Lets Talk Differentials

[IZwack]

My stock '01 xls has the 3:73 LS and stock 29x9.5's... When I upgrade to 32's (plus TT/BL/Etc.) I want to re-gear to 4:10 front and rear...:exp:

Good idea??

Search, its been covered quite a bit.

 

[askingxforxit]

Search, its been covered quite a bit.

sweet! on the hunt i go!!:roll:

 

[IZwack]

Weep from above the angels doeseth -- which means its pretty wet outside and I couldn't get a good picture/measurement w/o laying down on the driveway (with the naked worms!

).

But the 14b's vertical cross section is about twelve and a half inches and the centerline of the axle is about six and a half inches from the bottom of the differential

 

[94 Crawler]

THanks IZ that is perfect. I just remeasured the 80 It is around 6.75" from the axle center to the bottom of the axle. I'm concidering shaving it and building or reworking the stock cover. This should be able to be done with little or no funds so I can work it untill i get all of the peaces purchased. Also I think all I can narrow it is to 66" wms to wms because of axle tube taper. I will get some pics up this weakend and some of the carnage. The guy that owned it said the tire ran off in a ditch and the spindle snapped. I'm guessing due to the locker engaging and the wheel stopping instantly at that rate of speed maybe. Posibly more due to a flawed spindle. Again thanks for the info.

 

[94 Crawler]

Dana 80

Here are some pics d44 vs d80.[/ATTACH][/ATTACH][/ATTACH]

 

[94 Crawler]

Also carnage from wreck.

 

[94 Crawler]

Here's what I'm currently thinking of building for axles.

Front:
Hybrid 609 Thats a 9" Ford with 60 outers.
True Hi9 center with arb locker and 4.56-5.13ish gears
Spidertrax housing
Dedenbear inner and outter c's
alloy axles (still recearching)
3/4 ton spindles, rotors, calipers etc...
high steer
hydro assist
long arm style suspension like the jeep design only custom
coil overs (King fo tha bling)

rear: (have any of you all seen this)
nodular center with 35spline arb
alloy axles
custom, shaved for clearence, renforced, stock housing with 60 spindles and hubs
disk breaks

this faze is probably 2 years off I'm collecting ideas and info. Any imput or coments would be apreciated. Oh I have decided that the 80 while beafy is not going to be worth the trade, super strong + $$$ to build + clearence issues vs 9" limit less parts avalibility already stronger than a 60 stock (gears that is) better clearence. I think some 35 spline floating axles would make it bullet proof.

 

[JMan689]

Rocks or full tons.... go big or go home

 

[IZwack]

Rocks or full tons.... go big or go home

Over the 609s? No way.

$0.02:
This reminds me of SPEED channel's Monster Jam <-- pretty much useless. A modern trophy truck can crush these monster trucks on 95% of the stuff they do, from the free style sessions to racing. And they keep breaking Rockwells right in half because they are waay to heavy. IMO, monster trucks are still under the mindset that "bigger is better", when clearly, its the lightest and most nimble that comes out at the top. We already know that a trussed Ford-9" is the standard for trophy trucks (and the likes) and they able to take huge air in the desert. There is no need for 50 something inches of tires because there is always a ramp built before the pile of cars. A trophy truck design pushing maybe 39" would probably cream these trophy trucks in their game. The 50 something inch of tires is extra leverage unnecessary for the course. In addition, the tires and the axle itself is unsprung weight that you have no control over, which means the shocks and suspension cant soak up this dead weight -- which leads to breakage. Look at the modern monster truck's links -- they are almost horizontal. Why dont they just admit the fact that they can do away with the old "monster" mindset and start running lighter and shorter vehicles?

 

[JMan689]

Over the 609s? No way.

$0.02:
This reminds me of SPEED channel's Monster Jam <-- pretty much useless. A modern trophy truck can crush these monster trucks on 95% of the stuff they do, from the free style sessions to racing. And they keep breaking Rockwells right in half because they are waay to heavy. IMO, monster trucks are still under the mindset that "bigger is better", when clearly, its the lightest and most nimble that comes out at the top. We already know that a trussed Ford-9" is the standard for trophy trucks (and the likes) and they able to take huge air in the desert. There is no need for 50 something inches of tires because there is always a ramp built before the pile of cars. A trophy truck design pushing maybe 39" would probably cream these trophy trucks in their game. The 50 something inch of tires is extra leverage unnecessary for the course. In addition, the tires and the axle itself is unsprung weight that you have no control over, which means the shocks and suspension cant soak up this dead weight -- which leads to breakage. Look at the modern monster truck's links -- they are almost horizontal. Why dont they just admit the fact that they can do away with the old "monster" mindset and start running lighter and shorter vehicles?

