Author Topic: Howling 8 3/4  (Read 860 times)

Offline Cuda72

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Howling 8 3/4
« on: October 28, 2020 - 09:38:05 PM »
A few years ago the 3.55 gears (8 3/4 489) in my '72 Cuda started howling when cruising along at 45-65mph, although it hasn't gotten any louder. I was afraid of causing more damage to the rear end so I recently swapped the 3rd member out for a 4.30 pumpkin I had laying around. This setup is really fun around town but is killing me at the gas station so I was thinking of swapping it back. My question is whether the howling rear end will eventually destroy itself or is it safe to keep running? I can deal with the noise but I just don't want to get stranded with a broken rear end someday. I'm half tempted to rebuild the current 3.55 with a new gear set, seals and bearings, but I've never tackled something like that before.

Offline jimynick

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Re: Howling 8 3/4
« Reply #1 on: October 29, 2020 - 04:25:41 PM »
A howl is usually caused by a going-away bearing/s and the problem, as you noted, isn't going to get better. The fly in the ointment is that there is the possibility that a failing bearing has a catastrophic failure, binds/welds itself to it's shaft and then the shaft fails and every thing goes to hell in a hand basket PDQ! I'd be inclined to either rebuild the carrier yourself or have it done. The money you'll save in gas will probably pay for it! LOL  :cheers: