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All Forums >> RC Cars, Buggies, Trucks, Tanks and more >> RC Monster Trucks >> Losi Monster Trucks >> broken diff?
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broken diff? - 4/19/2008 4:06:32 AM   
mmbc


 

Posts: 116
Joined: 11/14/2007
From: Monroe, MI, USA
Status: offline 		I was driving the other day at the track and my rear diff was working great. Then the next day i desided to drive at my house and the rear diff wasn't spinning at all but the front was. My friend and I (spikeman) took the whole rearend apart and check all the gears and they where all perfectlly fine. So we put it back together, and we drove it the next morning and I still had the same problem.
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RE: broken diff? - 4/19/2008 4:44:13 AM   
Sugafree



Posts: 919
Joined: 10/17/2006
From: ontario, ON, CANADA
Status: offline

(in reply to mmbc)
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RE: broken diff? - 4/19/2008 6:13:21 AM   
mmbc


 

Posts: 116
Joined: 11/14/2007
From: Monroe, MI, USA
Status: offline 		that might be it. i'll check it out in the morning.but i rememberd spikeman and i took the whole back end of my truck and everything was in perfect shap.

< Message edited by mmbc -- 4/19/2008 2:07:19 PM >

(in reply to Sugafree)
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RE: broken diff? - 4/20/2008 6:27:51 PM   
nicotram


 

Posts: 52
Joined: 1/9/2007
From: Denver, PA, USA
Status: offline 		did y our hex nuts loosen? check your wheel hexes

(in reply to mmbc)
       Post #: 4

RE: broken diff? - 4/21/2008 1:34:28 AM   
mmbc


 

Posts: 116
Joined: 11/14/2007
From: Monroe, MI, USA
Status: offline 		i've done that and i still cant figure it out.

(in reply to nicotram)
       Post #: 5

RE: broken diff? - 4/21/2008 2:57:46 AM   
nicotram


 

Posts: 52
Joined: 1/9/2007
From: Denver, PA, USA
Status: offline 		do any of your wheels spin freely without turning the dogbone?

(in reply to mmbc)
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RE: broken diff? - 5/2/2008 2:42:57 AM   
mmbc


 

Posts: 116
Joined: 11/14/2007
From: Monroe, MI, USA
Status: offline 		no.

(in reply to nicotram)
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RE: broken diff? - 5/2/2008 3:13:28 AM   
Grits


 

Posts: 345
Joined: 9/15/2006
From: , WV, USA
Status: offline 		Well, IF all the above is good about all that is left is inside the diff. The drive pins for the outdrive cups may be broken. By hand they catch enough to hold but under power they don't. The same may be true for the drive pins in the cvd or the wheel hex but you said they were good.

(in reply to mmbc)
       Post #: 8

RE: broken diff? - 5/2/2008 3:13:47 AM   
str8jailbird


 

Posts: 193
Joined: 2/23/2008
From: Belle Vernon, PA, USA
Status: online 		Just had the same problem with my LST2. I have the LRP in it and what happened was the pin that holds the drive shaft in the drive yoke was half sheared off. You couldn't tell just by looking because the broken pieces were still in the yoke. When power was apllied it slipped like grandma on the sidewalk after a snowstorm. Easy fix thow, the stock pins don't have much "flex" and they tend to snap instead of spring. I contacted Losi and they do not make any stronger ones. Someone on here recommended a clothes hanger cut to fit. PRESTO works like a champ and I now have a whole closet full of replacements (don't tell the ol lady!)

(in reply to mmbc)
       Post #: 9

RE: broken diff? - 5/3/2008 12:02:44 AM   
mmbc


 

Posts: 116
Joined: 11/14/2007
From: Monroe, MI, USA
Status: offline 		thanks a lot! i'll try that.

(in reply to str8jailbird)
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RE: broken diff? - 5/3/2008 3:01:17 AM   
Rockman



Posts: 629
Joined: 3/4/2004
From: Greensboro, NC, USA
Status: offline 		Have you looked into the diff cup to be sure it hasn't reamed out the inside of the cup?

_____________________________

Losi 8 w/ M2CRacing clutch shoes,rear hinge plate 3toe/3 squat. KingHeadz engine mount, rear chassis brace, Xtreme carbon

(in reply to mmbc)
       Post #: 11

RE: broken diff? - 5/10/2008 5:45:30 AM   
mmbc


 

Posts: 116
Joined: 11/14/2007
From: Monroe, MI, USA
Status: offline 		ya,as i said befor i took that whole back end of the truck apart and everything looked brand new. but i am really getting tired of trying to figure this out.it's just been killing me that i cant drive the dang thing!

(in reply to Rockman)
       Post #: 12

RE: broken diff? - 5/11/2008 8:10:52 PM   
jaron_denson


 

Posts: 135
Joined: 4/11/2006
From: Malibu, CA, USA
Status: offline 		I know that you probably inspected the diffs but did you take the gears off of the outdrives in the differentials. If you look under the two big flat gears in the diff there is two pins there.
And I know it has been mentioned but check all the grub screws on the transmission outdrives and on the inputs for the differentials. Take the grub screw out all the way and make sure it is on the flat part of the shaft.

(in reply to mmbc)
       Post #: 13

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