Projects Franklin quickchange.

Anybody running a large quick-change in a model A? How did you mount it? I would like to run a buggy spring , but don't have to. Thanks

 

You basically get to choose between a model A spring and cross member or a pair of coil overs on a model A cross member. Most of us choose leaf spring with A-bone cross member. I did for my 34 ford frame after removing the original 34 cross member.
The photo is of a 34 crossmember with the center part of a model A cross member spliced in.

 

It's "Frankland", and if it's anything like the one in my dirt modified, it would probably be a bit much in a Model "A" (depending on what engine is in it).

 

The Frankland is quite large, based on 3/4 ton truck parts. Many are mounted like the one pictured above with the spring behind using either an A or a T spring. The T spring is the right width to attach to the V8 rear end spring perches that are spring behind. Starting in 37 the spring perch became part of the housing end giving you the option of swapping the bells side to side and creating a spring ahead design. I used the spring ahead design when I built a sport coupe for a friend of mine.

I used an 8" rear end and shortened the frame by 8 1/2" moving the spring cross member forward. I used the T spring because it is the right width not to interfere with the backing plates. If using an original T spring be aware that almost every on has the third leaf down broken. Not sure why but of the 10 I have only one isn't broken. I also used a 37 front wishbone and ball to locate the rear end. I cut the forged end of the bones and then split the bones down the middle of the weld and cut slots in the other side. I tapered a piece of 1/4" flat bar and welded it to the forged ball end and then welded the bones to the flat bar. At the back I created a mount much like the 35-36 rear radius rods have to attach it to the rear end.

 

Coilovers with 4 bar and full length panhard bar. Only thing I would do different is triangulate the 4 bars.

 

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Your u-bolts are installed backwards

 

You can buy or fab mounts for either spring style. A full size Frankland (3/4 ton) is pretty massive. But, that has been done many times and it will work just fine.
For a more traditional look, look at the link below. Best of both worlds.

Bruce

 

They had to be installed that way to not have the nuts and plates hit the rear end. Yes they hold the spring properly. The third leaf down was broken so I removed it and doubled up a couple of the lower leaves.

 

I don't think the rear end plants hard enough with parallel bars.

 

thank you

 

Dean,
When you say triangulate the bars, are you meaning upper and lower bars closer together at the front or left and right side bars converging?

My take was that sdluck was thinking the latter and that you were answering as the former. Maybe I am the one that misunderstood.

 

Could you clear that up please? Also what width is your quickie?

 

Sorry,
When Dean said he would triangulate the 4 bar if he were to change anything, I took it to mean that he would angle the bars in toward the drive shaft. Probably the most common configuration is to have the two lower bars converge toward the front while the top bars are angled from the center of the differential housing outwards toward the frame rails. This may eliminate the need for a Panhard bar.
When you asked, "no panhard bar?" This is what I thought you were asking.

When he answered, "I don't think the rear end plants hard enough with parallel bars." I thought he misunderstood. I don't believe that angling the bars, in that way, provides any more 'bite'. But, if you angle the top bars down as in a 4 link, you can increase the downward force on the tire.

I was trying to get clarification for you, but it seems I added to the confusion. And maybe I was the only one that is confused.
I'll look for some pictures or diagrams if I am confusing y'all.

 

Thank you that would help.

 

In my experience car-for-car, P&J ladder bar suspension plants harder than parallel 4 bars. Triangulated 4bar, I don't know.

 

sdluck,


This is what I thought you were asking about


This is what I thought Dean was referring to

 

The top picture is what I was referring to,thanks.

 

What width is your quickie?

 

54" axle flange to flange.

 

Model A crosmember reverse eye T spring and triangulated ladder bars is how I did it.

 

That is how my Pont/olds rear is mounted now,is this a model a frame?Is the model t spring narrower? Have you driven it?

 

Thank you

 

What are you running for wheels and tires and what offset are they?

 

16 X 8 Vintage Wheel Works with 275/65 R16 BFG's. I believe the off set is 3 3/4".

 

Thank you

 

I used 36 wishbone and an A spring

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Yep drives great I also added a panhard bar not sure if I needed it being triangulated.
Not sure on the width difference between A and T springs I chose it to get the heigth I wanted.

 

Thanks for the photos.