diff help

[danbinty]

hey guys need bit of help i have been offered an alloy dif for my savage x and i am wundering if you change the dif to alloy will i nedd to uprate the bevel gear so that it does not chew it up every 5 minz also will i have to buy to alloy difs or will it be ok to run just the 1 and 1 standard thnks dan

 

[f1n3sse]

I believe you were offered an aluminum diff cup? if so you will just put your existing gears from the plastic cups into the alum. cups. its a nice upgrade. I would recommend just buying the second aluminum diff cup they only cost about 20 bucks shipped from nova

 

[oregonmud]

Your fine to run one alloy and one plastic. Nothing else needs to be upgraded to do this mod. I would recommend the HPI alloy diff cups when you decide to get the second one, because they come with all the shims you need to make the diffs almost bulletproof.

 

[f1n3sse]

ew plastic diff cups....save yourself the headache and upgrade them both to aluminum

 

[HPI_Savage_RC]

Once you have the 6 internal diff gears housed in aluminum cups with steel pin/gear supports, and the ring/pinion gears shimmed correctly in X bulkless cases (Or GPM aluminum cases, but the one piece design of the X setup seems to be solid and eliminates most of the flex), the diffs are 99% bulletproof. No need to upgrade the bevel gears.

The remaining 1% comes into play when the 10x16mm diff side bearings finally decide to let go. I've only had it happen once (Using crappy bearings, and I was able to salvage the ring and pinion gears) in over 20 gallons of bashing, but I've heard tales from those who haven't been so lucky.

 

[Jeremy]

20 gallons come on

 

[oregonmud]

I'm up to about 18 on mine Jeremy. I even got a couple sets of spare gears when I first got my Savage because I figured I would need them. Not yet..... *knocks on wood*

 

[Crash]

I have made it for a year, about 5-6 gallons. then the front went out in a jump

It depends on your driving habits

If you wheelie and jump alot you will break a gear.

(my finger is on the ban button, don't argue with me)

JJ, lol

 

[oregonmud]

Ya, I don't like to jump my truck...... lol

 

[HPI_Savage_RC]

20 gallons come on

I lost 3 pinion gears during the first 2 gallons on the truck due to lack of shimming. The crappy diff bearings let go at around the 8 gallon mark. I replaced them with HPI bearings, shimmed the diff assembly such that it was solid in the X bulkhead/gearbox, then shimmed the pinion until no backlash could be felt between the gears, and haven't had a problem in a dozen gallons. I am just starting to feel a slight amount of slop developing in the X gearbox units, so I may have to add another shim in a few gallons.

I bash HARD, but the key is to avoid landing with the throttle on. Doing so will strip most any diff in most any vehicle in my experience.