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Noisy Drivetrain
#1331651 Tue Oct 29 2019 12:08 AM
Joined: Feb 2019
Posts: 839
P
Phak1 Offline OP
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I finally had a chance to put some miles on my ‘52 Chevy 3100 with a 235, the original 3 speed transmission and the original 4:11 torque tube rear. I would expect the transmission to be whiney in first and even second but quiet down in third. It is so noisy while driving @ 35-45 MPH, that it would be hard to carry on a conversation without talking loud. When I push the clutch in it quiets down. I won’t dare go any faster.

The transmission shifts fine. One other clue may be that the torque tube is leaking at the transmission.

Your thoughts?


Phil

1952 Chevrolet 3100
Project Journals
‘59 235 & hydraulic lifters
“Three on the Tree” & 4:11 torque tube
12v w/ Alternator
Re: Noisy Drivetrain
Phak1 #1331676 Tue Oct 29 2019 01:43 AM
Joined: May 2015
Posts: 2,790
Housekeeping (Moderator) Making a Stovebolt Bed & Paint and Body Shop Forums
Could be the rear end as well. I wouldn't rule it out.


Kevin
First car '29 Ford Special Coupe
#2 - '29 Ford pickup restored from the ground up.
Newest Project - 51 Chevy 3100 work truck. Photos [flickr.com]
Busting rust since the mid-60's
Re: Noisy Drivetrain
Phak1 #1331685 Tue Oct 29 2019 01:57 AM
Joined: Mar 2019
Posts: 1,030
G
Shop Shark
There shouldn't be transmission fluid anywhere near that trans. It should be gear lube. Which is it?

Re: Noisy Drivetrain
Phak1 #1331697 Tue Oct 29 2019 02:28 AM
Joined: Feb 2019
Posts: 839
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Phak1 Offline OP
AD Addict
Gear lube is leaking at the connection between the torque tube and the transmission.


Phil

1952 Chevrolet 3100
Project Journals
‘59 235 & hydraulic lifters
“Three on the Tree” & 4:11 torque tube
12v w/ Alternator
Re: Noisy Drivetrain
Phak1 #1331699 Tue Oct 29 2019 02:47 AM
Joined: Mar 2019
Posts: 1,030
G
Shop Shark
Ok great. But unless its draining as fast as your filling, you should be able to fill, drive and notice a difference if its a low fluid level causing the noise. If noise is still present, then damage may be done. And parts are required to quiet this beast. What I would do at that point is get it up in the air, have someone run it through the gears while you are under it with a mechanics stethoscope and start figuring from there. At least you be able to pin down the exact area of the culprit.

Re: Noisy Drivetrain
Phak1 #1331704 Tue Oct 29 2019 03:16 AM
Joined: Feb 2019
Posts: 839
P
Phak1 Offline OP
AD Addict
I topped it off before I started driving and it’s not pouring out, more of a weep. If I let it sit for week I’ll have a spot on the garage floor about 2” around. I’ve put less that a hundred miles on her since first started driving her.


Last edited by Phak1; Tue Oct 29 2019 03:19 AM.

Phil

1952 Chevrolet 3100
Project Journals
‘59 235 & hydraulic lifters
“Three on the Tree” & 4:11 torque tube
12v w/ Alternator
Re: Noisy Drivetrain
Phak1 #1331708 Tue Oct 29 2019 03:42 AM
Joined: Jun 2011
Posts: 3,630
E
Shop Shark
Driving along a quiet street or alley with a wall on one side allows one to hear many noises. Some noise with a higher frequency than driveshaft could be countershaft. Pinion bearings usually will whine upon accel. coast. Throw out bearing could have noise changed by clutch application. Trans. bearings, driveshaft, pinion bearings would have higher frequency than rear axle bearings.

Ed


'37 GMC T-18 w/ DD 4-53T, RTO-610, 6231 aux., '95 GMC running gear, full disc brakes, power steering, 22.5 wheels and tires.
'47 GMC 1 ton w/ 302, NP-540, 4wd, full width Blazer front axle.
'54 GMC 630 w/ 503 gasser, 5 speed, ex fire truck, shortened WB 4', install 8' bed.
'55 GMC 370 w/270, 420 4 speed, grain, dump bed truck from ND. Works OK.
Re: Noisy Drivetrain
Phak1 #1332930 Thu Nov 07 2019 11:22 PM
Joined: Feb 2019
Posts: 839
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Phak1 Offline OP
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Well, humbled again, Glenns Towing was right. The issue was there wasn’t enough gear oil in the transmission. When I checked the oil prior to her first run, I stuck my pinky in and didn’t feel any. I added some gear oil and checked and thought I felt oil. This time I filled until it ran out. Messy but effective. A lesson learned. Its not total silent but I was able to get her up to 50 MPH and felt somewhat comfortable with running at that speed. Before that, 40 was stretching it.

Thanks all for you suggestions!


Phil

1952 Chevrolet 3100
Project Journals
‘59 235 & hydraulic lifters
“Three on the Tree” & 4:11 torque tube
12v w/ Alternator
Re: Noisy Drivetrain
Phak1 #1332954 Fri Nov 08 2019 03:51 AM
Joined: Mar 2019
Posts: 1,030
G
Shop Shark
Glad to help. Keep on trucking. thumbs_up


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