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All Forums >> RC Cars, Buggies, Trucks, Tanks and more >> RC Monster Trucks >> HPI Monster Truck Forum >> hpi hellfire differentials
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hpi hellfire differentials - 5/12/2008 2:07:37 AM   
3130pembroke


 

Posts: 3
Joined: 5/12/2008
From: , FL, USA
Status: offline 		ANYONE GRINDING UP FRONT RING AND PINIONS ON THEIR FRONT DIFFERENTIALS?
DRIVING ME CRAZY..........i CHANGED BOTH GEARS AND REPLACED SILICONE TWICE
       Post #: 1

RE: hpi hellfire differentials - 5/12/2008 1:23:12 PM   
RCCanuck


 

Posts: 2076
Joined: 3/15/2006
From: Brantford, ON, CANADA
Status: offline 		are they shimmed?

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2.5 Tmaxx// T Maxx-Picco.26//2.5 Race Spec maxx//Savage SS//Brushless Micro T's//Micro DT ...all controlled by Spektrum

(in reply to 3130pembroke)
       Post #: 2

RE: hpi hellfire differentials - 5/12/2008 8:16:06 PM   
talk to me borris


 

Posts: 47
Joined: 11/21/2007
From: Cardiff, UNITED KINGDOM
Status: offline 		i kept on shredding my rear diff gears so i just locked it

(in reply to RCCanuck)
       Post #: 3

RE: hpi hellfire differentials - 5/18/2008 1:32:37 AM   
3130pembroke


 

Posts: 3
Joined: 5/12/2008
From: , FL, USA
Status: offline 		yes shimmed- It seems ok when i put it together but after a few laps starts to slip. I have to assume the cups are worn since i have replaced other stuff. I like this truck but i fix this beast more than i run it

(in reply to talk to me borris)
       Post #: 4

RE: hpi hellfire differentials - 5/18/2008 1:41:58 AM   
BudBud


 

Posts: 2224
Joined: 12/21/2006
From: Salina, KS, USA
Status: offline 		All three bearing sets good? A bad bearing is normally the cause, once they get out of alignment, they self destruct quickly. BB

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Doing my best to fill a 55 gallon drum with broken or worn out R/C parts.... 8^)

(in reply to 3130pembroke)
       Post #: 5

RE: hpi hellfire differentials - 5/18/2008 2:12:19 AM   
burnchassis3



Posts: 966
Joined: 2/28/2006
From: Cincinnati, OH, USA
Status: offline 		I second the bearings...Thats usually the cause of stripping R&Ps.
OR
worn out plastic diff cases...If you have plastic replace them.
CS


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Gravediggeracing,Hawk900,Thunderbirdjunkie,BUDBUD

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       Post #: 6

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