9" Howls and vibrates...
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From: NW Chicago Subs
9" Howls and vibrates... I have 4.56 gears with a locker and it howls/whines pretty bad. I also have a fibration at 50+. Is this normal? It is all new stuff. New rear and driveshaft. I am planning on going to the track here soon and want to be sure everything is OK before I rip it. Also, how many quarts does it take? Some say 3 some say 4.
Fill it with fluid until it runs out of the fill plug on the side. The howling indicates your gears weren't set up optimally--need to re-set them to quiet the howling. The vibration is not normal but common after a swap. Most likely need to adjust your pinion angle to fix it. Keep an eye on your rear u-joint as it can die quickly when the pinion is way off (days). Also might want to check your rear to make sure it's centered and square.
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From: NW Chicago Subs
I checked the U and it is fine. My TA has a fixed angle in it so I can not adjust it. I will add fluid and see what happens. I am thinking it is not square since it pulls to the left when I give it gas and pulls to the right when I cost but my LCAs are fixed so I can not adjust that either. Looks like I may have to upgrade my LCAs this winter. I may swap the gear to a 4.10 but I do know I will be taking out the center to at least adjust the gears and re seal the center to the housing as it is seaping so I will look at the patern.
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From: Mehlingen, Germany
The Pull left andto the right is the characteristic of a detroit locker, which can be excerbated with different tire pressures , different tire diameters.
Vibration wise you may be able to rotate your Driveline 180 degrees and then bolt it back up to the axle , that may cure that.
As for the howling and whining gears , check gear pattern, ring gear to pinion backlash, and drivepinion preload.
Vibration wise you may be able to rotate your Driveline 180 degrees and then bolt it back up to the axle , that may cure that.
As for the howling and whining gears , check gear pattern, ring gear to pinion backlash, and drivepinion preload.
Thread Starter
11 Second Club
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From: NW Chicago Subs
I will try the pressure thing. I rotated the shaft 180* and no change. I will also try putting the LCAs in the stock location to see if that does anything as I think the LCA brackets are not perfectly even.
