Ouch, looking at those pics, you might have an issue somewhere else. If you have an issue it's going to be the motor mount bearing or the slipper adapter usually. I'd take the truck apart and inspect those parts before replacing anything else.
What Slash 4x4 model do you have and are those parts (motor mount & slipper adapter) still the original plastic parts?
Those two parts are common failure points from when the original Slash 4x4 came out in 2009.
Kingheadz makes a 7075 aluminum motor mount that comes with a bigger, sturdier bearing (10mm x 19mm x 5mm) and a 7075 aluminum slipper adapter to fix those common issues. These parts are basically must have upgrades to me for the Slash 4x4 if you drive even slightly aggressive.
They make the parts for both the old HCG and LCG chassis.
You can also run a full metal shielded bearing instead of a rubber sealed one: http://www.avidrc.com/product/8/metr...-bearings.html
On my Stampede 4x4 I use an aluminum TRP brand (no longer sold) motor mount, kingheadz slipper adapter, RRP xtra hard pinions and stock Traxxas spurs and haven't had any issues with it and I run 3s.
Robinson Pinions (I use the #87xx & #86xx pinions): http://www.robinsonracing.com/catalog/5mm_pinion.html
If you have an 1/8" (3.2mm) shaft motor, get the 5mm to 1/8" adapter, #1200.
| Cen Colossus GST-E |
| Stampede 4x4 | Stampede |
| Shelfers - Lunchbox & Blackfoot |
| Futaba 4PLS |