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07-08-2013, 10:28 AM | #1 |
Rock Stacker Join Date: Mar 2013 Location: Salt Lake City
Posts: 70
| Upgrading from the stock SCX10 20t/Diagnosing an issue
I have a couple of questions about whether or not to upgrade the motor on my truck. The first comes from something I apparently broke. Let me explain. The last time I was out crawling my truck started having an issue. While on flat ground things seem fine...maybe a little slow. When I start climbing and have to put some power down the truck makes this awful grinding sound and none of the wheels turn. I'm in the process of adding metalhead axles so I've been able to take most of the drivetrain apart. By most, I mean everything but the motor. Nothing was amiss in the (stock) axles or the transmission. Nothing looked stripped or broken. Neither of the drive shafts look chewed up either. The spur gear is fine too. The only component left that I can think of is the motor. As I disassembled/assembled things, the motor seems to spin with what I could assume is a pretty normal and reasonable amount of resistence. To sum it up, I'm not really sure what the deal is. I haven't driven the truck for a while because of this build...I've been taking my time and/or waiting for parts to come in. I've been thinking that I may have damaged the motor somehow? I'm currently running aftermarket wheels w/1.9 pitbull rockbeasts. The trail I was on is fairly extreme. I just thought there was ususally supposed to be smoke and/or burning smells when a motor dies. Aside from all that, I'm wondering if it would be wise to upgrade my motor since I'm adding a fair amount of weight to my truck. Here's the configuration, just to give an idea: SCX10 Chassis Axial 313mm Aluminum Links GCM Metalhead aluminum axle housings Motoworx 1.9 10 Hole LE Aluminum wheels (including a full spare w/a 1.9 tire) Savox Servo Castle BEC 5200 MaH Lipo RC4WD JK recovery front bumper. Nothing too extreme, but the truck has definitely gained some weight. Should I upgrade the motor? Does upgrading just mean buying something that has a higher turn count? I like the wheel speed of the Axial 20t, but I want a motor that will stand up to a rig with a bit of metal. Possibly something like Holmes Hobbies LLC That's a wall of text. Any input on these two issues will help! Last edited by CHawk68462; 07-08-2013 at 10:39 AM. |
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07-08-2013, 10:52 AM | #2 |
Rock Crawler Join Date: Feb 2009 Location: Wrightstown
Posts: 960
| Re: Upgrading from the stock SCX10 20t/Diagnosing an issue
Is there a slipper clutch? Might be a little too loose. It's the only thing I can think of.
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07-08-2013, 10:56 AM | #3 |
Rock Stacker Join Date: Mar 2013 Location: Salt Lake City
Posts: 70
| Re: Upgrading from the stock SCX10 20t/Diagnosing an issue
I thought about that. Do they come loose? The issue came on pretty suddenly. Otherwise the truck has never had problems putting power down.
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07-08-2013, 11:07 AM | #4 |
Rock Crawler Join Date: Feb 2009 Location: Wrightstown
Posts: 960
| Re: Upgrading from the stock SCX10 20t/Diagnosing an issue
I've seen them come loose but I crank mine as tight as I can get it.
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07-08-2013, 11:14 AM | #5 |
Rock Crawler Join Date: Jan 2006 Location: Phoenix
Posts: 573
| Re: Upgrading from the stock SCX10 20t/Diagnosing an issue
I have had the stock motor plate flex on me causing the pinion to loose most of its contact with the spur and make a grinding noise, but you said the spur looked good, maybe check it closer, just my 2 pennies
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07-08-2013, 06:56 PM | #6 |
Rock Stacker Join Date: Mar 2013 Location: Salt Lake City
Posts: 70
| Re: Upgrading from the stock SCX10 20t/Diagnosing an issue Something like this is possible. My spur isn't damaged, but I'll take a look at it again. If that's the only problem ill be happy.
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07-10-2013, 10:03 AM | #7 |
Rock Stacker Join Date: Mar 2013 Location: Salt Lake City
Posts: 70
| Re: Upgrading from the stock SCX10 20t/Diagnosing an issue
Here's an update. I got the truck all put together and running yesterday. Something is definitely amiss. The transmission, or something in that area, is louder than normal. I need to check the gear meshing on the spur. I had the transmission apart recently, but I re-lubed it before I put it back together. Another thing worth noting is that the output shafts on the transmission have a wobble to them. I'm wondering if something got bent the last times I drove my truck. Given that this doesn't seem to be much of an electrical problem, I may move this into a different forum. |
07-10-2013, 11:00 AM | #8 |
Pebble Pounder Join Date: Apr 2013 Location: Central PA
Posts: 121
| Re: Upgrading from the stock SCX10 20t/Diagnosing an issue
If there is a wobble in your transmission, then you may have a bad bearing in there somewhere.
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