Very doubtful ford would engineer 3:1 gearing possible with ONLY clutch pack for front axle drive, far more likley the 4x4 LOW Locking mechanism is also used in 4x4 HI
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That makes sense. Now I want a video showing that assembly at workI believe that portion is the planetary gear set that gives us 3:1, by engaging the two keys on either side, depending on where the motor pushes that sleeve back depends on if it engages BOTH then its 1:1, engage only 1/2 way and it likley reverts to 3:1...the blue shaft shows 3 lines at the wide point which would make sense, first is input side, inner center is for rear drive, and goes through the hollow outer (rearward) shaft for front engagement.
The motor inside the transfer case is operating two things at the same time , the cluch engagement, or the 2wd/4wd hi/ 4x4 low....or at one end of the motors extension it operates the ALL-wheel drive clutch assembly, then you move it all the way to the other side of the range and it likely engages 4x4 hi lock and then beyond that and engages four-wheel low loc... the video does not show the operation in this direction at all he only moves it the One direction. so we can all speculate on the unknown functionsThese bottom teeth attached to shield on the front drive chain gear.
Fit into the shell
Which does not key into the splined drive
The friction coated disks key into the center and steels key into the shell no mechanical connection to the front drive sprocket.
Interesting that Ford would highlight the use of having 4H/4L lock for the Raptor trims (and Tremor? These names are so dumb) and not mention it for the rest of the model lineup. With the @Snacktime response on my original post about the issue we were having to check the tcase fluid and not responding to my question on whether there was a true lock or not, it sent me down the rabbit hole where I learned about the use of clutch-only systems that were used on the normal F-150’s, but not Raptors.
article: https://www.sae.org/news/2020/03/ford-raptor-unique-front-driveline
Then going through this thread learned about the overheating issues on the non-locked cases. So it does seem that Ford has no problem with clutch only systems.
https://www.f150forum.com/f118/anyone-thought-adding-4a-xlt-366903/index4/
order a braptor tcase and pull it apart for us. It only costs as much as getting the brakes to not fall off of your $21k aerospace portals.
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Well if I had even taken a glance back at the assembly drawings.... for some reason I was thinking the front and rear output were offset from this shaft... I can be slow... no doubt about that...
You are absolutely right that that shaft HAS to decouple somewhere or you have no change in gearing to the rear.... The rear gear HAS to be happening upstream of the clutch pack. (which does place considerable more torque on the clutch pack). This becomes a problem with larger tires unless of course there is a clutch pack lock out. You defiantly have me questioning there is a possible lock out. I see where you are suggesting it is but still not understanding how it would function... I really want to crack one of these....
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@BigMeatsBronco that Everest transfer case looks interesting it has 2.72 gears and 4auto. Not sure what transmission they run in that platform are you trying to adapt in a 10r80?
yes 10r80
The Borg Warner 4494 from the Hummer H3 has the very similar gear set to our Broncos and is a four to one ratio in low I wouldn't be surprised if there was a way to adapt this somehow
Oooooooooooooo. That would be pretty awesome
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Must be the one I have in my truck..... the H3 Alpha was suppose to be almost identical to what I have... 09 Canyon with the 5.3 4x4.... It does NOT have the all time 4x4... only part time. maybe that was a difference????
maybe, the H3 had a planetary differential with 60/40 split, after and separated from the 4:1 gearset. Id love to try and imstall the 4:1 gears in a Bronco T Case
New clutch should be delivered to Suncoast today. It should take them about a week to get it stripped and recoated.
So I asked my buddy, and he's gonna let me borrow the 4:1 T-case from my old H3 and tear it apart and then I can tear down the Broncos case and try to see if there's any compatibility. Keep your fingers crossed!
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