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Discussion Starter · #1 ·
If you put on manual hubs on a cad axle (dana44)

Can you still use the cad unit or do you have to lock it in the on position and why



thanks




 

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Yes you can still use the cad. The only difference is that if you want 4x4 you either have to leave the hubs locked or lock them everytime you want 4x.
 

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For the "why", the CAD is responsible for sending the power down the drivetrain (the axleshafts) to the hub assy. Whatever is in the hub area ( auto hubs, full-time, or manual hubs) sends this power to the final destination( the tire). They will work independently of each other. That's why the CAD can be in 4wd position and the truck still in 2wd if the manual hubs are left free. A question for you is, what advantage do you expect with that setup? If you have a non-selectable locker in front, that would be one reason.
My spare change,
Mike
 

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AZ_RC_LUVER said:
A question for you is, what advantage do you expect with that setup? If you have a non-selectable locker in front, that would be one reason.
My spare change,
Mike
I have done this for the ability to have 2 low. A secondary reason was the warm fuzzy feeling I get when my hubs are unlocked and not spinning the axles and spiders all of the time.
 

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Discussion Starter · #5 ·
well i am putting in the axles in FINALLYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYY

and i put on the manual hubs on

they way i was thinking of it was when i "might need " 4wd i can lock the hubs and then i can turn the 4x4 on from inside if i really do need it. if not no biggie.

plus it will be nice not having the front diff always working when its not needed
 

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its cheaper to permanently lock the CAD and get some warn hubs that it is to buy that thing.

Duane
 

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Can someone explain something to me. When the truck has the CAD and is in 2-HI, what's spinning up front (the front driveshaft, gears, just the tires, or nothing?) Then when you switch to 4x4, the CAD unit connects the axle shafts to the gear? or something else happens? and the hubs are automatically locked, or always locked?

I'm just confused on what happening, spinning at what time, when something is actually spining becasue of the transfer case giving power, and what automatically happens. Also, OVERKILL, can you tell me what the advantages you have on this setup? I'm confused why you chose the manual hubs, and of course what you did to do that?

Thanks all!
 

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Okay, for starters, your hubs are always locked/engaged with your axles, so your axles are always spinning (even in 2h).
Now the axle shaft on the driver side is in two pieces. There is a slideing collar where the two shafts come together. When you are in 2h, the collar is not connecting the shafts, so on the driver side, only the outer axle (from the collar to the u-joint) is spinning.
On the passenger side, the axle goes all the way into the diff, but since the driver's side axle is dis-engaged, it only spins the spider gears (the ring gear/carrier are not spinning).
Now when you shift to 4wd, a vacuum switch in the t-case sends vacuum to the shift fork which slides the collar to connect both shafts together, now the whole ring gear/carrier is spinning, and of course, now your front driveline is spinning too.
Make sense?
I intend on doing a write-up for the FAQ section with a hi-tech facsimile (my old expert builder LEGO sets) ::) of a CAD axle, and I'll take pictures and hopefully it will be easy to understand.
 

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KThaxton said:
On the passenger side, the axle goes all the way into the diff, but since the driver's side axle is dis-engaged, it only spins the spider gears (the ring gear/carrier are not spinning).
Now when you shift to 4wd, a vacuum switch in the t-case sends vacuum to the shift fork which slides the collar to connect both shafts together, now the whole ring gear/carrier is spinning, and of course, now your front driveline is spinning too.
Okay so far I'm with you. now my questions are:

1) So the front driveshaft, the pinion gear and the ring gear don't move until the transfer case shifts to 4x4?

2) Explaing the spider gear to me, i don't really know what it is, where it is, and what it does (thought I'm assuming it's beside the ring gear?

3) I'm looking at the blowup in Haynes, there's a pic of something called the "case" beside the ring gear, what's that?

4) You also said ring gear/carrier. Is carrier the same thing, different thing, generic term, or what?

Thanks again, I'ts difficult to understand without a visual sometimes.
 

