Weird Noise Sounds like something in the transmission - Ford Powerstroke Diesel Forum
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Old 05-10-2013, 03:45 PM
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Weird Noise Sounds like something in the transmission

About a month ago I started to get this weird noise. Like a slipping, grinding noise. I first noticed it when I was at a stop and turning right. Push on the fuel peddle and turn right and once I was out of the turn it would stop. Well now, it will do it once in a while from any stop. I have about 216 k on my 1999 F250 PS 4X4 crewcab. I bought it used. I'm faithful about changing the oil, but have yet to change the tranny fluid. I have crawled underneath and check the all the u-joints and anything that I could see just with my eyes. Guess my question is would it be my tranny and what would it be if it was my tranny?
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Old 05-10-2013, 04:07 PM
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Does it make the noise while you're just sitting there idling? If so I would think broken flexplate.
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Old 05-10-2013, 05:35 PM
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I also have a noise mine is like a rattle like a heat shield or a bad bearing I think mind is the tq converter .... I've researched the broken flex plates and I took off my inspection plate and you could see the flex plate wobbling while running. You can hear it while its idling once you hit about 1800 is goes away but comes back right after but it's quieter or harder to hear cuz the engine noise... Maybe we have the same problem just sharing my experience!! I got a cleaned used flex plate but I'm doing a tq con to why I'm in there lol
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Old 05-11-2013, 09:04 AM
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No it does not do it at a idle. I notice it the most when I'm making a right hand turn from a stop. Even if I let off the throttle in the turn then push on it again it will still do it until I'm rolling.
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Old 05-11-2013, 10:43 AM
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Hmmm doesn't sound like turning right has anything to do with it... Maybe the diff? The clutches could be going bad and it does work off torque when throttle applies they will start to grip I think that's how it works I just don't k ow how turning right has anything to do with the tranny
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Old 05-11-2013, 11:35 AM
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That might make sense. Maybe its not a turning right thing, but the torque that it takes to get going and with it having to work a little harder when turning. I don't know. Its starting to worry me. I want to fix it before it gets worse.
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Old 05-11-2013, 12:43 PM
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Wheel Bearings Good?

You might jack it up and check the wheel bearings for any slop or play.

Also, does it make any difference if the hubs are locked or not?

For what its worth, my truck had no issues going straight when my unit bearings started to go out, but made a dull "growling" sound when turning (left or right) - new bearings (and ball joints in my case) solved that problem.
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Old 05-11-2013, 12:58 PM
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Quote:
Originally Posted by AlaskanEngineer View Post
You might jack it up and check the wheel bearings for any slop or play.

Also, does it make any difference if the hubs are locked or not?

For what its worth, my truck had no issues going straight when my unit bearings started to go out, but made a dull "growling" sound when turning (left or right) - new bearings (and ball joints in my case) solved that problem.
Good idea...... That is what mine is a dull growling, grinding noise. That might make sense. When I turn right it would be pulling that right rear wheel out so would make that sound. Thanks AlaskenEngineer.
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Old 05-21-2013, 01:32 PM
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So I think I have narrowed it down. I'm going to replace both rear bearings and seals. Would anyone suggest anything else that I should do while I'm in there?
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Old 05-21-2013, 02:39 PM
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lube the slip joint on the rear driveshaft. they are known to cause slippage in the drivetrain. its easy takes like 15-20 mins while your down there.
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