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Speed related Sqweal coming from Transmission


mtnsummit

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Hi I have a '97 Ranger 2wd with a 3ltr and M5OD-R1 Tranny and lately it has been making alot of noise. I have sourced out the sound to the transmission but I don't know what could be causing it. I suspect a bearing is worn out as it sounds like it. The only thing is it only makes the noise when I am going 30-45 mph. Any help would be great.:dntknw:
 


MAKG

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If the noise isn't tied to a specific gear, I'd suspect the driveshaft or rear end. MAYBE the rear transmission bushing.
 

mtnsummit

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I have a copy of the ford tech. cd I search through it but couldn't find any mention of a rear tranny bushing. Where would this be located in the tranny? Is this a bearing that supports the drive shaft yoke where it enters the transmission? I have checked and replaced all my u-joints as well as the drive shaft support bearing. I forgot to mention that this is a 4x2 truck. There are no abnormal sounds coming from the diff. I have brought it up to speed on stands and it still squeels between 30-45 mph. Any more help / suggestions would be appreciated. Thanks
 
Jspafford

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Could it be the pilot bearing or the slave cylinder? Is the noise coming from up at the front of the transmission or towards the rear?
 

MAKG

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The pilot bushing doesn't move unless the clutch is down. Release bearing noises are RPM, not speed, related. Same with transmission input and countershaft bearings (not the mainshaft, though).
 

mtnsummit

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To add some more information to help me solve this problem I have occasionally smelt burning rubber. Anymore help would be appreciated.
 

MAKG

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Brakes? Do you have a two piece driveshaft with a center bearing?
 

mtnsummit

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Yes I have a two piece drive shaft, I have checked the support bearing it is fine I replaced it about a year ago.
 

Natedog

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mtnsummit said:
... couldn't find any mention of a rear tranny bushing. Where would this be located in the tranny? Is this a bearing that supports the drive shaft yoke where it enters the transmission?
Click to expand...
Yes.

MAKG, good suggestion to check the carrier bearing for the burning rubber smell.
 
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