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How do I replace the mid shaft bearing on my 1971 chevy truck
Sent to Car Experts August 03 11:43 AM

I believe my mid shaft bearing is the source of vibration and noise in the drive train. I have a 1971 Chevy C10 pickup, with 307 c.i. engine and Saginaw 4 speed transmission.

Customer (name blocked for privacy)
Status:  Closed   Value: $8
Answer
August 3 11:46 AM (3 minutes and 15 seconds later)
         
REPLIEDCheck Mark

Hello

Are you talking about the carrier bearing, the bearing holding the drive shaft in the middle??



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PictureMechanicMan -- Master Auto Tech -- 98% Positive Feedback on 661 Car Accepts
Master Auto Technician 28yrs Electrical and Mechanical experience
Reply
August 3 12:13 PM (27 minutes and 23 seconds later)
         
Reply to MechanicMan's Post: Yes; there is a "hanger" of sorts in the middle just in front of the rear of the first (front) drive shaft. I can tell the noise is caused by increase of revolutions of something down there and I can feel the vibration. I looked at this piece and there is enough space around the shaft to see about 1/2 clearance all the way around. If that isn't the source I am open to expert opinion for sure!!
Thanks; this is my only mode of working transportation; my 89 Voyager's fuel pump died last week! :-(
Customer (name blocked for privacy)
Answer
August 3 12:35 PM (21 minutes and 19 seconds later)
         
REPLIEDCheck Mark

Hello

First you need to check u-joints for any play. To replace the carrier bearing you will need to take to a reputable machine shop or auto shop, so they can press bearing on. I would replace all u-joints as a preventative maintenence procedure.



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PictureMechanicMan -- Master Auto Tech -- 98% Positive Feedback on 661 Car Accepts
Master Auto Technician 28yrs Electrical and Mechanical experience
Reply
August 3 1:01 PM (25 minutes and 43 seconds later)
         
Reply to MechanicMan's Post: How do I determine"excessive play" in the U-Joint? Also, from what I have found on the net here, it appears that the bearing portion of the carrier bearing should be packed with grease, lube, silicon or something. Now granted it is open bearing and has several rectangular openings, would just packing this think with one of the above eliminate the noise/vibration? It is currently bone dry.
Customer (name blocked for privacy)
Answer
August 3 1:09 PM (8 minutes and 22 seconds later)
         
REPLIEDCheck Mark

Hey

You dont put grease in the open areas...there should be a zerk fitting where you place a grease gun and grease goes inside bearing. To check u- joints grab drive shaft with both hands and move left, right, up and down and twisting watch for any movement. If any movement they are bad. You may see gear movement but you need to look at joint for movement!!!

Let me know I really want to HELP you!



If this helps PLEASE hit the ACCEPT button and Please Give POSITIVE FEEDBACK!! BONUSES WELCOMED!Thanks
PictureMechanicMan -- Master Auto Tech -- 98% Positive Feedback on 661 Car Accepts
Master Auto Technician 28yrs Electrical and Mechanical experience
Reply
August 3 2:09 PM (59 minutes and 44 seconds later)
         
Reply to MechanicMan's Post: First the "bearing"; from what I can see, it is not a "classic" bearing. It is not a sealed bearing; it is round (goes around drive shaft), it is metal encased but has rubber around the inside. It's openings are several (3-4) rectangular in shape, and I can see inside thru those openings. The piece I am talking about is not in constant contact with the drive shaft; just surrounds it. I can wiggle the shaft back and forth, up and down inside of this bearing and it has about 1/2 inch of clearance all the way around it. As for U-Joints, I can try to turn the drive shaft but can't really detect alot of "slop" in the joint. Wish I had a camera phone so I could take a picture!
Customer (name blocked for privacy)
Answer
August 3 2:49 PM (40 minutes and 11 seconds later)
         
ACCEPTEDCheck Mark

The bearing is in the rubber..it is in full contact with drive shaft the rubber is a bushing and lets it to move.

You can listen for noise by lifting rear end up and place on jack stands...don't forget to block front wheels as to secure truck from moving. Place transmission in drive and have assisstant rev engine slowly to 65 mph. You should able to tell where noise is eminating from. Also watch for vibration.

Hope this helps



If this helps PLEASE hit the ACCEPT button and Please Give POSITIVE FEEDBACK!! BONUSES WELCOMED!Thanks
PictureMechanicMan -- Master Auto Tech -- 98% Positive Feedback on 661 Car Accepts
Master Auto Technician 28yrs Electrical and Mechanical experience
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