Gearing up the spider mod

[robmob]

After taking apart my Maxx for upgrading and putting it back together with the stock screws. I noticed that the self tappers that were in the plastic parts just didn't seem to tighten as well as they should have on the second go around. They just felt like if I tightend any more, I would strip the hole. I had a few hex head machine screws laying around that were the same size so I swapped a few out. They locked down in the same hole as tight as can be. When I got the SS kit and saw all the self tappers, the decision to go with the hex screw kit was easy. I swapped out every screw in the SS with screws from the kit I got. When I tear down the Maxx again to put in the FOC, I plan on swapping those screws as well. I hate phillips heads anyways. They always seem strip easily.

Here is the screws I used.

Here is a guy who also sells kits.

 

[cowboynv]

I think I have blown my first diff, the front. It makes for impressive, yet unexpected doughnuts when all of the power is only push'n the rear. I remember reading in a past post I believe Error and Sky speaking of Kyosho beveled gears and pins?

Is their a difference in Kyosho's Vs. HPI listed in above thread? Any differences in construction and overall quality?

Sorry if this may be a repeat question?

Thanks
C.

 

[BlueRidge1]

Bashed w/ the 3k diff lock fluid in the rear this weekend. Highly recommended. I climbed mounds of loose dirt that I wouldn't touch before.

Still decently streetable, too. I usually do a few high speed asphault passes before getting down to business in the dirt.

Cowboy...

As far as Kyosho vs HPI gears, I'd just stick with the HPI gears and do the 4 spider mod. The HPI gears are hardened, while others are not. Maybe the kyosho's are too, but I wouldn't take a chance.

 

[Error401]

Kyosho bevels and spiders are definately hardened. The nice thing about the Kyosho parts is that the gears are in seperate bags from the pins. The pins come 6 to a bag and are pre notched. Buggies run 4 spiders per diff, with 3 diffs as stock. The HPI replacement gears come with a pin, and it's not notched.

What I did when I did the spider mod for my Savage was to get 1 bag of Kyosho pins and 1 bag of gears.

Links to parts on towers:

Bevel Gears
Pins
Ofna diff lock silicone selection.

All this for about $30 shipped.

Use the original HPI spiders in one diff, Kyosho in the other, replace all the spider pins with the Kyosho ones, and use the diff oil of your choice.

 

[Puffnstuff]

I recently did this mod however I used axle grease instead of silicon oil and packed them unlike the light greasing from the factory. This mod is a must reguardless if you run grease or oil in them. I also used fuel tubing to cover the ends of the kyosho bevel shafts so they wouldn't be able to move around in the slots plus it offers some shock absorption to further reduce damage to the plastic cups.