Go Back   The Ford Barn > General Discussion > Early V8 (1932-53)

Sponsored Links (Register now to hide all advertisements)

Reply
 
Thread Tools Display Modes
Old 05-19-2021, 12:44 PM   #1
Admiral
Senior Member
 
Admiral's Avatar
 
Join Date: Jul 2011
Location: Oakland County, Michigan
Posts: 552
Default Spring Shackles

What's the consensus on replacement spring shackles? I'm running a set of nice NOS units on my 1936 sedan, the only problem is, they creak and groan like an old man climbing a flight of stairs. I've tried tightening and loosening the crossbars and attempted to get some penetrating lubricant into the rubber, but nothing has made any difference whatsoever.

I hear there are some newer replacement-type shackles that might be better, but I'm not sure what would work best. I hear urethane bushings squeak just as bad or worse. These nylon ones from Speedway seem highly rated, but I'm not sure what's best.

https://www.speedwaymotors.com/Trans...ings,2083.html
__________________
Eight cylinders, four doors, three speeds, one good time
Admiral is offline   Reply With Quote
Old 05-19-2021, 01:43 PM   #2
bbrocksr
Senior Member
 
Join Date: May 2010
Location: Yakima Washington
Posts: 738
Default Re: Spring Shackles

Quote:
Originally Posted by Admiral View Post
What's the consensus on replacement spring shackles? I'm running a set of nice NOS units on my 1936 sedan, the only problem is, they creak and groan like an old man climbing a flight of stairs. I've tried tightening and loosening the crossbars and attempted to get some penetrating lubricant into the rubber, but nothing has made any difference whatsoever.

I hear there are some newer replacement-type shackles that might be better, but I'm not sure what would work best. I hear urethane bushings squeak just as bad or worse. These nylon ones from Speedway seem highly rated, but I'm not sure what's best.

https://www.speedwaymotors.com/Trans...ings,2083.html
I used the Speedway shackles with urethane bushings and they didn't last very long. I replaced the bushings with oilite bronze bushings.
There is a lot of horizontal pressure on those bushings as well as the weight of the car.

Bill
bbrocksr is offline   Reply With Quote
Sponsored Links (Register now to hide all advertisements)
Old 05-19-2021, 02:33 PM   #3
Lawson Cox
Senior Member
 
Lawson Cox's Avatar
 
Join Date: May 2010
Location: Above the gnat line in Georgia
Posts: 5,482
Default Re: Spring Shackles

Stick with the NOS ones. I installed the nylon ones and they have worn out in less than 2000 miles. I am beginning to think about replacing them with oilite bushings. What say y'all about that?
__________________
Life is like a roll of toilet paper. The closer to the end, the faster it goes.

It is better to be seen, than viewed.


"We sleep safe in our beds because rough men stand ready in the night to visit violence on those who would do us harm".
Lawson Cox is offline   Reply With Quote
Old 05-19-2021, 02:34 PM   #4
JSeery
Senior Member
 
JSeery's Avatar
 
Join Date: Nov 2012
Location: Wichita KS
Posts: 15,958
Default Re: Spring Shackles

There is a difference in how they work. Original Ford shackles should not allow the bolts to turn freely, they provide resistance that dampens the spring movement. More modern replacements do not.
JSeery is offline   Reply With Quote
Old 05-19-2021, 02:57 PM   #5
Pete
Senior Member
 
Pete's Avatar
 
Join Date: May 2010
Location: Wa.
Posts: 4,277
Default Re: Spring Shackles

I made my own from moly filled Delrin. I have been using this stuff since the late 50's.
You have to grease them once in awhile.
Everything should be loose and free for best chassis setup and ride.
You want MINIMAL damping in the spring itself. That is the shock absorber job.
Pete is offline   Reply With Quote
Old 05-19-2021, 03:46 PM   #6
ford38v8
Senior Member
 
ford38v8's Avatar
 
Join Date: Jul 2011
Location: SF Bay Area
Posts: 5,541
Default Re: Spring Shackles

Sponsored Links (Register now to hide all advertisements)
I have to agree with Pete, delryn is better than nylon, and should last 100,000 miles as compared to only 50,000 miles for nylon. My Speedway nylon shackles have only about 20,000 miles on them, so I canít be sure if they will last another 30,000 miles.
__________________
Alan
ford38v8 is offline   Reply With Quote
Old 05-19-2021, 06:43 PM   #7
DavidG
Senior Member
 
DavidG's Avatar
 
Join Date: May 2010
Posts: 7,723
Default Re: Spring Shackles

If your new shackle studs are filled with rubber, they are not NOS, but rather NORS as Ford shifted to asbestos filled studs starting with the '33 models.
DavidG is offline   Reply With Quote
Old 05-20-2021, 07:38 PM   #8
Admiral
Senior Member
 
Admiral's Avatar
 
Join Date: Jul 2011
Location: Oakland County, Michigan
Posts: 552
Default Re: Spring Shackles

Quote:
Originally Posted by bbrocksr View Post
I used the Speedway shackles with urethane bushings and they didn't last very long. I replaced the bushings with oilite bronze bushings.
There is a lot of horizontal pressure on those bushings as well as the weight of the car.

