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  • 4 weeks later...
Posted

Hi all,

I came across this transfer case on MOC pages, I was wondering how it works, can someone explain it ? What is hte benefit of it ?

I'm not sure but it seems to connect the front and rear axle drives together, creating a sort of a centrer diff-lock.

Posted

I'm not sure but it seems to connect the front and rear axle drives together, creating a sort of a centrer diff-lock.

So I guess if one side gets stuck it will transfer power to the other side. gonna give this a shot later.

Posted (edited)

So I guess if one side gets stuck it will transfer power to the other side. gonna give this a shot later.

Stucked axle cant help other. Because it stuck:) but if one wheel rotates free without contacting with ground, and other stops - Diff transfer power to another axle

Edited by rm8
Posted

A diff lock or limited slip diff would be better, you could place to small circle of thin card under the center cog of the diff to create resistance.

Gonna try that :tongue:

Posted (edited)

good idea you could also (and i've seen it done elsewhere) run one motor for the drive and 2 servos for the steering then you can control the crawl, FWS, RWS, 4WS etc...

Hi all,

I came across this transfer case on MOC pages, I was wondering how it works, can someone explain it ? What is hte benefit of it ?

1350220299m_SPLASH.jpg

Edited by Rockbrick
Posted

My guess is that both motors always power both axles, .

Besides that both diffs are on the same side so one axle needs an additional cog so both drive in the same direction, hence the indirect connection between both.

Posted

My guess is that both motors always power both axles, .

Besides that both diffs are on the same side so one axle needs an additional cog so both drive in the same direction, hence the indirect connection between both.

If you re-orient the diff case on one side I bet you could use a direct connection right ?

Posted

If you re-orient the diff case on one side I bet you could use a direct connection right ?

Wouldn't that result in the axles turning in opposite directions?

Posted

Wouldn't that result in the axles turning in opposite directions?

Nope. There are two small 8T gears in the middle, which make rotation for both front and back axles in required directions. Not sure how strong this solution is.

Posted (edited)

I searched this thread for some advantages choosing Power Puller wheels. They seem to make it better at climbing obstacles, and giving the Boss bigger ground clearance and a lower center of gravity. I wonder if the L motors will be too much stressed, though....

Edited by Lost_In_Noise
Posted (edited)

I searched this thread for some advantages choosing Power Puller wheels. They seem to make it better at climbing obstacles, and giving the Boss bigger ground clearance. I wonder if the L motors will be too much stressed, though....

Done)

2013_%25252525206_21_%25252525203_20-003.jpg

2013_%25252525206_21_%25252525203_20-007.jpg

Edited by rm8
Posted (edited)

I've just done the same myself, what I meant what is there any difference in performance when using these tires. When I tried it I couldn't see any real difference, besides PP wheels being better at moving through a blanket. Uphill climbing was about the same for both alternatives...

And of course it looks a LOT better:

tn_dscn8319.jpg

That sad 8466 in the back..... Its glory days are over.

Edited by Lost_In_Noise
Posted

I've just done the same myself, what I meant what is there any difference in performance when using these tires. When I tried it I couldn't see any real difference, besides PP wheels being better at moving through a blanket. Uphill climbing was about the same for both alternatives...

I feel that it slowed thecrawler down a bit with a minimal increase in climbing ability

  • 2 months later...
Posted

I am almost done with my air suspension and gear chang mechanism. Details will follow soon, but it is based on fr3dpivo' s YouTube video for the 9398.

Posted

I feel that it slowed thecrawler down a bit with a minimal increase in climbing ability

In theory the oposite should happen because of the bigger diameter of the PP tires...

Posted

But those weight a ton.

yup. I see no advantage to them. they have to be mounted backwards because of they offset and I actually prefer the look of the original wheels to them.

  • 1 month later...
Posted (edited)

Here's a video of my 41999 with an adjustable suspension and gear change using an autovalve- MOD inspired by fr3dpivo's video on youtube and the auto valve is Zblj's design.

th_crawler_zps77da6f98.jpg

Edited by kevman

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