2001 XJ Sport, 164k mi, 4.0, AW-4, SYE, D44, 8.8, 37" MTRs
So driving home from the meet and greet tonight I was reminded of a vibe I'm trying to chase down. Seems worst around 45 MPH, smooths out some after that, starts to get a little noisy again above 70. Also, the second I take my foot off the gas it stops.
Front hubs are manual and in the open position, so no front driveshaft movement. If it was the tires I wouldn't think it would stop when I let off the gas. I've had an alignment recently as well.
The only thing I can think of is the rear driveshaft. I had the splines and yoke/sleve replaced when it was lengthened, and it was reballanced. Then on a road trip the socket/ball piece in the double cardan joint went bad so I had that replaced and the U-joints. All of this in the last 600 miles or so. (Note to self, don't lengthen a stock JY shaft, just buy a custom built one!)
Anyway, if the rear driveshaft just needs to be reballanced for some reason then cool, but is there something else I could be overlooking? Also, I've had 2 of those ball and socket joints go out on me, both were JY shafts so maybe that's the problem, or could something upline be causing the vibes and therefore the failures? (The previous owner did the SYE, but looks good and fluid in the transfer case is where it should be.)
Any insight appreciated!
So driving home from the meet and greet tonight I was reminded of a vibe I'm trying to chase down. Seems worst around 45 MPH, smooths out some after that, starts to get a little noisy again above 70. Also, the second I take my foot off the gas it stops.
Front hubs are manual and in the open position, so no front driveshaft movement. If it was the tires I wouldn't think it would stop when I let off the gas. I've had an alignment recently as well.
The only thing I can think of is the rear driveshaft. I had the splines and yoke/sleve replaced when it was lengthened, and it was reballanced. Then on a road trip the socket/ball piece in the double cardan joint went bad so I had that replaced and the U-joints. All of this in the last 600 miles or so. (Note to self, don't lengthen a stock JY shaft, just buy a custom built one!)
Anyway, if the rear driveshaft just needs to be reballanced for some reason then cool, but is there something else I could be overlooking? Also, I've had 2 of those ball and socket joints go out on me, both were JY shafts so maybe that's the problem, or could something upline be causing the vibes and therefore the failures? (The previous owner did the SYE, but looks good and fluid in the transfer case is where it should be.)
Any insight appreciated!