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brakes dragging
#1397103 Sat Feb 13 2021 04:28 PM
Joined: Sep 2010
Posts: 1,695
W
back yard wrench turner
My '38 has a '58 1/2 ton rear axle. Recently I've had one of the brakes start dragging and slowing down the truck. It will smell if I don't notice it right away. I've been able to get the brakes to release by stopping and then reverse for a couple of feet.

I took off the wheel and the right brake drum, it has a small amount of grease on it. The shoes have grease on them. I figure this is causing the shoes to stick to the drum.

I plan to order a new axle seal, cover gasket, and brake shoes to fix this.

Is there anything else I should be looking at?

Last edited by Wayne67vert; Sat Feb 13 2021 04:29 PM.

Wayne

When I die, I hope she doesn't sell everything for what I told her I paid for it!

1938 1-Ton Farm Truck
-30-Stovebolt Gallery
Photos that I have shared on Stovebolt via PhotoBucket are no longer available. Please contact me if you want a photo from an old post. malmwayne@hotmail.com
Re: brakes dragging
Wayne67vert #1397107 Sat Feb 13 2021 04:33 PM
Joined: Mar 2010
Posts: 9,765
5
'Bolter
With the axle on a jack stand, lift up on the axle hub and feel for any up and down movement in the axle shaft. There shouldn't much if any at all if the bearings are in good shape.
New seals won't seal if the bearings are worn out.
These bearing ride on the axle, so if the bearings are worn, so is the axle shaft. I don't know if there are "bearing saver" kits available for that axle. These kits are an assembly which relocates where the bearing and seal rides on the axle shaft where the metal is not worn.

Last edited by 52Carl; Sat Feb 13 2021 04:38 PM.
Re: brakes dragging
Wayne67vert #1397110 Sat Feb 13 2021 04:40 PM
Joined: Mar 2014
Posts: 2,475
J
'Bolter
Please check the wheel cylinder, too and have the drum turned (at least just a bit to knock off any glazing--which you will have now). What looks like grease could be brake fluid and in my experience brake fluid is more common than grease to be what has gotten on your shoes. Good luck.


Jon

1952 1/2 ton with 1959 235
T5 with 3.07 rear end
Re: brakes dragging
Wayne67vert #1397233 Sun Feb 14 2021 02:10 PM
Joined: Sep 2010
Posts: 1,695
W
back yard wrench turner
Thanks for the suggestions. I'll be back at the repair soon.


Wayne

When I die, I hope she doesn't sell everything for what I told her I paid for it!

1938 1-Ton Farm Truck
-30-Stovebolt Gallery
Photos that I have shared on Stovebolt via PhotoBucket are no longer available. Please contact me if you want a photo from an old post. malmwayne@hotmail.com
Re: brakes dragging
Wayne67vert #1397245 Sun Feb 14 2021 03:36 PM
Joined: Apr 2007
Posts: 889
L
'Bolter
Wayne,
My '51 had the same problem. Turned out the axle vent was plugged with grease, dirt and paint. When the rear end heated up a bit and the air inside expanded it pushed the differential gear oil out past the axle seal, contaminating the shoes and drum. The way I figured that out was it occurred to me that if the gear oil was leaking it might be low, so after a drive I opened the oil fill plug and got a gush of air.

Being lazy and somewhat intimidated by the thought of replacing the seal, I sprayed the drum and shoes with ample brake cleaning fluid, put it back together, along with cleaning out the vent. That was 10+ years ago and several thousand miles with no problem.
Kent


1937 Chevy 1/2 ton
1942 Chevy 1/2 ton
1947 Diamond T Model 509
1951 Chevy 1/2 ton
1950 Chevy COE Model 5700 ~ "Barney" ~ And more pix
Re: brakes dragging
Wayne67vert #1397276 Sun Feb 14 2021 05:20 PM
Joined: Sep 2015
Posts: 88
D
'Bolter
Wayne,

I had the same problem as Lightholder’s Dad on my 58, 3100 with the stock axle. Cleaned everything up including the vent and haven’t had a problem since.

Definitely worth cleaning the vent while you’re in there.


Dan

35 CC Case
38 Chevy Pickup
51 3100 AD
58 3100 Apache Fleetside
Re: brakes dragging
Wayne67vert #1397280 Sun Feb 14 2021 05:45 PM
Joined: Sep 2010
Posts: 1,695
W
back yard wrench turner
That sounds like a great plan. I'll clean the vent and then check.


Wayne

When I die, I hope she doesn't sell everything for what I told her I paid for it!

1938 1-Ton Farm Truck
-30-Stovebolt Gallery
Photos that I have shared on Stovebolt via PhotoBucket are no longer available. Please contact me if you want a photo from an old post. malmwayne@hotmail.com
Re: brakes dragging
Lightholder's Dad #1397332 Sun Feb 14 2021 10:42 PM
Joined: May 2015
Posts: 4,178
Housekeeping (Moderator) Making a Stovebolt Bed & Paint and Body Shop Forums
Originally Posted by Lightholder's Dad
My '51 had the same problem. Turned out the axle vent was plugged with grease, dirt and paint.
My '51 rear axle has the same issue, although it was a PO's self inflicted wound. Someone stuck a pipe plug where the vent belongs. dang Saw that when I removed the bed. I'm planning on replacing everything outboard of the axle bearings AND that pipe plug.


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: brakes dragging
Wayne67vert #1397345 Sun Feb 14 2021 11:35 PM
Joined: Jun 2011
Posts: 4,198
E
'Bolter
Modern trucks have a rubber hose attached to breather and end somewhere hidden in the frame to let the axle breathe, usually on right side.

Ed

Last edited by EdPruss; Sun Feb 14 2021 11:37 PM.

'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: brakes dragging
Wayne67vert #1397352 Mon Feb 15 2021 12:01 AM
Joined: Jan 2001
Posts: 5,132
P
'Bolter
Fixing the leak is important, but I suspect the e brake cable is sticking, causing the problem. The action of backing up pulls the cable back to the “off” position.


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