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Breaking rear drive shafts

Old 02-01-2009, 06:29 PM
  #1  
tiemac
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Default Breaking rear drive shafts

I have a 4 month old Savage X 4.6 rtr that keeps breaking rear drive shafts. I don't feel any binding in the drive train, cups look OK. Any ideas what could cause this. It never happens when bashing. Always when just running in the dirt.
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Old 02-01-2009, 06:43 PM
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Default RE: Breaking rear drive shafts

If you have your slipper clutch set to tight that might be the problem. I know having the slipper to tight was one of the issues I had with my E-Savage when it was breaking axles.
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Old 02-01-2009, 06:50 PM
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Default RE: Breaking rear drive shafts

That is a weak link on the savage. Upgrade it to a stronger shaft. Here is one that is pretty much indestructable.

Hot Bodies HBS61153 Mega Travel Center Rear Universal Drive Shaft
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Old 02-01-2009, 06:52 PM
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Default RE: Breaking rear drive shafts

Did not think of that. I will check it out.
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Old 02-01-2009, 07:08 PM
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Default RE: Breaking rear drive shafts

I run my slipper tighten all the way down and in over 10 gallons of running I only broke one rear dog bone. Is it the shaft going to the wheels or from the transmission to the rear diff?
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Old 02-01-2009, 07:11 PM
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Default RE: Breaking rear drive shafts

Transmission to the rear diff
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Old 02-01-2009, 07:55 PM
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Default RE: Breaking rear drive shafts

Never broke on of those.
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Old 02-01-2009, 08:10 PM
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Default RE: Breaking rear drive shafts

I have broke tons of rear shafts on both my savages prior to installing the HB shaft. Rear shafts will break right at the ball and the same with rear axles.
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Old 02-01-2009, 08:56 PM
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Default RE: Breaking rear drive shafts

I ran the HB shafts for a while but when I went to the HPI LCG chassis I could no longer run the rear one do to clearance problems with the engine plate. I still run the one on the front.
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Old 02-01-2009, 09:08 PM
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Default RE: Breaking rear drive shafts

I'm going to hobby shop tomorrow. I will check for HB.
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Old 02-01-2009, 09:37 PM
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Default RE: Breaking rear drive shafts

if you run in sand or loose dirt they tend to break
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Old 02-01-2009, 10:34 PM
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Default RE: Breaking rear drive shafts


ORIGINAL: ddre55555

if you run in sand or loose dirt they tend to break
It aint no fun if it wont run! It was hard pack sand. the other tree I broke in the dirt. My Savage is supposed to be tough. Maybe I should get some street tires and run it in the parking lot. LOL Sorry, venting some frustration.
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Old 02-02-2009, 08:47 AM
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Default RE: Breaking rear drive shafts

where do you get those drive shafts at, thanks
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Old 02-02-2009, 12:51 PM
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Default RE: Breaking rear drive shafts


ORIGINAL: ddre55555

if you run in sand or loose dirt they tend to break
I have to call BS on that one. I broke one rear halfshaft, it is the HB extended chassis version. It happened in a hill climb because I came down on the rear tires at WOT and the truck was falling backwards down the hill. If you can't run anything in sand or dirt, especially loose sand or dirt then its just a shelfqueen. Sounds like a savage hater throwing a punch in.
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Old 02-02-2009, 02:38 PM
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Default RE: Breaking rear drive shafts


ORIGINAL: brett65


ORIGINAL: ddre55555

if you run in sand or loose dirt they tend to break
I have to call BS on that one. I broke one rear halfshaft, it is the HB extended chassis version. It happened in a hill climb because I came down on the rear tires at WOT and the truck was falling backwards down the hill. If you can't run anything in sand or dirt, especially loose sand or dirt then its just a shelfqueen. Sounds like a savage hater throwing a punch in.

[sm=thumbup.gif]
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Old 02-02-2009, 02:55 PM
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Default RE: Breaking rear drive shafts


ORIGINAL: scarletboa


ORIGINAL: brett65


ORIGINAL: ddre55555

if you run in sand or loose dirt they tend to break
I have to call BS on that one. I broke one rear halfshaft, it is the HB extended chassis version. It happened in a hill climb because I came down on the rear tires at WOT and the truck was falling backwards down the hill. If you can't run anything in sand or dirt, especially loose sand or dirt then its just a shelfqueen. Sounds like a savage hater throwing a punch in.
[sm=thumbup.gif]

I checked his profile, he has a t-maxx. I guess he got his bulkheads confused with the Savages driveshafts.
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Old 02-02-2009, 03:37 PM
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Default RE: Breaking rear drive shafts

I run some trucks with some pretty big power and have broken about everything at least once, but none of the shafts coming from the transmission. Differential parts and transmission parts really regularly, but never the link between them. Wonder where I am going wrong...
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Old 02-02-2009, 04:27 PM
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Default RE: Breaking rear drive shafts


ORIGINAL: ddre55555

if you run in sand or loose dirt they tend to break
Not sure the reasoning why they would break in loose dirt or sand when there is very little resistance. I have broke a few on my f4.6 savage. Mostly from jumping but never just running around. I have broke 3 of the standard drive shafts. I then upgraded to the HB shaft and it snaps axles now. I have a FLM extended chassis savage running the lrp. That truck has twisted axles but not broke any. Use the HB drive shaft and stock black dog bones and you should be good. The chrome HD shafts from the X SS are junk and snap like twigs.
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Old 02-02-2009, 08:40 PM
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Default RE: Breaking rear drive shafts

I am curious to the nature of how you broke your rear shafts.

Can you post a pict aof a couple of them if you still hvae them? That would give me an idea of the sort of failure they are suffering.
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Old 02-02-2009, 08:53 PM
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Default RE: Breaking rear drive shafts

They break right at the ball. I will have to see if I have them but its been almost a year since I have changed to eh HB shafts. I only broke one of the stock black ones and 2 or 3 of teh chrome hd ones. The hd shafts are too brittle.
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Old 02-02-2009, 09:46 PM
  #21  
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Default RE: Breaking rear drive shafts

I remember the ball failures on the transverse drive shafts twisting them off, even before the rest of the dogbone suffered any torsinal failure. I think it had to do with the quality of the welds of the balls to the ends of the dogbone shafts .

I dont see why HPI does not simply pa a little more to do this properly.
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Old 02-02-2009, 11:47 PM
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Default RE: Breaking rear drive shafts

I would feel alot better if they broke after a 20' jump with a cartwheel landing. They always seen to break when i am being mellow. (rare). Dont have a picture but its right at the ball but in the shaft.
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