What transfer case gear ratio to run?

[biggun68]

rockwell axles 6.72. Th400 Trans 2.48 low. 43" tires. Looking into SCS drop box and wondering what gear ratio to start with. Rock bouncer.

 

[paradisePWoffrd]

how much HP? I would like say something in the 3.0 range with a healthy motor or in the 4-5 range with something smaller.

 

[XJsavage]

As high as 2:1 if you have 400+ hp

 

[Stuntman Autoworks]

Good thing about the SCS is it would be pretty easy and relatively cheap to swap ratios if you ended up needing something different. With the 6.72 in the rockwells i'd say something in the 2.X range.

 

[Mac5005]

Probably 2.3-2.5 range to get a decent crawl ratio and really get wheel speed up in 2nd gear.

 

[StretchASU]

Since all LS cam and a tune rock bouncers make 600+ to the wheel, a 2-3xcase should be plenty.

 

[biggun68]

1200-1400hp. I was leaning towards 2.0

 

[jeepinmatt]

View attachment 283747 1200-1400hp. I was leaning towards 2.0

You could have just started a thread that said "Hai u guis I have over 1200hp!" instead of pretending to ask for T-case ratio advice

 

[biggun68]

I was tring to figure what would be best to have some low gear and have enough high gear wheel speed.

 

[drkelly]

I was tring to figure what would be best to have some low gear and have enough high gear wheel speed.

Atlas 4spd with 2:1, 2.72:1, and 5.44:1.

 

[a_kelley]

I was tring to figure what would be best to hold up to the power and have some low gear and have enough high gear wheel speed.

Fify

 

[biggun68]

Atlas 4spd with 2:1, 2.72:1, and 5.44:1.

I've seen some of the atlas not hold the power?

 

[Van-go]

I've seen some of the atlas not hold the power?

Yeah, the 4 speeds may end up breaking the intermediate shaft.
I like the titan box from NWF with a ford or Chevy 205.
One of the strongest set ups out there and you have 1:1 2:1 2.72:1 and 5.33:1

With that much power, and Rockwells, you really only need 1:1 for hill killing. And
a built 205 may be fine for crawling.

 

[Mac5005]

Thinking of that much power, I’d run scs for sure and stay around 2:1.

Hope you are getting a custom converter built just for this?

If not call PTC, give them all your details including gearing, tire size, cam specs, weight etc. they will build a converter for your application. Install and be happy.

Best thing we have done behind the 502.... it’s light years better than off the shelf rated “stall” converters.

 

[XJsavage]

Yeah, the 4 speeds may end up breaking the intermediate shaft.
I like the titan box from NWF with a ford or Chevy 205.
One of the strongest set ups out there and you have 1:1 2:1 2.72:1 and 5.33:1

With that much power, and Rockwells, you really only need 1:1 for hill killing. And
a built 205 may be fine for crawling.

I drool over the black boxes. Definitely get a Ford 205 over a Chevy. Considering a 205F already has 32 spline outputs f/r, fixed yokes and can be had for $200 or less, it beats a 205C any day.