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rhylsadar
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08.04.2009, 06:36 AM

hi

the "diff" problem exists since the savage turned up 2002 and was converted to brushless (or high power nitro engines). there are endless modifications of the savage diffs including the sliding blocks that were invented by advanced users long before hpi or traxxas put them into their factory diffs.
the usual reaction to diff damages was always to strenghten the diffs more and more. today e.g. cen diff mod or whatever mods are made to make the diffs stronger.

imo it is time to look at the problem from another perspective. more flexibility in the tranny especially the shafts would help. i am pretty sure good quality plastic shafts would help a lot to preserve damages on the diffs. in the case of a breakage replacing an outer shaft is much easier done and less time and money consuming than replacing the diffs. the tranny of the savage is just too "rigid" imho.

some nice high quality plastic shafts for the savage would be a very nice tuning part i would not hesitate to buy!

just my 2 cents

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rhylsadar


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JThiessen
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08.04.2009, 09:10 AM

Not a bad theory rhylsader. But....In my experieince with the Revo (I know, a different beast), both are suceptible to failure. At least with the Savage line, shafts are at least not a known breaking point.
I have yet to blow a diff on my Flux - 7 months of running it now. I've broke a few other parts (bumper mounts front and rear). Which brings up one beef with HPI - why in Gods name do they need to sell complete tree's of parts???? I gotta buy the entire bumper assy just to get the one piece I broke. Maybe in the long run it will be cheaper for me, but for right now, it seems like that will drive up my cost.


Losi 8T 1.0, Savage Flux - XL style, LST XXL, Muggy, 3.3 E-Revo Conversion and sitting outside 425hp, 831 Tq Dodge Ram Turbo Diesel. It SMOKES
   
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rhylsadar
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08.04.2009, 09:25 AM

yeah i also have quite extensive experience with maxxs and revos. and sure those shafts break from time to time. however i am quite surprised how good the standard diffs of an e revo e.g. hold up even under 6s abuse. the small trx diffs are imo on an absolute level weaker than the savage flux diffs. but they hold up pretty fine. of course the maxx/revo is weighing less than a savy nevertheless with some powerful BL setups the stress on the tranny is still there. i would think that the plastic shafts for the savage should be stronger than the trx shafts... maybe more like the new summit shafts or the like.

of course i am not sure if this would work out well as there are some many other factors. people who perform (senseless) standing backflips or jump and land with throttle/break still are able to break anything. last but not least an adequate slipper adjustment is important. but everything else equal i could easily imagine high quality plastic shafts would help to prevent diff damages and would produce a new intended breaking point in the case of too high peak impact.

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rhylsadar


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