|
| LinkBack | Thread Tools | Display Modes |
01-15-2018, 11:21 PM | #1 |
Newbie Join Date: Jan 2014 Location: DFW
Posts: 28
| Gears grind after replacing motor
I have two Tamiya kits I've built and wanted to slow them down by swapping the stock "torque tuned" 540 motor for a 55-turn RC4WD motor. My Mercedes Cabrio MF-01X rig took the motor swap with no problem. Slowed it down to a speed that is much more fun for mild trail runs... done! I did the same thing in my CC-01 FJ Cruiser, taking care to make sure the pinion gear is the exact same position, clearance etc. as the stock motor. But it ran with a grinding noise and when I went from forward to reverse, I could sense the gears were skipping somewhere. So I put it back on the workbench and checked everything, but still got the same result. I have checked and re-checked everything many times over, but get nowhere. I added the little cardboard motor insulator that came with the kit, still same thing. I went to a different motor, this time a 35T, still same result. Through all of this, if I went back to the original "torque tuned" motor, everything was silky smooth again. Any idea what I'm doing wrong? I figured changing the motor in the CC-01 should be simple like it was in the MF-01X, but somehow I can't get it to accept anything but the motor that came with the kit. Thanks all! Last edited by ScottDFW; 01-15-2018 at 11:23 PM. |
Sponsored Links | |
01-16-2018, 07:50 PM | #2 | |
Oppan Gangnam Style Join Date: Jun 2005 Location: Shingle Springs
Posts: 5,164
| Re: Gears grind after replacing motor Quote:
| |
01-17-2018, 07:39 PM | #3 |
Newbie Join Date: Jan 2014 Location: DFW
Posts: 28
| Re: Gears grind after replacing motor
Thanks Chino. Yes exact same pinion gear that came with the kit, same pinion gear that works fine with the stock motor. I'm beating my head against the wall on this one ! So frustrating. |
01-17-2018, 08:29 PM | #4 |
Oppan Gangnam Style Join Date: Jun 2005 Location: Shingle Springs
Posts: 5,164
| Re: Gears grind after replacing motor
Did you check the set screw? I've seen them catch the edge of the spur gear and make quite a racket.
|
01-17-2018, 09:05 PM | #5 |
Newbie Join Date: Jan 2014 Location: DFW
Posts: 28
| Re: Gears grind after replacing motor
I did not check the set screw for clearance, I'll try that next. Thanks!
|
01-18-2018, 06:34 AM | #6 | |
I wanna be Dave Join Date: Sep 2011 Location: Douglassville, PA
Posts: 4,218
| Re: Gears grind after replacing motor Quote:
OR the gear cover is not cinched down all the way. Check the pocket under the motor mount and make sure there's no debris that got under it. On a side note, I usually replace the tapping screws with machine screws after the gear cover is removed a few times. Much better bite into the plastic. Last edited by OSRC; 01-18-2018 at 06:37 AM. | |
Gears grind after replacing motor - Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Axle grind? | Brehrocks | Axial SCX-10 | 9 | 01-18-2014 11:20 AM |
Slow Grind | SlowGrynd | Axial Wraith | 27 | 10-10-2012 10:01 AM |
Grind the rocks | Uli | Axial AX-10 Scorpion | 33 | 09-17-2009 01:25 AM |
Replacing motor wire on a mamba max | metomwhou | Electronics | 2 | 04-27-2008 12:13 AM |
replacing stock txt motor... lathe? | dieselfuel | Newbie General | 3 | 05-23-2006 11:07 PM |
Thread Tools | |
Display Modes | |
| |