rear spring swap
Thread Starter
|
Posting Guru
Joined: Mar 2006
Posts: 1,182
Likes: 1
rear spring swap
long story- i'm rebuilding the rear of my '65.
i have a set of springs that came off a '72.
here's one end of the '72 spring. it looks the same as the '65.
but...the other end- what is this S-shaped thing? my '65 doesn't have this.
i have replacement polyurethane bushings waiting- but there's only 3 per side. it looks like the '72 spring would need 4?
i have a set of springs that came off a '72.
here's one end of the '72 spring. it looks the same as the '65.
but...the other end- what is this S-shaped thing? my '65 doesn't have this.
i have replacement polyurethane bushings waiting- but there's only 3 per side. it looks like the '72 spring would need 4?
Hotshot
Joined: Oct 2002
Posts: 18,488
Likes: 22
From: The Big, Oregon
That's the flex-o-matic suspension. I had similar questions when I bought my first 67-72 truck, they were a way to get a variable spring rate and do work well but were only used from 67-72. The basic operation is that unloaded the spring is in a constant arch, with the arm off the spring. Once it starts getting loaded down, the arm contacts the spring and effectively shortens the spring, increasing the amount of force it takes to compress the spring.
As i said before, they do work, I like the setup on my F250 especially with a large heavy trailer, but it is a bit different setup and may interfere with the bed crossmembers. The 67-72 trucks had an indent in the bed crossmembers to clear this setup.
As i said before, they do work, I like the setup on my F250 especially with a large heavy trailer, but it is a bit different setup and may interfere with the bed crossmembers. The 67-72 trucks had an indent in the bed crossmembers to clear this setup.
Thread
Thread Starter
Forum
Replies
Last Post
Bobby82490
Brakes, Steering, Suspension, Tires, & Wheels
1
Dec 1, 2008 07:13 AM