Because they are cool being that big. But how often you would break a rockwell for "recreational" offroading.

 

[IZwack]

how often you would break a rockwell for "recreational" offroading.

Well we already discussed the downsides of Rockwells in Burn's thread. Yeah they're not going to break but who wants to deal with a heavy Rockwell with odd parts (bolt pattern, etc..) when you can run a 60 or a 609? And the top-loader design begs for a really tall rig.

 

[JMan689]

Yeah they're not going to break but who wants to deal with a heavy Rockwell

True true. You ever play with one? Ring gear alone is like 50 lbs.

 

[IZwack]

True true. You ever play with one? Ring gear alone is like 50 lbs.

Nope, never had the need to have one around. I've seen a few rigs with them though. They were the hype a few years ago until people realized what the crap. Now its harder and harder to get rid of them - a HP D60 fetches more than a steering Rockwell.

 

[JMan689]

Nope, never had the need to have one around. I've seen a few rigs with them though. They were the hype a few years ago until people realized what the crap. Now its harder and harder to get rid of them - a HP D60 fetches more than a steering Rockwell.

I thought they were still pretty sought after.

 

[94 Crawler]

Thanx guys

JMan689
My truck is going to stay as streetable as possible, I know i'm going overkill for that. I compaired some prices and unless i get a 78-79 hp 60 at a steal this ia probably my best option for a strong axle out front. A dana 44 offers nothing except for solid axle and easier(to achieve) articulation over the ttb 35. Maby more dependable ? With as many axles popping in 44's I figure skip it and go to the bigger one. Plus I already like the 9" anyway my Chevy has one under it narrowed with a detroit and it is 2wd and lowered. (Altho rocks would be awsome)

IZ
Good points as always. Have you seen anyone do a full floating 9" rear?

 

[IZwack]

IZ
Good points as always. Have you seen anyone do a full floating 9" rear?

Not for off road but have seen a few full floater 9" (for drag racing?) at the machine shop I go to for bead blasting and hot tanking.

 

[Burns]

Thanx guys

Have you seen anyone do a full floating 9" rear?

I wish i could remember where i seen this on the net. There is a good page somewhere on how to make your 9" a full floating axle. I just cant remember where it was.

If i was you i would do the 609 axle. For what your trying to build i would stay away from the rocks. Im still thinking this winter the lime will get rocks or 60s. We will see

 

[94 Crawler]

Burns
I have searched for info, maby just not in the right place. I do Intend to hit some trails take it slow pick my lines (drive around/ ride with someone else). I dont have anything to prove just want to go where most cars on the road can't. So far as strength, the 9" is stronger than the dana 60 gear wise. Go to Hi9's website they have the gearsets side by side. What makes the 9" weaker is the stock 28 or 31 spline carrier, and the axles neck down. arb has a 35 spline locker. Shure I'll need a aftermarket case but a nodular case is cheep compaired to what i was going to spend on that dana 80. Also the same applies to the front the true Hi9 is custom high pinion 9" the gears are special made by richmond. Throw in some alloy axles and instant axle stronger and lighter than a D60. This all has a price tag I know but I will have the satisfaction that I built something different. Something to my likeing etc... I have had the truck since 96' and would like to keep it but it aint no mall crawler. However I do plan to build a rear engine buggy laiter for the tough trails. I do apperciate your concern and if some thing happens it happens I'll start over.

Thanks IZ I will keep searching

Or were you refering to rockwells (rocks) Burns

 

[JMan689]

Thanx guys

JMan689
My truck is going to stay as streetable as possible, I know i'm going overkill for that. I compaired some prices and unless i get a 78-79 hp 60 at a steal this ia probably my best option for a strong axle out front. A dana 44 offers nothing except for solid axle and easier(to achieve) articulation over the ttb 35. Maby more dependable ? With as many axles popping in 44's I figure skip it and go to the bigger one. Plus I already like the 9" anyway my Chevy has one under it narrowed with a detroit and it is 2wd and lowered. (Altho rocks would be awsome)

So you plan on throwing 60s under it? In all retrospect not many guys have SAS'd rigs that they drive on the street. Burns is the only one i know of.

 

[IZwack]

Thats because FireZapper has self-control -- unlike the rest of us who have no shame

But Spas also has a street-driven SAS-ed Explorer. Froader's also sees a bit of street time every now and then.