Rear end howl-all new parts and bearings, howls on jack stands in forward but not reverse, any sugestions as I am out of them
The pinion gear is not in correct mesh with the crown wheel. It is not just a case of throwing parts in and putting it together but the correct mesh and preload of the crown wheel and pinion and the bearings has to be obtained . There are plenty of chevy workshop manuals that tell you how to get it right as the diff set up is constant across the range.
SOURCE: 2001 Chevrolet Cavalier front End Roar
You must replace wheel bearings in pairs to avoid loading the old bearing and, in time ruining your new bearing hub it is possible that you have already damaged the new hub
SOURCE: 1998 Silverado 1500 Rear End Howl/Leak/Clunk/Vibration Pinion
A pinion seal leaks for one or boyh of these reasons. A worn pinion bearing or a driveshaft vibration, Sounds as though you have both. Do not confuse tire howl with gear howl, be sure.The rear end can run 3 to 500.00 if not more. Ck the gear oil in the rearend for metal content. That will tell you alot. The hard shifting is generally from a sticky spool in the trans valve body. Have the trans serviced w/new oil and filter. The new oil often cleans the moving parts of gum and varnish buildup.in the valve body. One more thing, the rear ends take a special oil and additive if it's a limited slip or posi lock. You will have a popping/binding noise when turning if the wrong lube is install. Have your driveshaft aligned and balanced at at driveshaft shop.or you will end up tearing up the tailshaft on the trans. Good Luck
SOURCE: Rear end howls when accelerating at high speeds
You need to check the gears in the differential and the U-Joint at the differential. Before you open the differential though find the fluid level check bolt and remove it. Stick your finger in the hole and check the fluid level. If it is low fill it and see if that solves the problem. I would look at the u-joint and fluid level and if both are good then look inside the rear differential. If the fluid is low you need to locate the leak
SOURCE: rear end making a howling noise already changed
HI if the noise comes and goes when you accelerate or decelerate you may be dealing whit the ring and pinion needs adjustment or is going out, remove the rear cover and check for excess metal shavings,Hope this help
SOURCE: There is a loud howling
If it's a All Wheel Drive then it could be a gear oil leak that has caused a bearing in the drive train to fail. Just adding gear oil won't fix the problem, but may limit the damage until it's repaired.
If it's a Front Wheel Drive, then you may have a Wheel Hub Bearing Assembly failing. This usually has a ABS [ Anti-Lock Brake ] light associated with it.
Either is dangerous and should be checked ASAP.
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