R/C Tech Forums

Go Back   R/C Tech Forums > General Forums > Electric Off-Road

Like Tree12Likes
Reply
 
Thread Tools Search this Thread
Old 06-18-2015, 07:19 AM   #826
Tech Elite
 
Hoese37's Avatar
 
Join Date: Apr 2007
Location: Hutchinson, MN
Posts: 3,819
Trader Rating: 5 (100%+)
Default

What car?
__________________
Tekno R/C
FTR 510 Raceway
Team FTR
REX Engines USA
RW Mods
Hoese37 is offline   Reply With Quote
Old 06-18-2015, 07:23 AM   #827
Tech Apprentice
 
Join Date: Jun 2015
Posts: 65
Default

Quote:
Originally Posted by Hoese37 View Post
What car?
Mugen Mbx7 Eco
Italo2275 is offline   Reply With Quote
Old 06-18-2015, 07:32 AM   #828
Tech Champion
 
ThePanda's Avatar
 
Join Date: Jul 2013
Location: Michigan
Posts: 6,990
Trader Rating: 64 (100%+)
Default

Did you do a "run in" period with the diff tight? Often when it feels to tight it is that the gears need to wear a tad to mesh we'll together. Try running it for a little bit. If it still feels too tight stop. Running it too loose though is certainly a way to chew up gears.
ThePanda is offline   Reply With Quote
Old 06-18-2015, 07:48 AM   #829
Tech Apprentice
 
Join Date: Jun 2015
Posts: 65
Default

Quote:
Originally Posted by ThePanda View Post
Did you do a "run in" period with the diff tight? Often when it feels to tight it is that the gears need to wear a tad to mesh we'll together. Try running it for a little bit. If it still feels too tight stop. Running it too loose though is certainly a way to chew up gears.
Thanks I will try that
Italo2275 is offline   Reply With Quote
Old 06-19-2015, 03:25 AM   #830
Tech Regular
 
Join Date: Oct 2012
Location: North East Ohio
Posts: 410
Trader Rating: 1 (100%+)
Default

Quote:
Originally Posted by Graham11 View Post
Damn wish I didn't just cancel my SMC order then haha. Trinity is going to replace my d8 but I wanted to try the SMC.

On another note my Eco is two races old and today i opened the diff cases and found significant rusting on the 44t gear and around the bearings, then I checked my nitro buggy which is 1 week old and same thing. I've had a bunch of brands and never once have had anything rust. What's up?
That's weird. I don't know what to tell you. I have a little bit of rust i need to scotch brite off but that's because i yanked the electronics and thru it in the dish washer
Dont Hack Me is offline   Reply With Quote
Old 06-19-2015, 05:53 AM   #831
Tech Adept
 
criss2115's Avatar
 
Join Date: Oct 2009
Posts: 219
Trader Rating: 6 (100%+)
Default Diff shims

A lot of confusion on here about diff gear shimming. It's almost the same as setting the motor pinion to the center diff gear. You want just a small amount of lash once everything to tightened up. Hold the pinion gear on the outside of the diff case by grabbing the center driveshaft. Looking at the bottom of the diff use your other finger and check lash. Shim appropriate to have just a small amount of lash. Then grease and install on chassis. The gears wear so check this lash on every rebuild. Hope this helps.
criss2115 is offline   Reply With Quote
Old 06-19-2015, 06:16 AM   #832
Tech Apprentice
 
Join Date: Jun 2015
Posts: 65
Default

Quote:
Originally Posted by criss2115 View Post
A lot of confusion on here about diff gear shimming. It's almost the same as setting the motor pinion to the center diff gear. You want just a small amount of lash once everything to tightened up. Hold the pinion gear on the outside of the diff case by grabbing the center drive shaft. Looking at the bottom of the diff use your other finger and check lash. Shim appropriate to have just a small amount of lash. Then grease and install on chassis. The gears wear so check this lash on every rebuild. Hope this helps.
I have tried what you said, the problem is that whit one shim feels good till I tighten up all the screws then when I try to turn the gear it is definitely too tight as if it is grinding.
If I do the same without shims its too loose and feel no grip.
Italo2275 is offline   Reply With Quote
Old 06-19-2015, 08:15 AM   #833
Tech Master
 
mxnickj's Avatar
 
Join Date: Nov 2009
Location: Lewisburg PA
Posts: 1,811
Trader Rating: 51 (100%+)
Default

