RCCrawler Forums

CyberManiaK · 02-09-2007, 01:56 AM

Hi.. i bought a used pair of motor mounts, don't know what brand are they.. but they look a lot like the thunder tech..

Well my problem is that when i install a 9T pinion it can't reach the main gear.. what i see is that the motor shaft is to short. when i mount the pinion almost on the end of the shaft, the pinion only touch the gear by something near 2 mm.. I try them that way and make a loud noise that doesn't sound normal

the motors are integy's 55 from towerhobbies.

Thank you !!

andrewmp6 · 02-09-2007, 04:41 AM

do you have adjustable motor mounts

Offroader5 · 02-09-2007, 06:43 AM

How thick is the mount? It may have been a custom machined part just made similiar to the Thundertech. Where did you buy the pinion gear? If the motor mount is the correct thickness and the pinion isn't some real short stubby version, you should have full contact across the width of the spur gear.

EagleOne · 02-09-2007, 09:12 AM

If you ordered the motors from tower Im guessing you got the RRP 9 tooth pinions here: http://www2.towerhobbies.com/cgi-bin...&I=LXEW94&P=ML

These are kinda stubby and thats prob. your problem... RC4WD makes some NICE pinions 6-12 or 13 I think... here is a link: http://rc4wdstore.com/index.php?cPath=37

Note how long the gear is...

Later,
Jake

Offroader5 · 02-09-2007, 09:23 AM

That's more than likely your issue. Those "stubby" pinions will work fine if mounting the motor like stock right to the gearcase...but when you add the thickness of the adj. motor mount, the pinion needs to be longer to grab the spur gear.

CyberManiaK · 02-09-2007, 11:00 AM

Thank you guys yeah my pinions are Robinson Racing, and now looking at RC4WD I never notice that Robinson's are shorter :-(..

So you mean i can use these pinions with out the motor mounts? When i tried that way. the pinion do reach the spur, but is far from the spur

PS. I don't want to hack my gearbox

DaViolentOne · 02-09-2007, 12:11 PM

Could also look at the RC Guy stuff... I use his mounts and pinions with no issues... Well, not true... I don't have the clear dust covers to see my lash.. Yet...;)

Offroader5 · 02-09-2007, 12:25 PM

Quote:

Originally Posted by CyberManiaK

Thank you guys yeah my pinions are Robinson Racing, and now looking at RC4WD I never notice that Robinson's are shorter :-(..

So you mean i can use these pinions with out the motor mounts? When i tried that way. the pinion do reach the spur, but is far from the spur

PS. I don't want to hack my gearbox

No, you do have to use adj. mounts for anything lower than the stock 13 tooth pinions. What I meant was that the pinion WOULD reach the spur gear IF you didn't have to take into account the thickness of the adj. mount itself. You just need to get longer pinion gears and then you install the adj. mounts that you have.

Those stubby pinions would only work if you had an aftermarket type gearbox like something that RC4WD sells which has the adjustability for the motor designed right into the gearbox.

STANG KILLA SS · 02-09-2007, 12:33 PM

BS i use RR 9T pinions on ALL my clods. with both thundertech motor mounts, and CPE motor mounts. i have no issues. and all the teeth on the gear. i also have the same integy 55T on all of them. im not sure what your doing wrong......
you dont have the pinion on backwards do ya? (set screw furthest from motor)

CyberManiaK · 02-09-2007, 01:08 PM

Here are some pics.

As you can see the pinion is in less than the middle of the gear. And i also have the pinion sittin on end of the shaft.
That one is the 10T that i will put in the rear, and in front i will use 9T

So?

DaViolentOne · 02-09-2007, 01:10 PM

Yea... I'd look into other pinions then... RC4WD or RC Guy...

'83 chevy · 02-09-2007, 02:21 PM

Quote:

Originally Posted by CyberManiaK

Her

thats how mine are, they dont make full contact with the entire spur but i have never had any problems. And i use integy 55 lathes,CPE adjustable mounts, and robinson racing pinions.

Offroader5 · 02-09-2007, 02:50 PM

With my 55t's, RC Guy mounts and pinions...I get full contact to the spur gear. Not only that, but the back end of the pinion is almost all the way on the motor shaft (I left about 1/16" between the pinion and the motor).

From the pic, the mount looks really thick...but I don't know, people have said that they use the same setup

If nothing else....spend a couple bucks and just get longer pinions.

CyberManiaK · 02-10-2007, 12:49 AM

Quote:

Originally Posted by Offroader5

With my 55t's, RC Guy mounts and pinions...I get full contact to the spur gear. Not only that, but the back end of the pinion is almost all the way on the motor shaft (I left about 1/16" between the pinion and the motor).

From the pic, the mount looks really thick...but I don't know, people have said that they use the same setup

If nothing else....spend a couple bucks and just get longer pinions.

