Ok I'm hoping somebody can help me with this, my front driveshaft will not spin freely with the transfer case in 2wd, and the tranny (auto) in neutral. It is the same with the t-case in neutral. The part time light comes on when i shift into 4 hi and 4 lo, and goes off in 2wd and neutral. I'm trying to diagnose some front end wobble and I think that the driveshaft spinning might be causing it. I'm also not real sure about how the vaccum egagement for the hubs work, could my hubs be locked and causing my front driveshaft to spin? I really need some help on this. Thanks in advance.
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front ds always spins
- Thread starter AZ XJ
- Start date
R
rangerjoe2001
Guest
its because the front axle doesnt have hubs!
flexjay87
NAXJA Forum User
- Location
- iowa city iowa
you talkin about the shaft movin freely while you are drivin, or just tryin to spin it while setting still, just to check it? while driving shaft should turn unless something is broke i would guess. setting still you will have to lift one tire to spin shaft. at least mines that way. hp d-30, no vacuum crap etc. vibes could be, bearings, tires, shaft out of balance(or phase) bad suspension, etc., etc. remove the shaft and see what happens. i trashed my carrier bearings twice in one year and it vibrated like crazy.
kubtastic
NAXJA Forum User
- Location
- Tacoma, WA
this is just a crazy idea, but try to judge how fast the wobble is. If it's the driveshaft, it'll be vibrating 3-4 times faster than your wheel rpm. If it's happening with every wheel turn, it should still be pretty fast. Slower wobbles are in the steering.
At 55 mph, you're going some... 80 ft/s, and assuming... 8ft/revolution (tire circumference), that's 10x per second on the tire and axle shafts, and about 35x per second at the driveshaft. If the wobble is something like, 2-3 times per second, or less, the problem is not in your drivetrain. At least not likely. I'm just assuming a not too complicated dynamic system. After all, what's your caster angle?
--->But take off the front d/s as a first step.
At 55 mph, you're going some... 80 ft/s, and assuming... 8ft/revolution (tire circumference), that's 10x per second on the tire and axle shafts, and about 35x per second at the driveshaft. If the wobble is something like, 2-3 times per second, or less, the problem is not in your drivetrain. At least not likely. I'm just assuming a not too complicated dynamic system. After all, what's your caster angle?
--->But take off the front d/s as a first step.
robz95xj said:
Ok, I'm sort of confused by all of this...all I've ever delt with is Np 205's in broncos, where with the hubs unlocked, and the t case in 2wd the front shaft could spin freely by hand and would not spin while driving in 2wd. I was always under the impression that XJ's had a vaccum canister that engaged auto locking hubs. So basically the only place that the front shaft is disconnected is at the t-case?
kubtastic
NAXJA Forum User
- Location
- Tacoma, WA
XJ Hubs are always 'engaged.'
The disconnect on old XJ's was with a 2-piece shaft on the passenger side. In 2WD selected, The driver side shaft spins at full forward speed, the inner passenger side shaft at full backward speed, so the d/s remained steady. The passenger 2nd piece meanwhile spins in full forward, and so does its u joint and hub assembly.
The disconnect on old XJ's was with a 2-piece shaft on the passenger side. In 2WD selected, The driver side shaft spins at full forward speed, the inner passenger side shaft at full backward speed, so the d/s remained steady. The passenger 2nd piece meanwhile spins in full forward, and so does its u joint and hub assembly.
XgeekstarX
NAXJA Forum User
- Location
- winter springs, florida
AZ XJ said:
warn makes a hub conversion kit.
