oil on the Zaps' internals, If you're going to use any sort of oil I'd reccomend "Labelle 108" -> http://www.google.com/search?num=100...22&btnG=Search . It's a real clean/fine machine oil, and has a small metal needle at the top of the bottle to apply small ammounts to tiny areas -> http://www.trainjunctionpro.com/HO%20Gau208.jpg

Racer9 · #12 07-14-2005, 01:27 PM

actually, that's exactly what I used on my bro's MT. after I got the oil cleaned off it worked properly again with no squeeling. but with it it was much worse...

Michael.mt2k · #13 12-18-2005, 01:41 PM

Great thread!

Now that I've grabbed a couple of motor kits, my MTs squeal too.

Any links on where to find those washers for spacing out the idler gear?

chilli_mp138 · #14 12-18-2005, 03:51 PM

While you're out buying the MT motor/gear upgrade kit to get your orange set, pick up an SE gear kit (or head to your parts box). But, before you go, look at my fast gearbox mod tutorial--it has a better gear ratio (thus speed) than you can get with RS's MT motor/gear upgrade kit. You'll have to build some of your own gears. For me, that's a part of the fun; perhaps it will be for you, too. If you give it a try, let me know how it goes.

chilli
www.gcrossett.com/zipzaps/

Michael.mt2k · #15 12-19-2005, 10:19 PM

First of all, you are insane.

Your site is really nice.
The fast MT gearing stuff is beautifully photographed!
So darn CLEAR!

I have all those ZZ and MS/BitcharG gears, plus multiple sets of the Hot Wheels/BitRacer gearsets also.

When i get the time I am going to study the MT mods on there very closely.

Thanks for the link!