Fawk doublers.....lets talk triplers.....

[hitech_hick]

Manual trans into an auto trans with manual valve body/slap shift, then into the t-case. Just think of the possibilities there!!!!

I've seen it done with a 700R4 behind an SM 4-speed, he later changed it over to dual 4-speeds.

I would be more worried about the the last T-case and the drive shafts than the axles with a tripler, although the axles would definitely be taxed as well.

4.0 M50(3.40) BW(2.48) BW(2.48) BW(2.48)
220 (FPT) 748 (FPT) 1855 (FPT) 4600 (FPT) 11409 (FPT)


I think that you can see where I am going with this.
The torque would be comparable that that of a 600 hp diesel in 4-low in granny gear; your truck would implode...



hick

 

[Muddycowboy]

hell might as well just go with a CVT transmission.

 

[Big Jim M]

I've seen it done with a 700R4 behind an SM 4-speed, he later changed it over to dual 4-speeds.

I would be more worried about the the last T-case and the drive shafts than the axles with a tripler, although the axles would definitely be taxed as well.

4.0 M50(3.40) BW(2.48) BW(2.48) BW(2.48)
220 (FPT) 748 (FPT) 1855 (FPT) 4600 (FPT) 11409 (FPT)


I think that you can see where I am going with this.
The torque would be comparable that that of a 600 hp diesel in 4-low in granny gear; your truck would implode...

hick

Wouldn't that..implosen.. only happen if the tires wouldn't slip? Although the tork would in principle be there it couldn't be used to the fullest unless there was no slippage between the vehicle and the surface it was resting on.
I cannot get a grip on how more tork would jeprodize the axels more when there should already be enough to twist em.
Big JIm

 

[Evan]

Wouldn't that..implosen.. only happen if the tires wouldn't slip? Although the tork would in principle be there it couldn't be used to the fullest unless there was no slippage between the vehicle and the surface it was resting on.
I cannot get a grip on how more tork would jeprodize the axels more when there should already be enough to twist em.
Big JIm

Yes, in fact lower gearing is much easier for the most part on a driveline as there is less impulse. The only exception is if your tires bind somehow. This is very unlikely to happen on the trail, as the tires will almost always break traction. The main danger is that the tire will catch on your body or frame, and then a 100+ final crawl and healthy engine will snap a shaft like a toothpick. This can be avoided by making sure your tires have appropriate clearance.

 

[CopyKat]

460 c.i. with c-6 auto,205 tcase run into two np435 4 speeds coupled together,a second np205. both 205s have been twin-sticked,and with this drivetrain combo the compound low is 3240:1.at idle one revolution of the tire takes 7minutes.

Believe it or not it's been done in a ranger before. And that is a 4.10 ratio with 44" tires.

 

[Sasquatch_Ryda]

Believe it or not it's been done in a ranger before. And that is a 4.10 ratio with 44" tires.

Yup, i've seen that truck in person too, friggin nuts.

 

[metalmacguyver]

Believe it or not it's been done in a ranger before. And that is a 4.10 ratio with 44" tires.

Where the Fawk! can i find more about this beast?

 

[Sasquatch_Ryda]

http://www.trailmonster.com/MonsterRides/DisplayMonsterRide.aspx?ID=60

 

[88ranger2.95sp]

huh?

If I'm not mistaken, the owner's running a Dana 50. Isn't that a TTB axle? I only see solid axle...

Rob

 

[metalmacguyver]

The Dana 50 came in solid axle form.

 

[CopyKat]

If I'm not mistaken, the owner's running a Dana 50. Isn't that a TTB axle? I only see solid axle...

Rob

He welded it together.

 

[KELLY88]

http://www.trailmonster.com/MonsterRides/DisplayMonsterRide.aspx?ID=60

That is absolutely insane. Haha, "One full tire revolution takes 7 minutes idle" Now that's crawl!

 

[Sasquatch_Ryda]

If I'm not mistaken, the owner's running a Dana 50. Isn't that a TTB axle? I only see solid axle...

Rob

Its a d50 TTB out of an f250 welded into a 'solid' axle with a transverse leaf spring and a 1 link

 

[JohnnyU]

In all honesty, it would be "neat" to do something like this, however it would be dumb. From a longevity and reliability standpoint, you never want your peak torque transfered by a shaft. We design shafts to be high speed/low torque components. This same thing can be achieved in a much more compact and likely lighter weight form by the use of planetary final drives, portals or other axles with the final reduction done RIGHT at the wheel.


SEE: Unimog, Volvo, and Dana Planetary Axles.

 

[Evan]

In all honesty, it would be "neat" to do something like this, however it would be dumb. From a longevity and reliability standpoint, you never want your peak torque transfered by a shaft. We design shafts to be high speed/low torque components. This same thing can be achieved in a much more compact and likely lighter weight form by the use of planetary final drives, portals or other axles with the final reduction done RIGHT at the wheel.


SEE: Unimog, Volvo, and Dana Planetary Axles.

Can you imagine hearing an input bearing go out? You'd have to take each case and transmission out to see if it was the culprit....LOL.