Good to know about the Speedway ones...

Bill
Quote:
Originally Posted by Pete View Post
I made my own from moly filled Delrin. I have been using this stuff since the late 50's.
You have to grease them once in awhile.
Everything should be loose and free for best chassis setup and ride.
You want MINIMAL damping in the spring itself. That is the shock absorber job.
Delrin would be great, but man is it expensive! Have you ever tried bronze bushings?
__________________
Eight cylinders, four doors, three speeds, one good time
Admiral is offline   Reply With Quote
Old 05-20-2021, 08:22 PM   #9
Pete
Senior Member
 
Pete's Avatar
 
Join Date: May 2010
Location: Wa.
Posts: 4,277
Default Re: Spring Shackles

Quote:
Originally Posted by Admiral View Post
Delrin would be great, but man is it expensive! Have you ever tried bronze bushings?
Not for that use because they won't last as long as moly-Delrin.
The set in my vintage circle track race car has 10 seasons on them and still good.
Pete is offline   Reply With Quote
Old 05-20-2021, 09:30 PM   #10
fordor41
Senior Member
 
fordor41's Avatar
 
Join Date: Oct 2011
Location: elmira,ny
Posts: 1,005
Default Re: Spring Shackles

I used moly filled Nylon bushing in my '41. installed them in about '95 and were still in the car, without any noticeable wear, when we sold it in about '17.
fordor41 is offline   Reply With Quote
Old 05-20-2021, 10:28 PM   #11
Tinker
Senior Member
 
Tinker's Avatar
 
Join Date: May 2010
Location: MN/FL
Posts: 6,183
Default Re: Spring Shackles

It is a lot easier to use new style nylon/poly/moly bushings over the original style. If you have a points car the original style is needed. otherwise it's not really anything anyone will see. I have them on my 38, but my exhaust is a little loud (not too loud, but louder then I would like, sooo maybe too loud ) and I do not hear any squeaking.
Tinker is offline   Reply With Quote
Old 05-21-2021, 08:07 AM   #12
Admiral
Senior Member
 
Admiral's Avatar
 
Join Date: Jul 2011
Location: Oakland County, Michigan
Posts: 552
Default Re: Spring Shackles

Quote:
Originally Posted by Pete View Post
Not for that use because they won't last as long as moly-Delrin.
The set in my vintage circle track race car has 10 seasons on them and still good.
Great to know. I went ahead and ordered some Delrin rod from McMaster-Carr, which had it for a good price. I'm thinking of making these new shackles with grease fittings for easier maintenance. Any thoughts on this, Pete?

Quote:
Originally Posted by Tinker View Post
It is a lot easier to use new style nylon/poly/moly bushings over the original style. If you have a points car the original style is needed. otherwise it's not really anything anyone will see. I have them on my 38, but my exhaust is a little loud (not too loud, but louder then I would like, sooo maybe too loud ) and I do not hear any squeaking.
My '36 couldn't be any farther from a points car... well, it could, if it had a 350 Chevy and an automatic transmission... I'm no stickler for authenticity. I like stuff to be durable and serviceable.
__________________
Eight cylinders, four doors, three speeds, one good time
Admiral is offline   Reply With Quote
Old 05-21-2021, 12:03 PM   #13
Pete
Senior Member
 
Pete's Avatar
 
Join Date: May 2010
Location: Wa.
Posts: 4,277
Default Re: Spring Shackles

Quote:
Originally Posted by Admiral View Post
Great to know. I went ahead and ordered some Delrin rod from McMaster-Carr, which had it for a good price. I'm thinking of making these new shackles with grease fittings for easier maintenance. Any thoughts on this, Pete?
Yes, they need grease.
Several ways to route the grease in. I prefer going in the side rather than drilling the shaft which weakens it. Both the inside and outside of the bushing need grease. I run .002 clearance on both.
Pete is offline   Reply With Quote
Old 05-21-2021, 01:36 PM   #14
JM 35 Sedan
Senior Member
 
JM 35 Sedan's Avatar
 
Join Date: May 2010
Location: Near Rising Sun, Maryland
Posts: 10,369
Default Re: Spring Shackles

Admiral, some of that groaning and squeaking you hear could be coming from the spring leaves lacking lubrication. I found that to be causing the problem on my '35 fordor sedan. When I took the spring pack apart, I could see the steel to steel rubbing marks and fretting corrosion around the tips of each leaf. After cleaning and smoothing those areas, and applying spring lube, most all of those noises disappeared.
__________________
John

"Never give up on what you really want to do. The person with big dreams is more powerful than one with all the facts". Albert Einstein
JM 35 Sedan is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Sponsored Links (Register now to hide all advertisements)


All times are GMT -5. The time now is 03:30 AM.