03-06-2015, 06:26 AM | #1 |
Newbie Join Date: Jan 2015 Location: Amherst
Posts: 41
| Gear Reduction Unit
Hello: I have an HPI GRU and the 16 tooth pinion does not seem to fit with the GRU. It fits when I use the motor mount and the 16 tooth, but not when the motor mount and pinion are attached to the GRU. I can't figure out what the problem is. The mount is in the correct holes for the 16 tooth, but does not mesh! With a 50 or 55 turn motor and the 16 tooth, without the GRU, is the GRU really needed? I plan to use 1.9 tires on the rig. Thanks |
Sponsored Links | |
03-06-2015, 07:01 AM | #2 |
RCC Addict Join Date: Dec 2007 Location: Moncton, NB, Canada
Posts: 1,962
| Re: Gear Reduction Unit
I haven't used a GRU, but to answer the second part of your question, a 55t motor will work, but it'll still be sort of fast. I have one in mine, and it's faster than walking pace that's for sure at full throttle, but I still have decent low end control. Most people, if they don't use a GRU, go to like a 65t or higher motor. Since they're easy to change in these trucks, just try it out to see if you like it, you might be surprised.
|
03-06-2015, 08:30 AM | #3 |
I wanna be Dave Join Date: Sep 2011 Location: Douglassville, PA
Posts: 4,225
| Re: Gear Reduction Unit
Probably not sitting flush. using the HPI GRU requires a bit of chassis trimming along the bottom to seat all the way.
|
03-06-2015, 09:02 PM | #4 |
Rock Crawler Join Date: Dec 2014 Location: In the sticks
Posts: 913
| Re: Gear Reduction Unit
Several videos on youtube of people installing the GRU in their CC01's. I just installed one in mine last week. Some carving required, but the results are awesome. With 1.9 Trepadors, 16 tooth pinion and a 27T motor it runs at a normal walking pace and will eat every gear in the transmission without even thinking about bogging. |
03-06-2015, 09:11 PM | #5 |
Rock Crawler Join Date: Dec 2014 Location: In the sticks
Posts: 913
| Re: Gear Reduction Unit |
03-07-2015, 02:07 PM | #6 |
Newbie Join Date: Jan 2015 Location: Amherst
Posts: 41
| Re: Gear Reduction Unit
Thanks to all! |
Gear Reduction Unit - Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Which Gear Reduction unit?? | CraZySteve | Tamiya Txt-1 and Juggernaut | 3 | 11-17-2010 07:48 AM |
Which Gear Reduction unit? | CraZySteve | General Crawlers | 2 | 11-10-2010 07:36 PM |
Gear Reduction Unit | mxmissile | Newbie General | 4 | 02-01-2006 06:34 PM |
| |