The Ford Barn

TraVeler · 08-26-2023, 05:49 AM

Alright have a problem with a 31 special delivery. The back right tire locked up at slow speed with no brake on. Did that in reverse as well. I was able to limp home. I drained the differential and use magnet and found nothing. The wheels will spin each other on jack stands under axle in gear but the gear in differential does not turn. I dread a rebuild cause it doesnt look cheap. I will try to investigate brakes as well.

old31 · 08-26-2023, 07:21 AM

It is very possible that the emergency brake locked up. Loosen the adjusting bolt, remove the drum and inspect.

Do you have the red book as a guide?

nkaminar · 08-26-2023, 08:50 AM

This may help: https://www.santaanitaas.org/wp-cont...vised-2014.pdf

Gary WA · 08-26-2023, 09:11 AM

Quote:

Originally Posted by TraVeler

Alright have a problem with a 31 special delivery. The back right tire locked up at slow speed with no brake on. Did that in reverse as well. I was able to limp home. I drained the differential and use magnet and found nothing. The wheels will spin each other on jack stands under axle in gear but the gear in diiferential does not turn. I dread a rebuild cause it does look cheap. I will try to investigate brakes as well.

remove rear wheels and inspect before tearing into.

TraVeler · 08-26-2023, 10:15 AM

Okay pulled hubs. Right side all the wheel stubs came undone. Guess they didn't use impacts back then. anyways nothing loose. There is alot of play like 1/8" or more in the axle. if the E-brake locked up why would it make a loud bang?

Phil Brown · 08-26-2023, 10:30 AM

Sponsored Links (Register now to hide all advertisements)

Quote:

Originally Posted by TraVeler

The wheels will spin each other on jack stands under axle in gear but the gear in differential does not turn.

If the wheels spin, how can it be the brakes ?
sounds like the problem is in the differetial

TraVeler · 08-26-2023, 10:34 AM

The right side hub had score marks where the wheel studs are. Maybe something in the brakes was rubbing on it and there where some metal fillings down by the E brake spring.

Do axles normally have that much play?

TraVeler · 08-26-2023, 10:36 AM

Do you think the wheel studs could come loose and caused the bang?

CT Jack · 08-26-2023, 10:49 AM

Check the brake backing plates One of them could have cracked and got bent. This would move the shoe assembly and cause a lockup. It happenen to me once when touring. Apparently there was a backing plate design that could cause this to happen. When the lockup occurs it gives the impression something in rear end failed.
I replaced the backing plate with a different design and the problem was solved.

TraVeler · 08-26-2023, 12:53 PM

I will check the backing plate as well. The wheel stud definately came loose or someone previously tried to change the tire and the wheel stud spun out but it took a chunk out of one of the brake components. I have a picture but dont have an online image host.

I'm just gonna weld em in then grind em down. Looks like someone had already done that to one and I had to weld the other one to get the lugnut off.

spdway1 · 08-27-2023, 10:29 PM

I had this happen to my 29 CCPU. I would go and then feel it bind up and then bang. The bind-up and still rolling was what had us confused. After a lot of diagnosing transmission, driveline and u-joints, it was the rear end. I also put in the higher-speed ring and pinion while we were in there. Good luck with what you find.

Jim/GA · 08-28-2023, 08:27 AM

Quote:

Originally Posted by TraVeler

I will check the backing plate as well. The wheel stud definately came loose or someone previously tried to change the tire and the wheel stud spun out but it took a chunk out of one of the brake components. I have a picture but dont have an online image host.

You don't need an online image host to attach pictures to this site.

Look lower on the page for "Attach Files".

ModelA29 · 08-28-2023, 09:35 AM

Quote:

Originally Posted by Jim/GA

You don't need an online image host to attach pictures to this site.

Look lower on the page for "Attach Files".

You can't post images in the Quick Reply mode. You'll need to click on the "Go Advanced" button first then the "manage attachments" one.

