Squeaks when in reverse...
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Senior User
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From: The great North East.
Squeaks when in reverse...
My 02 squeaks when I put the R400 tranny into reverse,(it sounds exactly like the bushings squeaking when you lower your tailgate). It only does this when you are pressing the go padal though. For example, if I am on a flat surface backing up and I let off the throttle, the squeaking will stop. It will increase or decrease depending on the speed of the truck and it sounds like it is coming from around the middle of the truck underneath the cab rear doors.
I did a quick search and come up with dry u-joints as a possible suspect but the fact that the noise comes and goes with the throttle has me stumped. Could it be the u-joints and that torque on the driveshaft has to be applied to make the noise?
Not sure if this is associated or not but my reverse sensor are operating sporadically also.
Thanks for any help!!
I did a quick search and come up with dry u-joints as a possible suspect but the fact that the noise comes and goes with the throttle has me stumped. Could it be the u-joints and that torque on the driveshaft has to be applied to make the noise?
Not sure if this is associated or not but my reverse sensor are operating sporadically also.
Thanks for any help!!
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Senior User
Joined: Jun 2010
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From: The great North East.
Thanks Damon, if that's the case then that makes perfect sense since I just replaced the rear u-joints. That makes it the front u-joints, which is right in the area the sound is coming from.
Glad it's something simple and not the tranny!!
Thanks again!
Glad it's something simple and not the tranny!!
Thanks again!
Post Fiend
Joined: Feb 2002
Posts: 10,600
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From: Carhenge
If not there, possibly the drive shaft carrier bearing is bad or the slip joint needs greased.
Cargo Master
Joined: Mar 2008
Posts: 2,975
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From: Archdale,N.C.
Shootin from the hip,it could be the shield on the rear brake calipers touching when you apply the peddle,giving it just a slight flex and causing one of them to touch the rotor.mine were bent and making a light scraping noise...
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Post Fiend
Joined: Feb 2008
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From: Lancaster, Pa.
Another shot from the hip but I'd say carrier bearing also, check first anyway. When my first one went out I heard a light rubber rubbing sound turning tight corners. Changed out this next one with the sound of a slight growling sound, going foward of course. About a 60.00 part.
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From: The great North East.
UPDATE>>>
Well I found the problem. It was the middle u-joint and that thing was definitely dry, so dry that it could not be moved by hand!
FYI, I went over the u-joints three different times while installed on the truck and you would have never noticed that they were bad. One must take the drive shaft down off the truck to thoroughly inspect the u-joints to know for sure.
As always, thanks for the help 7.3 guys!!!!
Now to find the growling from somewhere around the front end!!
FYI, I went over the u-joints three different times while installed on the truck and you would have never noticed that they were bad. One must take the drive shaft down off the truck to thoroughly inspect the u-joints to know for sure.
As always, thanks for the help 7.3 guys!!!!
Now to find the growling from somewhere around the front end!!
More Turbo
Joined: Jan 2006
Posts: 687
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From: Lake Charles, LA
Now dont get carried away, thats just the nature of the beast you have under the hood. Letting the old girl growl and snarl from time to time keeps her happy. haha
Anyway, glad you figured it out and got it fixed. This place is great.
Anyway, glad you figured it out and got it fixed. This place is great.
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From: The great North East.
Another shot from the hip but I'd say carrier bearing also, check first anyway. When my first one went out I heard a light rubber rubbing sound turning tight corners. Changed out this next one with the sound of a slight growling sound, going foward of course. About a 60.00 part.
I inspected my carrier bearing and everything looked and moved right but I still have this hum noise coming from around the drivers front area. It sounds just like a bearing going out but I replaced the hub bearings as well as the front axle bearing inside the axle tube?
I guess I should start a new thread on this issue.
Post Fiend
Joined: Feb 2008
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From: Lancaster, Pa.
Hey Mike, what did the growl sound like when your carrier bearing went out and where did the sound come from??
I inspected my carrier bearing and everything looked and moved right but I still have this hum noise coming from around the drivers front area. It sounds just like a bearing going out but I replaced the hub bearings as well as the front axle bearing inside the axle tube?
I guess I should start a new thread on this issue.
I inspected my carrier bearing and everything looked and moved right but I still have this hum noise coming from around the drivers front area. It sounds just like a bearing going out but I replaced the hub bearings as well as the front axle bearing inside the axle tube?
I guess I should start a new thread on this issue.
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From: The great North East.
Man, now you have me kinda' wishing I would have just replaced it also. I held the drive shaft standing straight up in the air, grabbed the carrier bearing and spun it around the drive shaft. It made about 4-5 complete rotations around the shaft and sounded good so I figured I would just leave it.
Post Fiend
Joined: Feb 2008
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From: Lancaster, Pa.
Man, now you have me kinda' wishing I would have just replaced it also. I held the drive shaft standing straight up in the air, grabbed the carrier bearing and spun it around the drive shaft. It made about 4-5 complete rotations around the shaft and sounded good so I figured I would just leave it.
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