Caster Angle vs. Contention?

[CarbonSteel]

Upgraded my lift today from 2.5" to 3.5" and I believe that my front driveshaft is turning when running down the road I think this is happening because there is a vibration that I have now that I did not before. The vibration feels exactly like it did when my front shaft was turning when the FAD shafts were bound up (long story involving Jeep Slop Shop). I am guessing it is not turning under power (meaning that it could be stopped), but just that way from the axle spinning (FAD not engaged).

I am running 6.3* of caster. Does anyone know if that is enough to cause contention with the angles between the axle and the transfer case?

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[Headbarcode]

Stock front shaft, or an aftermarket double cardan setup?

 

[CarbonSteel]

Stock front shaft, or an aftermarket double cardan setup?

Aftermarket double cardan (Metal Cloak).

 

[GATORB8]

I'm around 6-6.3 and I can run 70 in 4 auto (FAD locked) without vibration.

With the jeep running in 2wd (Park + Parking brake of course), you can slide under and should be able to free rotate the DS.

 

[AnnDee4444]

Aftermarket double cardan (Metal Cloak).

This one? https://metalcloak.com/jk-jl-front-driveshaft-auto-transmission.html

Only one joint is a double-cardan (which is a constant velocity type joint). In order to get this to be smooth the single-cardan joint would need to be almost in a straight line... which would make the caster completely wrong.

I'd get the FAD working again.

 

[CarbonSteel]

This one? https://metalcloak.com/jk-jl-front-driveshaft-auto-transmission.html

Only one joint is a double-cardan (which is a constant velocity type joint). In order to get this to be smooth the single-cardan joint would need to be almost in a straight line... which would make the caster completely wrong.

I'd get the FAD working again.

FAD is still working and I plan to keep it. I was just wondering what the maximum caster is and not experience vibration with the MC driveshaft that I have.

PS...Yep; that is the one. Does anyone make a double double cardan shaft (double cardan on each end)?

Just curious...

 

[AnnDee4444]

FAD is still working and I plan to keep it. I was just wondering what the maximum caster is and not experience vibration with the MC driveshaft that I have.

PS...Yep; that is the one. Does anyone make a double double cardan shaft (double cardan on each end)?

Just curious...

I haven't seen any with double-cardans (or any CV) on both ends.

 

[GATORB8]

FAD is still working and I plan to keep it. I was just wondering what the maximum caster is and not experience vibration with the MC driveshaft that I have.

PS...Yep; that is the one. Does anyone make a double double cardan shaft (double cardan on each end)?

Just curious...

I’m running a similar aftermarket 1310 setup without issue.

 

[Headbarcode]

Aftermarket double cardan (Metal Cloak).

I currently have the same Metalcloak 1310 front shaft and 6.5° of caster. No vibrations in 2h at any speed, and have never been in 4h above about 45mph to know if vibes would start at highway speeds.

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