TraVeler · 08-29-2023, 07:55 PM

here is the picture of the brake part that caught the loose wheel stud/lug nut

Gary WA · 08-30-2023, 04:03 PM

Quote:

Originally Posted by TraVeler

here is the picture of the brake part that caught the loose wheel stud/lug nut

At least you found the problem early! Thanks for the updated results!

08-26-2023, 05:49 AM	#1
TraVeler Junior Member Join Date: Jul 2023 Posts: 27	31 special delivery bang and lockup Alright have a problem with a 31 special delivery. The back right tire locked up at slow speed with no brake on. Did that in reverse as well. I was able to limp home. I drained the differential and use magnet and found nothing. The wheels will spin each other on jack stands under axle in gear but the gear in differential does not turn. I dread a rebuild cause it doesnt look cheap. I will try to investigate brakes as well. Last edited by TraVeler; 08-26-2023 at 10:14 AM.

08-26-2023, 07:21 AM	#2
old31 Senior Member Join Date: Jan 2016 Posts: 2,133	Re: 31 special delivery bang and lockup It is very possible that the emergency brake locked up. Loosen the adjusting bolt, remove the drum and inspect. Do you have the red book as a guide?

08-26-2023, 08:50 AM	#3
nkaminar Senior Member Join Date: Jan 2012 Location: Western North Carolina Posts: 4,102	Re: 31 special delivery bang and lockup This may help: https://www.santaanitaas.org/wp-cont...vised-2014.pdf __________________ A is for apple, green as the sky. Step on the gas, for tomorrow I die. Forget the brakes, they really don't work. The clutch always sticks, and starts with a jerk. My car grows red hair, and flies through the air. Driving's a blast, a blast from the past.

08-26-2023, 10:15 AM	#5
TraVeler Junior Member Join Date: Jul 2023 Posts: 27	Re: 31 special delivery bang and lockup Okay pulled hubs. Right side all the wheel stubs came undone. Guess they didn't use impacts back then. anyways nothing loose. There is alot of play like 1/8" or more in the axle. if the E-brake locked up why would it make a loud bang?

08-26-2023, 10:34 AM	#7
TraVeler Junior Member Join Date: Jul 2023 Posts: 27	Re: 31 special delivery bang and lockup The right side hub had score marks where the wheel studs are. Maybe something in the brakes was rubbing on it and there where some metal fillings down by the E brake spring. Do axles normally have that much play?

08-26-2023, 10:36 AM	#8
TraVeler Junior Member Join Date: Jul 2023 Posts: 27	Re: 31 special delivery bang and lockup Do you think the wheel studs could come loose and caused the bang?

08-26-2023, 10:49 AM	#9
CT Jack Senior Member Join Date: May 2010 Location: Hebron, CT Posts: 443	Re: 31 special delivery bang and lockup Check the brake backing plates One of them could have cracked and got bent. This would move the shoe assembly and cause a lockup. It happenen to me once when touring. Apparently there was a backing plate design that could cause this to happen. When the lockup occurs it gives the impression something in rear end failed. I replaced the backing plate with a different design and the problem was solved.

08-26-2023, 12:53 PM	#10
TraVeler Junior Member Join Date: Jul 2023 Posts: 27	Re: 31 special delivery bang and lockup I will check the backing plate as well. The wheel stud definately came loose or someone previously tried to change the tire and the wheel stud spun out but it took a chunk out of one of the brake components. I have a picture but dont have an online image host. I'm just gonna weld em in then grind em down. Looks like someone had already done that to one and I had to weld the other one to get the lugnut off.

08-27-2023, 10:29 PM	#11
spdway1 Senior Member Join Date: Feb 2011 Location: Chicopee, MA Posts: 1,415	Re: 31 special delivery bang and lockup I had this happen to my 29 CCPU. I would go and then feel it bind up and then bang. The bind-up and still rolling was what had us confused. After a lot of diagnosing transmission, driveline and u-joints, it was the rear end. I also put in the higher-speed ring and pinion while we were in there. Good luck with what you find.