dana 20 hop ups ????

broncomania · Aug 21, 2007

so, whats the big mods for a dana 20 ? im putting the atlas idea to later dates. or any of you mated an np205 to a c4 ? thanks.

Broncobowsher · Aug 21, 2007

Dana 20 mods
convert to twin stick
Varity of O'brien gears but for there cost might as well just spring for the Atlas.
Affordable (sort of?) gears are the 3.15 tera lows. I like mine.
Upgraded output shaft.
After that about all that is left is the gear gawker clear inspection cover.

broncomania · Aug 21, 2007

twin stick sounds good.
upgraded output shaft sounds good.
depending on cost.
3.15 tera lows ????? where can i research these ?
thanks.

70_Steve · Aug 21, 2007

broncomania said:
3.15 tera lows ????? where can i research these ?

Google!!

Just searched for "Teralow 3.15" and got a bunch of hits. Make sure you look at the ones for a Bronco. I like mine, too!

broncomania · Aug 21, 2007

70_Steve said:
Google!! Just searched for "Teralow 3.15" and got a bunch of hits. Make sure you look at the ones for a Bronco. I like mine, too!

yeah, i just did that. thanks. pretty expensive. by the time you add twin stick, shaft upgrade , etc. , $$$$$$$$$$$$$$
im thinking. ?:?

SaddleUp · Aug 21, 2007

broncomania said:
.... or any of you mated an np205 to a c4 ? thanks.

It's easier, costs less, and is stronger to use a C6 bolted to an NP205 than it would be to use the C4 bolted to one. The C4 and C6 have the same gear ratios so ther is no change other than a stronger tranny.

What do you plan to use it for? That could effect the choice of t-case and tranny.

TN1776 · Aug 21, 2007

I did a full rebuild on my D20 and plan to run it until either it breaks or I feel like springing for an Atlas or STaK... Regearing a somewhat weak box does not excite me.

telcolineman · Aug 21, 2007

Tera low gears are around $650.00, Check with PORC on pirate4x4.com. They have the best prices

70_Steve · Aug 21, 2007

broncomania said:
pretty expensive. by the time you add twin stick, shaft upgrade , etc. , $$$$$$$$$$$$$$
im thinking. ?:?

Call some of the places that don't list the price on the web site. I noticed a couple prices of $850 or so. I got mine from Trailquest ( http://www.trailquest.com/teralow/low20b.shtml ) for significantly less than that. You might also call Sams 4x4 Store ( http://www.sams4x4store.com/TeraFlexDriveTrain.htm )

TN1776 said:
IRegearing a somewhat weak box does not excite me.

Not sure why people think the Dana 20 is a weak box. It does have it's weaknesses, but can be upgraded. Yes , the output shaft is a weak spot, but it can be upgraded. I've only ever heard of one instance where someone cracked a Dana 20 case. The Teralow Gears are made by the same process as the stock Dana 20 gears, so no strength increase there, if you really need it. But talk to Jack O'Brien, of O'Briens 4 Wheels West, and he will explain how to make the Dana 20 virtually as strong as an Atlas. And with less of an investment and no fitment issues.

mr.n · Aug 21, 2007

I just talked to B.C. Broncos, they are out of upgrade rear shafts for a while...

What other shafts are there for upgrading?

Just this last weekend I broke my rear shaft, only 2nd time out with the rig...

SaddleUp · Aug 22, 2007

70_Steve said:
......
Not sure why people think the Dana 20 is a weak box. It does have it's weaknesses, but can be upgraded. Yes , the output shaft is a weak spot, but it can be upgraded. I've only ever heard of one instance where someone cracked a Dana 20 case. The Teralow Gears are made by the same process as the stock Dana 20 gears, so no strength increase there, if you really need it. But talk to Jack O'Brien, of O'Briens 4 Wheels West, and he will explain how to make the Dana 20 virtually as strong as an Atlas. And with less of an investment and no fitment issues.

Brian (Nvrstk) has busted one or two cases and I took this picture at SOB a couple of years ago plus Jack Covert mentioned someone else that cracked one open as well. (That's 3 that I know of)

broncomania · Aug 22, 2007

SaddleUp said:
What do you plan to use it for? That could effect the choice of t-case and tranny.

my c4 is brand new . and here is my rig.

SaddleUp · Aug 22, 2007

broncomania said:
my c4 is brand new . and here is my rig.

The NP205 would definately be stronger however it would cost you some low gearing. The NP205 is only 1.98:1 vs. the D20 at about 2.46:1. Since your C4 is new then I think I would just put the upgraded output shaft in it and add a twin stick. Tera low gears may be a plus as well but keep in mind you will loose some middle range gearing that the 2.46:1 stock gears give.

bludorbronc · Aug 22, 2007

Do you have the T (2.46) or J (2.34) shift, every little bit helps? And dont forget the doubler 203-20 for a great combo .

ugly74 · Aug 22, 2007

I've got a relative in michigan that used a stock Bronco D20 in a 600hp sand drag buggy for years. but his setup won't feel the same shock to the driveline as a crawler will either.

That's a gnarly Bronco you got there!

broncomania · Aug 22, 2007

bludorbronc said:
Do you have the T (2.46) or J (2.34) shift, every little bit helps? And dont forget the doubler 203-20 for a great combo .

?????? i couldnt tell you. ive never ran anything other than an np205 .
these d20's are new to me.

trailpsycho · Aug 22, 2007

Check out this thread. It was a little while back, but that was his normal price, I believe. You can get the HD output shaft from WH; its a 32 spline witha new yoke. Went in like butter. http://classicbroncos.com/forums/showthread.php?t=91898&highlight=terra+lows

I ended up doing most of the upgrades to the D20, Terra Lows, WH HD OS, JBFab Twin sticks even the Gear Gawker;D . I cant say the GG is an upgrade, but I will be able to see whats going on in there. I think the new WH billet saddle/cover will add some strength vs the 1/8 plate thats stock for the inspection cover...however. Most of the pics I have seen where the D20 cracks is right along this girdle. By adding a thicker cover, whether steel or a quality aluminum alloy, you keep the gears from splitting the case by having a better girdle. I may consider buying the WH one or having my milling machine buddy make some thicker steel ones at some point. For now, I am more concerned that it all stays together and oiled...once it starts to get beat on, we will consider a beefier cover. Anyway, the Terra Low kit comes with an almost complete D20 rebuild kit. I think the only thing it really lacked was the Timken bearings...which I believe can be bought via NAPA or a good parts house. In other words, you can save yourself almost $100 by not buying a rebuild kit when you get the Terra Low set. With the gear set, HD OS, Twin sticks and gear gawker, I think I have right around $1100 in my D20. Yes, if your lucky and patient you can find a used Atlas for around there...you will be waiting a long, long time...thought I had one but the dude was a flake%) ...some peoples word isnt worth their breath. But Im not bitter.

I cant wait to try it out. Good luck with your decision. The truck looks sweet.

broncomania · Aug 22, 2007

thanks trailpsycho. good info.

dana 20 hop ups ????

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