Hey guys. I have been working on an inexpensive rear axle solution for awhile now. While going through my part box trying to come up with some ideas, I found some parts that looked like they would work! Although it's not all steel like I had wanted, it should still be a nice improvement.
This mod will increase strength at all the common breaking points. It will also increase the stub axle diameter to 6mm like the tekno kit.
Top one is the new shaft, bottom is stock. Every part of the new shaft is bigger than the stock one. The new shaft is a t-maxx 2.5 half shaft. You will need to cut the male and female splined parts down to around 1.35" inches each.
I had some 6x12x4 bearing out of some extra revo diffs. You can buy 6x11x4mm bearings from boca bearings for about $14 for a set of 4. That would save you the trouble of boring the bearing holes to 12mm.
Side thought: I am running an RPM e-rustler rear carrier on one side and the 6x12x4 bearing popped in quite nice. Stock slash carrier, not so much.
You will need to drill out your stock 12mm hex to 6mm ID to fit the new axle.
Ready for the hex! On the stock carrier, it doesn't need shimmed. On the RPM e-rustler carrier, it would need a couple shims. This could change depending on how your bearings fit in the carrier after drilling it out. For this reason, I would get some shims/washer just incase!
Ready to roll!
This looks like it should really hold up much better than stock. I will do some 6s runs with my 2200kv to really abuse them and see how well they do!
4951x - (2) tmaxx half shafts - $7.69
4928x - (2) diff output yokes- $4.79
4953x - (2) stub axles - $7.69
DTXC9767 - 6mm shims (10 pack) - $1.79 x 2
5147x - 5mm flanged lock nuts - $3,39
5117 - 6x12x4mm ball bearings - $3.89 x 2 (These require drilling/sanding of carriers. Buy 6x11x4mm for direct fit)
These are the prices at Tower. You can probably find them cheaper. For example, I just bought a full set of 4 half shafts (the first 3 items on the list) for $16 shipped.
I think these should work for the front with a few more mods. I will try to get them to work shortly.
Thanks for looking!