Well i guess you are right.. I will buy a longer set of pinions and avoid all kinda of headache's

Thank you everybody..

jeeper_rc · 02-10-2007, 04:14 PM

the longer pinions are very noisy

02-09-2007, 01:56 AM	#1
CyberManiaK Pebble Pounder Join Date: Jan 2007 Location: So.Cal Posts: 146	Help with motor mounts Hi.. i bought a used pair of motor mounts, don't know what brand are they.. but they look a lot like the thunder tech.. Well my problem is that when i install a 9T pinion it can't reach the main gear.. what i see is that the motor shaft is to short. when i mount the pinion almost on the end of the shaft, the pinion only touch the gear by something near 2 mm.. I try them that way and make a loud noise that doesn't sound normal the motors are integy's 55 from towerhobbies. Thank you !!

02-09-2007, 04:41 AM	#2
andrewmp6 Rock Crawler Join Date: Apr 2006 Location: louisville Posts: 814	do you have adjustable motor mounts

02-09-2007, 06:43 AM	#3
Offroader5 Picky Fab'r/Acetal Junky Join Date: Jul 2006 Location: Arizona Desert/AJ Posts: 3,073	How thick is the mount? It may have been a custom machined part just made similiar to the Thundertech. Where did you buy the pinion gear? If the motor mount is the correct thickness and the pinion isn't some real short stubby version, you should have full contact across the width of the spur gear.

02-09-2007, 09:12 AM	#4
EagleOne Pebble Pounder Join Date: Aug 2006 Location: Mobile AL Posts: 121	If you ordered the motors from tower Im guessing you got the RRP 9 tooth pinions here: http://www2.towerhobbies.com/cgi-bin...&I=LXEW94&P=ML These are kinda stubby and thats prob. your problem... RC4WD makes some NICE pinions 6-12 or 13 I think... here is a link: http://rc4wdstore.com/index.php?cPath=37 Note how long the gear is... Later, Jake

02-09-2007, 09:23 AM	#5
Offroader5 Picky Fab'r/Acetal Junky Join Date: Jul 2006 Location: Arizona Desert/AJ Posts: 3,073	That's more than likely your issue. Those "stubby" pinions will work fine if mounting the motor like stock right to the gearcase...but when you add the thickness of the adj. motor mount, the pinion needs to be longer to grab the spur gear.

02-09-2007, 11:00 AM	#6
CyberManiaK Pebble Pounder Join Date: Jan 2007 Location: So.Cal Posts: 146	Thank you guys yeah my pinions are Robinson Racing, and now looking at RC4WD I never notice that Robinson's are shorter :-(.. So you mean i can use these pinions with out the motor mounts? When i tried that way. the pinion do reach the spur, but is far from the spur PS. I don't want to hack my gearbox

02-09-2007, 12:11 PM	#7
DaViolentOne Rock Crawler Join Date: May 2006 Location: Surrey, BC, Canada Posts: 870	Could also look at the RC Guy stuff... I use his mounts and pinions with no issues... Well, not true... I don't have the clear dust covers to see my lash.. Yet...;)

02-09-2007, 12:33 PM	#9
STANG KILLA SS ~THE SCALE SHOP~ Join Date: Apr 2006 Location: KILLEEN TX Posts: 10,056	BS i use RR 9T pinions on ALL my clods. with both thundertech motor mounts, and CPE motor mounts. i have no issues. and all the teeth on the gear. i also have the same integy 55T on all of them. im not sure what your doing wrong...... you dont have the pinion on backwards do ya? (set screw furthest from motor)

02-09-2007, 01:08 PM	#10
CyberManiaK Pebble Pounder Join Date: Jan 2007 Location: So.Cal Posts: 146	Here are some pics. As you can see the pinion is in less than the middle of the gear. And i also have the pinion sittin on end of the shaft. That one is the 10T that i will put in the rear, and in front i will use 9T So?

02-09-2007, 01:10 PM	#11
DaViolentOne Rock Crawler Join Date: May 2006 Location: Surrey, BC, Canada Posts: 870	Yea... I'd look into other pinions then... RC4WD or RC Guy...

02-09-2007, 02:50 PM	#13
Offroader5 Picky Fab'r/Acetal Junky Join Date: Jul 2006 Location: Arizona Desert/AJ Posts: 3,073	With my 55t's, RC Guy mounts and pinions...I get full contact to the spur gear. Not only that, but the back end of the pinion is almost all the way on the motor shaft (I left about 1/16" between the pinion and the motor). From the pic, the mount looks really thick...but I don't know, people have said that they use the same setup If nothing else....spend a couple bucks and just get longer pinions.

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02-10-2007, 04:14 PM	#15
jeeper_rc Rock Stacker Join Date: May 2006 Location: Tenerife Posts: 51	the longer pinions are very noisy

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