Axial Capra gearing and overdrive cheat sheet

[GeorgeNada]

The title says it all.

Axle diff gears 8/30 = 3.75:1
Ring and pinion O.D. 8/27 = 3.38:1
Portal gears 12/23 = 1.92:1
TGH O.D. portal gears 15/20 = 1.33:1
Hot Racing O.D. Portal gears 13/22 = 1.69:1
Total axle ratio 7.2:1
TGH Portal overdriven axle ratio 5:1
H.R. Portal overdriven axle ratio 6.35:1
Ring and pinion overdriven axle ratio 6.48:1
Both (TGH) overdriven axle ratio 4.49:1
Both (H.R.) overdriven axle ratio 5.71:1

TGH portal OD percentage 36%
HR portal OD percentage 13%
Ring and pinion OD percentage 10.5%
Both (TGH) OD percentage 46%
Both (HR) OD percentage 23%
TGH OD front, ring and pinion OD rear total OD percentage 26%
HR OD front, ring and pinion OD rear total OD percentage 2%
TGH OD front HR OD rear total OD percentage 24%

Internal transmission gears 30/54 = 1.8:1
Ratio before pinion selection 12.96:1
Spur 34t pinion 17t = 2:1 total= 25.92:1
34/16= 2.13;1 = 27.6:1
34/15= 2.27 = 29.42:1
34/14 = 2.43:1 = 31.49:1
34/13= 2.62:1 = 33.96:1
34/12= 2.83:1 = 36.59:1
34/11 = 3.09:1 = 40.05:1
34/10 = 3.4:1 = 44.06:1
34/9= 3.78:1 = 48.99:1

Final drive ratios are based on stock axle gearing

[TheLetterJ]

Thanks for that, it's very handy actually having all the numbers in one place!

[GeorgeNada]

Yeah, I do this with all of my rigs, this was just the only one I didn't see a chart made for on here yet. Glad I could help!

[VelocityRC]

Just what I was looking for. Thank you for your time doing that.



Bill S.

[TheLetterJ]

I know it came out after you made your "cheat sheet" but it should be included on this page:

Vanquish AR44 Underdrive ring & pinion (VPS08331) is 33/8 or 4.125:1

[mtnwheeling]

Axial advertises a 7.39:1 axle ratio, but the above numbers look correct to me. I wonder how they are getting that lower gear ratio?

[TK421]

This is great stuff here!

Lou

[Burger_Enthusiast]

Thanks for putting this together. Subscribing for future reference.

[The Dark Knight]

Is it worth underdriving both axles to lower the ratio? Then overdrive the front portals?

[meatmonkey]

If your already running an 11 or 10 tooth pinion and still want more gear reduction it would be worthwhile to put the Vanquish UD gears in the back axle. I don't see the benefit to lowering the front ring/pinion ratio to then just increase it at the portal.

I started with a 10 tooth pinion, then put the UD ring/pinion in the back. Looking for a bit more OD percentage I eventually put in the mild SSD portal gears up front. Now it's in the sweet spot for my usage, mostly crawling atop stone walls.