Noise from Thrasmission and U-Joint

L

larryf

Member
I was driving dow nthe street today and started to hear a clunking in second gear. Then it went to first. Got home and and here is the dilemna. No n oise when cluth is in and running. Let out clutch in neutral and clunk clunk clunk. Turn off motoer a d let roll and clunk clunk clunk. Try to drive and double clunk clunk clunk. Thin U-Joint and transmission but other thoughts.
 
The U-joint only moves when the car moves. I'd do as Paul said, but if it's the small roller bearing between the input and output shafts, (as it was in my ******) then you can't see anything until you take the input shaft out. On my car it was unreal how much noise that little bearing made. That bearing isn't working in high gear, so it only makes noise in 1st and 2nd.
 
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Tom Wesenberg said:
The U-joint only moves when the car moves. I'd do as Paul said, but if it's the small roller bearing (as it was in my ******) then you can't see anything until you take the input shaft out. On my car it was unreal how much noise that little bearing made. That bearing isn't working in high gear, so it only makes noise in 1st and 2nd.
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The three roller bearings, one inside the input shaft and the two inside the cluster gear can make a lot of noise when they fail. I have taken transmissions apart where these bearings were ground to paste. Another thing to look for is the condition of the front bearing surface of the main shaft where the roller bearing inside of the input shaft rides. Quite often it is shot. Look for galling where the hard finish is gone. People tend to overlook this. If the bearing surface on the shaft is shot a new bearing will not last long.

Tom Endy
 
Tom Endy said:
The three roller bearings, one inside the input shaft and the two inside the cluster gear can make a lot of noise when they fail. I have taken transmissions apart where these bearings were ground to paste. Another thing to look for is the condition of the front bearing surface of the main shaft where the roller bearing inside of the input shaft rides. Quite often it is shot. Look for galling where the hard finish is gone. People tend to overlook this. If the bearing surface on the shaft is shot a new bearing will not last long.

Tom Endy
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I've also seen the bearing surface inside the main drive gear worn through the hard facing at this same bearing. That will ruin the bearing quickly as well.
 
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