Clockable 2:1 Transfer Case

[tsm1mt]

Is there a shop offering a ~2:1 low range transfercase that'll hold up to a V8 and accomodate easily rotating the front output?

I've been racing with a Scout/Jeep Dana 20 with the Texas bolt pattern for years, but the driveshaft doesn't get along with the 727 too well at full bump and I'd like to rotate it down and away from the pan and also pick up a few more inches of droop while I'm at it.

The Texas pattern fouls things up.

I can convert to a round-6 pattern 23sp output shaft easily enough, which opens up using a Jeep Dana 300 (or any of the aluminum chain units) which I can clock down, but the 2.62 (or 2.72 for others) low range is "too low" for racing, while 2:1 seems "just right" a lot of the time (50mph is a reality with a 2:1 low range).

The other option I'm aware of is to run a NP205.. but there's a substantial weight penalty there!

They sell 4:1 gears for the 300.. but what I'd really like is a 2:1 gearset. ;)

Is there something out there that I'm not considering, short of a cut n' weld on my aluminum transfercase adapter (which I've thought of a bunch.. but I'm hesistant to do)

(For those of you running the EB Dana 20, you could refit Scout/Jeep 2:1 gears into the Bronco 'case)

[BajaBronco13]

Hey TSM,

Give Advance Adapters a call. They're in Northern California.

http://eshop.advanceadapters.com/commerce/ccc1009-scout.htm

I know they selling clocking rings for the Dana 300. Give them a buzz and let us know what happens.

Chris

[Yikes]

There is an International Harvester (http://www.pirate4x4.com/forum/forumdisplay.php?f=20)section at pirate that would probably be helpful.

[toddz69]

Is there a shop offering a ~2:1 low range transfercase that'll hold up to a V8 and accomodate easily rotating the front output?

I've been racing with a Scout/Jeep Dana 20 with the Texas bolt pattern for years, but the driveshaft doesn't get along with the 727 too well at full bump and I'd like to rotate it down and away from the pan and also pick up a few more inches of droop while I'm at it.

The Texas pattern fouls things up.

I can convert to a round-6 pattern 23sp output shaft easily enough, which opens up using a Jeep Dana 300 (or any of the aluminum chain units) which I can clock down, but the 2.62 (or 2.72 for others) low range is "too low" for racing, while 2:1 seems "just right" a lot of the time (50mph is a reality with a 2:1 low range).

The other option I'm aware of is to run a NP205.. but there's a substantial weight penalty there!

They sell 4:1 gears for the 300.. but what I'd really like is a 2:1 gearset. ;)

Is there something out there that I'm not considering, short of a cut n' weld on my aluminum transfercase adapter (which I've thought of a bunch.. but I'm hesistant to do)

(For those of you running the EB Dana 20, you could refit Scout/Jeep 2:1 gears into the Bronco 'case)

Not the cheapest option, but you could get a 2:1 Atlas. Very versatile in terms of clocking/rotation too.

Todd Z.

[tsm1mt]

Hey TSM,

Give Advance Adapters a call. They're in Northern California.
I know they selling clocking rings for the Dana 300. Give them a buzz and let us know what happens.


Clocking a Jeep 300 isn't a problem, but the 2.62:1 low range is less-than-desirable for me. It IS the lowest buck option, and one I can probably live with.

There is an International Harvester (http://www.pirate4x4.com/forum/forumdisplay.php?f=20)section at pirate that would probably be helpful.

I know those guys.. they'll look at me cross-eyed for wanting to LOWER my front output, but what the heck..

Not the cheapest option, but you could get a 2:1 Atlas. Very versatile in terms of clocking/rotation too.

Todd Z.

Here's the answer to my problem. I was aware of the 3, 4.3, 5, 6:1 and 4spd Atlas units, but the 2:1 never entered my mind.

Still, it's a $2200 solution.. which means I'll probably start with a Jeep 300 and see if the too-slow low-range becomes a deciding factor.

I'll gear the axles down a bit more to make up for "losing" low range (for that matter, a 1:1 clock-able case would be even better, and lighter..). I can't remember the last time I had the engine run out of rpm in 3rd/high anyhow..

Thanks for the ideas.

[Grimm]

For a racing application, i would think as little as you are in 4 lo, the 2.62 would do for the short time you would be in it. Not sure how much 4 lo is actually used in most races.

[retroblazer]

Unless you're pulling stuck vehicles, you don't need low range at all. Although we have the option, we choose not to have low range.

[tsm1mt]

Unless you're pulling stuck vehicles, you don't need low range at all. Although we have the option, we choose not to have low range.

Some of the courses I compete on are very "tight" and are designed to keep speeds down/penalize the 2wd trucks.

If a particular course has a top speed of 50mph, I run low-range and enjoy better acceleration compared to those that are stuck in high (or only have 2wd).

It's been an advantage at times, but one I'll manage without given the added expense of an Atlas, or weight of a 205 - until I run out of other things to focus my budget on.

The other scenario I was playing with was building a 9" front and doing the even-better thing of changing gearing for the course, but ultimately decided I'm too lazy to make that much work for myself between races.