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Russcharger said:
Okay so far I'm with you. now my questions are:

1) So the front driveshaft, the pinion gear and the ring gear don't move until the transfer case shifts to 4x4?

2) Explaing the spider gear to me, i don't really know what it is, where it is, and what it does (thought I'm assuming it's beside the ring gear?

3) I'm looking at the blowup in Haynes, there's a pic of something called the "case" beside the ring gear, what's that?

4) You also said ring gear/carrier. Is carrier the same thing, different thing, generic term, or what?

Thanks again, I'ts difficult to understand without a visual sometimes.
1) Correct
2) They are the small bevel gears (4 total) that fit inside the carrier. They are what allows a differential to, well, differentiate!
I'll try to explain this the best I can with out photos. The carrier, is the housing (so to speak) which the ring gear is bolted to. The axles actually pass through the carrier and are splined to one spider gear on each side (one per axle). Those two spider (or side gears) are conntected by two more spider gears that are mounted 90 degrees from the spider/side gears. They are what allows one wheel to spin faster than the other while cornering.
Thats about as good as I can describe it without photo's.
3) I believe they are reffering to the carrier.
4) See #2, the ring gear is bolted to the carrier.
 

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KThaxton, Thanks so much, I think I'm getting it now. But I have one last one okay.So, passenger spider gear is moving, driver spider gear doesn't move unitl the two driver side axles are connected by the collar. Once that happends then both spders gear spin.

NOW, is this where the carrier comes in? Since both spiders are moving, the carrier (which has the ring gear bolted to it) transmits power from now spinning ring gear throught carrier, to spider gears, and to the tires? Is that correct? So, what makes the carrier move the passenger spider gear now, that it wasn't doing before since the passenger spider gear was moving and not affecting the carrier in 2_hi, but the carrier must now affect both spider gears in 4x4? In other words, is the carrier ever attached to either spider gear when in 2-Hi, cause it obviously is both in 4x4?

If you pass this test, I'm gonna have to give you an A on your report card, You deserve it!!!!!
 

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I'll have to just give you a partial answer for now.
The spider gears are all connected, so if one moves, they all move. When in 2wd, the spiders are just spinning inside the carrier. When you are in 4wd, the spiders aren't actually spinning (as long as you are driving in a straight line), they are acutally locking the shafts with the carrier and moving as one unit.
I am just about to leave work now, I'll try to get some pictures up tomorrow that will hopefully make this easier to understand.
 

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you are awesome! those pics an FAQ rock {cool}
 

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The BEST reason to put manual hubs on your CAD vehicles is they run quiet. A friend has a '84 4x4 Dodge PU with manual hubs and I noticed I didn't hear the wirrrring sound my RC has coming from the front end at highway speeds. He said manual hubs eliminates it. That is the main reason I would install them.
 

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ramchargertodd said:
The BEST reason to put manual hubs on your CAD vehicles is they run quiet. A friend has a '84 4x4 Dodge PU with manual hubs and I noticed I didn't hear the wirrrring sound my RC has coming from the front end at highway speeds. He said manual hubs eliminates it. That is the main reason I would install them.
If your friend has an 84, it doesn't have CAD. If yours has CAD, and has a "wirring sound" somthing must be wrong, I have two 86's and a 2000, all with CAD, and I have never heard a wirring sound.
 

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that whir or whine is his hubs locked. my CAD does that becuase its screwed up. it keeps the shafts locked so the Whir the shafts spinning the T-case D shaft
 

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good job Thaxton!
I noticed you only mentioned in 85-93 was the 1/2 tons. 3/4's had them too, at least most of them did with the 44HD front.

I also really dig the lego model. That's really slick!
 

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Donk said:
good job Thaxton!
I noticed you only mentioned in 85-93 was the 1/2 tons. 3/4's had them too, at least most of them did with the 44HD front.

I also really dig the lego model. That's really slick!
Thanks for the info. Was it the 85-93 1 tons that didn't have CAD? I know I've read this somewhere on the board. ooops!
 
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