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Valhalla

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I'm on my 4th rear driveshaft (2dr sas no additional lift). I purchased the spicer shaft about 400 miles ago because the Ford ones bust the tcase side cv boot. Not building confidence the spicer shaft will last any better. Seems like every time I go to Moab it comes back with the rubber tcase side boot cracked. I'm tired of going to the dealer.
did you keep the bad shafts?
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MattCO4x4

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I have one Ford shaft from the last boot failure. The rest the dealer took. I was keeping it just in case the Spicer one fails so I can put the Ford one back on then get a 5th replacement from the dealer. I didn't lift so mine keep getting replaced under warranty. I am just really tired of dropping off my Bronco for the same problem over and over.
 

indio22

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Question about how the rear driveshaft connects to the transfer case.

It appears that the t-case output shaft has a sort of "cup", and the round driveshaft end fits into it that cup? (Rather than a typical flange on my other vehicles.) Is that a correct assumption as indicated in the photo below?

Ford Bronco Spicer Driveshaft initial impression and long term review. 1706046199044
 
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popo_patty

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Question about how the rear driveshaft connects to the transfer case.

It appears that the t-case output shaft has a sort of "cup", and the round driveshaft end fits into it that cup? (Rather than a typical flange on my other vehicles.) Is that a correct assumption as indicated in the photo below?

Ford Bronco Spicer Driveshaft initial impression and long term review. 1706046199044
Yup, the end of that CV inserts slightly into the cup. That’s why I think they kept the CV end on the spicer as they would have to make a new output shaft to accept a yoke. But who knows.
 

87-Z28

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Some updated shaft angles. For near SAS geometry. 2 door in yellow and 4 door in red. Assumes 2 door shaft is 35” long (don’t have one to measure just scaled wheelbase). Dashed lines for increased angles from a 2” spacer lift or effective shock length increase. Redrilling lower mount up 2” does same lift. Springs and preload will just move equilibrium ride height angle. 0 point for pinion motion.

the 4 door caps out at full droop from 12-14 degrees. 2 door at 17-20 degrees. Plus or minus 1 degree or so. 17 degrees on unmodified SAS 2 door doesn’t seem that high. It’s hard to get the 4 door angles excessive.

A59FD82B-114C-413C-A784-B95834609B37.jpeg
 

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I want a dead shaft to take to Chattanooga driveline and have them make me a driveshaft... They are evil geniuses.
 

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I'm on my 4th rear driveshaft (2dr sas no additional lift). I purchased the spicer shaft about 400 miles ago because the Ford ones bust the tcase side cv boot. Not building confidence the spicer shaft will last any better. Seems like every time I go to Moab it comes back with the rubber tcase side boot cracked. I'm tired of going to the dealer.
I have this problem as well and 2 dealerships have already refused to warranty because I have 2" lift. I even took pics of the angles on the alignment rack w/the rack leveled and vehicles at curb hieght...lifted BL Sasquatch:
20231220_121850.jpg


Unlifted Badlands non-sasquatch:
20231220_122538.jpg
 

87-Z28

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I have this problem as well and 2 dealerships have already refused to warranty because I have 2" lift. I even took pics of the angles on the alignment rack w/the rack leveled and vehicles at curb hieght...lifted BL Sasquatch:
Ford Bronco Spicer Driveshaft initial impression and long term review. 20231220_122538


Unlifted Badlands non-sasquatch:
Ford Bronco Spicer Driveshaft initial impression and long term review. 20231220_122538
curious what are the details of the lift you are running in the rear?
 

Bmadda

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did you keep the bad shafts?
I still have my bad one my dealer refused to warranty. The second dealer offered to sell me a new one at cost, so I bought it and have it sitting in the box atm. I could send ya the old one after I change it? If your guys come up w/something tell them I want one too, and have them ship it to me? Was waiting till spring to change it, or till it started making noise
 

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I have this problem as well and 2 dealerships have already refused to warranty because I have 2" lift. I even took pics of the angles on the alignment rack w/the rack leveled and vehicles at curb hieght...lifted BL Sasquatch:
Ford Bronco Spicer Driveshaft initial impression and long term review. 20231220_122538


Unlifted Badlands non-sasquatch:
Ford Bronco Spicer Driveshaft initial impression and long term review. 20231220_122538
Interesting that your angle with a 2 inch lift is almost identical to my 2dr Sasquatch. No lift 14 degrees when I just measured sitting level in the garage.
 

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Interesting that your angle with a 2 inch lift is almost identical to my 2dr Sasquatch. No lift 14 degrees when I just measured sitting level in the garage.
Do you have any mods in the rear? Or are you completely 100% unmodified and stock.?
 

Bmadda

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Interesting that your angle with a 2 inch lift is almost identical to my 2dr Sasquatch. No lift 14 degrees when I just measured sitting level in the garage.
More interesting that you got yours warrantied, and the one service manager told me Ford would call back the part and that they would be able to see that it was installed on a lifted vehicle, and bounce the claim! I don't believe that, and I don't believe any reasonably sane person believes that either! Whatever...I just want a driveshaft that works!
 

MattCO4x4

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Do you have any mods in the rear? Or are you completely 100% unmodified and stock.?
No modifications to the suspension. Plenty of other mods that I would imagine just add weight - fulls skids, metal rear bumper... Stock 2dr Sasquatch Base in terms of suspension. Well swaybar disconnect but that doesn't effect the height.
 

MattCO4x4

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More interesting that you got yours warrantied, and the one service manager told me Ford would call back the part and that they would be able to see that it was installed on a lifted vehicle, and bounce the claim! I don't believe that, and I don't believe any reasonably sane person believes that either! Whatever...I just want a driveshaft that works!
Oh Ford service did question me about if it was modified. I had skids on the rear shock mounts and they asked about it because the suspension bolts had to be loosened. Showed marks that that kept bringing up. They even asked why I needed all those skid plates.
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