Has anyone tried the underdrive rear diff gears or have any input on them? I only have a few packs on the car so I'm still trying to find that real sweet spot but haven't really read or heard much about the underdrives. Just curious to hear some input on them.
mxnickj is offline   Reply With Quote
Old 06-19-2015, 11:20 AM   #834
Tech Adept
 
criss2115's Avatar
 
Join Date: Oct 2009
Posts: 219
Trader Rating: 6 (100%+)
Default Gear mesh

Quote:
Originally Posted by Italo2275 View Post
I have tried what you said, the problem is that whit one shim feels good till I tighten up all the screws then when I try to turn the gear it is definitely too tight as if it is grinding.
If I do the same without shims its too loose and feel no grip.
The 6 used spiral cut gears and usually the washer went on the gear side to tighten up everything. Ever since the 7 came out my washer has always been on the case side. I have also bought Kyosho washers as they are thinner for when you need just a little.
Try putting the washer on the diff cup side and tighten everything up.
criss2115 is offline   Reply With Quote
Old 06-19-2015, 11:40 AM   #835
Tech Master
 
Join Date: Apr 2012
Location: Mc Rae, AR
Posts: 1,292
Trader Rating: 65 (100%+)
Default

Quote:
Originally Posted by mxnickj View Post
Has anyone tried the underdrive rear diff gears or have any input on them? I only have a few packs on the car so I'm still trying to find that real sweet spot but haven't really read or heard much about the underdrives. Just curious to hear some input on them.
They help me on small technical tracks. I have an extra set ring and pinion for sale if you want to try them.
Thunder Trail is offline   Reply With Quote
Old 06-20-2015, 04:06 PM   #836
Tech Master
 
OfnaJoe's Avatar
 
Join Date: Dec 2008
Location: Bristol Va
Posts: 1,570
Trader Rating: 58 (100%+)
Default

I just got my build done and spent a longtime on freeing up the drivetrain, I set the car down to take a pic and it rolled off, smoothest car I have ever owned and I have been doing this since "84
__________________
Mugen Seiki \\ Dialed RC \\ Tekin \\ SMC \\ AVID\\ AKA \\ Futaba
OfnaJoe is offline   Reply With Quote
Old 06-20-2015, 04:24 PM   #837
Tech Master
 
werner sline's Avatar
 
Join Date: Dec 2012
Posts: 1,825
Default

Quote:
Originally Posted by OfnaJoe View Post
I just got my build done and spent a longtime on freeing up the drivetrain, I set the car down to take a pic and it rolled off, smoothest car I have ever owned and I have been doing this since "84
what ofna cars did you own that you can compair with the mugen ?
werner sline is offline   Reply With Quote
Old 06-20-2015, 04:35 PM   #838
Tech Master
 
OfnaJoe's Avatar
 
Join Date: Dec 2008
Location: Bristol Va
Posts: 1,570
Trader Rating: 58 (100%+)
Default

I owned Hyper 7, 8 and 9s and Jammin X1 and X2, but none compared to the Mugens I have owned, MBX5, MBX5T, MBX6, MBX6R, MBX6T, MBX6TR, MBX6 ECO, MBX7, MBX7T, MBX7 ECO and now the MBX7 R Eco,
__________________
Mugen Seiki \\ Dialed RC \\ Tekin \\ SMC \\ AVID\\ AKA \\ Futaba
OfnaJoe is offline   Reply With Quote
Old 06-20-2015, 04:51 PM   #839
Tech Master
 
werner sline's Avatar
 
Join Date: Dec 2012
Posts: 1,825
Default

Quote:
Originally Posted by OfnaJoe View Post
I owned Hyper 7, 8 and 9s and Jammin X1 and X2, but none compared to the Mugens I have owned, MBX5, MBX5T, MBX6, MBX6R, MBX6T, MBX6TR, MBX6 ECO, MBX7, MBX7T, MBX7 ECO and now the MBX7 R Eco,
great ! 1 special detail : on the mbx7, how does the front cvd ( the one from the center diff to the front gearbox ) wear ? my hyper 9e/hyperstar e wears those too fast !
what about the mugen front arms said to be fragile ? compaired to the hyper 9e ?
werner sline is offline   Reply With Quote
Old 06-20-2015, 06:43 PM   #840
Tech Master
 
spurcheck's Avatar
 
Join Date: Feb 2006
Location: Last in the "Z" main
Posts: 1,628
Trader Rating: 1 (100%+)
Default Newbie to this buggy

Hey guys, hoping to get some enlightenment from those who know. Making my way back to 1/8th electric off road and chose this vehicle as my platform. My local track is a frenzy of Tekno vehicles but I drove a Mugen several years ago and it seemed to fit me better. Since you guys are up on the vehicle what spares should I obtain on my first order. And then spares to obtain on my secondary order.
__________________
The Punter or The Punt-ee,,,,,,,,,,,,,,,,,,,who you be??

No Apologies Racing, don't believe me, try me!!!!!
spurcheck is offline   Reply With Quote
Reply



Currently Active Users Viewing This Thread: 2 (0 members and 2 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off



All times are GMT -7. It is currently 02:33 PM.


Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net