The slip sleeve is the power divider, when you engage it it allows power to travel into the front gear set, the rear is still being driven at the same time by the thru shaft. On a sqhd it does exactly what you said it unlocks.
In this link you can look at the slide collar #33. When you engage the power divider it slides forward and meshes with the thru shaft and the idler gear #22 which drives the pinion of the front rear, now unlock the power divider and the collar moves back on the shaft loosing contact with the gears. So now how would any power get to the front rear end? The SQHD is the only series like this, and thus the exception to the first post, in the SQHD's case when the divider is unlocked power can only be sent to either of the two wheels on the rear axle, not any of the four like the first post implied.
http://www.worldamerican.com/Catalogs/hd_diff_tran_pieces/SQHD_FORWARD.pdf
axle interlock
Discussion in 'Trucks [ Eighteen Wheelers ]' started by chrisut, Mar 19, 2013.
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This is the part that is not correct for the SQHD, and the only reason I brought them up. I just copy and pasted from the second post.
A common misconception is that the front differential receives no power unless the power divider is "engaged". This is completely false. All four wheel ends receive power regardless if the interaxle is locked or not. -
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That drawing doesn't show the power divider. Here's the original of that drawing: https://s3.amazonaws.com/helm-arm-lod/pb9424.pdf
Page 17 is the one you posted. Look at page 21. It's labeled SL/SQHD Interaxle differential assy. The locking sleeve you point out is the power divider lock. #26 on pg 21 drives the front rear from the rear side gear #15, and the thru shaft passes thru #26 to #14, the front side gear. The lockout sleeve merely locks the two shafts together, effectively locking the spider gears in place, and causing the whole divider to turn as a single assembly, thus eliminating any differential action.SmokinCAT Thanks this. -
Gotcha, I was unable to see the further most gear, even with the rear out and the front assembly unbolted. So the spiders are there to allow slip? And then the collar compacts the clutches and spiders to lock all together?
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Now while I got you here, could you possibly explain why my SQHP's in my KW use the housing any layout as a SQHD, but are listed in the with SQ100's.
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also, hammer i never did disagree with you on how a power divider works. i was just using the rt20-145 as example and to see what youd say.also, to prove your point further,i had a set of spicer n400 rears that when the spider cross broke in the power divider, the truck wouldnt even move. had to get it on a hook and go home.
as far as the old rockwell. i'm with cody....i thought the only way to actullay transfer power to that sq series was to lock the collar on the thrushaft to sent power to the big gear on the pinion though? not sayin ALL of them were that way.
but i do have a question though....when someone mentions a "full screw" what are they refering to? -
Yes, the spiders work just like they do in a rear. The difference being the outputs both exit in the same direction, and the carrier is driven along the same axis, rather than by a pinion.
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A lot of big companies do this to make the trucks "dummy proof". This way the rookies don't tear the power divider apart by locking it with spinning wheels. Instead of teaching them how and when to use it they just eliminate it. US Express did this to most of their trucks for a while. The lock was still their on the rear end. It just needed an air line and a switch for it to work.
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I raised the bed on my truck, and it looks like I do have the rear that has the interlock so I am in luck. thanks for the discussion
Hammer166 Thanks this.
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