PDA

View Full Version : CHASSIS, Rear Axle Bracket for Rat Rodder


C9
12-09-2004, 09:50 AM
I think this is what you're looking for.
The bracket is a SoCal item.
3/8" steel and it should be easy to make, but the price is reasonable.

It comes as a one piece unit and in my case was slid over - after some grinding to fit* - the rear axle housing that was minus the axle flanges at the time.
If the flanges are on the housing, cut the bracket so you can install it as a two-piece unit.
Just takes a little extra welding.

The main leaf is a SoCal item, but I don't think they sell the main leaf by itself any more.

You may be able to have a local spring shop make you up a leaf to fit the spacing of the rear axle brackets.
The brackets are spaced 44" apart as per SoCal recommendations.
Fwiw - the rear end width in this car is 56" outer brake drum to outer brake drum. (Which is the commonly accepted way to measure them.

Be sure to take the pinion angle into account before tacking or welding.
Note as well the triangular gusset to the inside of the bracket.

You won't have to make up a spring center mount like I did if you use a piece of rectangular tubing that the spring shackle will fit over.
I'll post another pic of the spring center area and note that the 'crush tubes' are sunk into the crossmember a ways.
This was done to gain an additional 1/8-3/16" clearance at the front of the rear crossmember for the Panhard to clear.


*The grinding alluded to was on the inside of the brackets axle cutout.
Done because of the not so-perfect roundess of the Ford rear axle housing and the accurately sized hole of the SoCal bracket.
Even so, the bracket fits very precisely and if you didn't get too crazy with the grinding a little tapping with a soft hammer will knock it into place and it will remain there for welding.

One small hint - once you're set up with pinion angle etc. - is to tack the bracket into place with 2-4 strong tacks and leave it like that until you're absolutely sure that's where you want it.

C9
12-09-2004, 10:03 AM
Here's a pic with a slightly different angle from the one posted the other day.

This one shows the spring center mount in a little more detal.
More than likely one or two leafs will be added to the spring pack and an aluminum shim added between spring pack and the 1/4" steel pad welded to the underside of the rear crossmember.
Nylocks will be used as well, regular nuts are used during the building process.

The horizontal tube welded into the crossmember on the bottom left side is the Panhard mount.
Done like this to bring the Panhard as level as possible and another part of the "making things clear" bit.
The Panhard is mounted on a raised bracket on the right side.
The Panhard on this car is not as long as I'd like it to be, but it's longer than some of the very short commercially available ones.

The crush tube sunk into the middle right side of the crossmember is the upper mount for the rear shock.
There is a similar piece on the left side.

rustymetal
12-09-2004, 10:06 AM
hi c9 would you have a pics of your frame and crossmenber and what was your pinon angel.
thanks

flt-blk
12-09-2004, 10:27 AM
What's the mandrel bend tube in the center for?

C9
12-09-2004, 10:41 AM
Pinion angle is 1 degree down.
That's compared against the trans tailshaft angle and not from a level reference such as a garage floor.

1-2 degrees down is the usual recommendation for 4-bars.

This is the only bare frame pic I have right now - I'm in between finding and recovering pics from my other computer and busy doing other stuff.
Not to mention that the frame build wasn't documented as well as it should have been.... http://www.jalopyjournal.com/ubbthreads/images/graemlins/tongue.gif

C9
12-09-2004, 10:47 AM
[ QUOTE ]
What's the mandrel bend tube in the center for?

[/ QUOTE ]

Good eye flt-blk.
You're the first person to ask that question.

I've posted this pic before as well as other angles showing the bent tubing and surprising to me, no one ever asked about it.

Anyhoo . . . it's the parachute mount for when the car was gonna be a lakes runner.
It's not in the way and I may put it back on the chassis.
Just in case . . . ya know? http://www.jalopyjournal.com/ubbthreads/images/graemlins/grin.gif

C9
12-10-2004, 10:25 AM
BTTT for Rat Rodder - the guy, not the group.... http://www.jalopyjournal.com/ubbthreads/images/graemlins/grin.gif

Rocky
12-23-2004, 12:48 AM
Holy crap, Jay! Your frame is fully boxed and has a custom, tubular X-member in it. That's gotta be one stiff frame. I love it. I'm planning on a similar approach to modifying the stock T-frame for my untra-lightweight lakes modified project....
nice stuff!