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Odd sizzling sound?

2259 Views 22 Replies 11 Participants Last post by  jon_7248
Now this is going to sound weird. For about a month maybe I have been hearing this sound while im on the highway. I have an Xcab so I can lean the seat back to try to find where it's comming from. It sounds like it's from the middle of the truck, maybe slightly to the driverside. But here is the deal. It sounds like a sizzling sound and only happens when I go over 50mpg and cruising. If I accelerate, it goes away and when I dont use the throttle at all it's gone too.

I cant figure out for the life of me what it is! I thought it was just something flapping in the wind like some tape or something, but it's deffinatly related to the throttle, and only at cruise... in other words just barly giving gas at all!

Any ideas????
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scottnmos said:
Check your carrier bearing, it could be going bad or just need lube. Sounds like something that happened to me.
Speaking of the carrier bearing, it has that rubber "donut" bushing around it. Any idea how much play is supposed to be in that? There is a ton of play in mine - but the bearing spins fine and doesn't make any noise.
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