As mentioned yesterday I have to make the main subframe attachments removable as I need to locate the top of the holes which is where it bolts up to the main chassis rails in the car. When the jig is complete the idea is to lift the factory cradle straight up and off the jig so permanent mounts would stop me doing that.
To make it removable I am using some bolts. I used some slightly smaller box section that slides into the 30mm stuff I have been using. To make the fit really tight I put some small tacks with the welder first and then filed them down until the fit was very snug.
Then slid it inside the larger box section and did another tack to hold it firm while I drilled some holes for the bolts.
Same thing on the rear of the frame just with taller posts.
With those four points located it was time to lift the cradle off the jig and finish some of the welds I could not reach with the cradle in place. This is where I had some trouble, I could not get the cradle off as it was stuck where the rear diff mounts are recessed into the frame a little. I'm not too surprised this happened as its my first time doing anything like this.
After some thought I decided to cut one of the diff mount post off, it was the only solution really. I used a hacksaw as the blade is very thin and my grinder could not cut it in one clean pass.
So I welded that back on, it will drop the hole position less than 1mm which is ok as the diff mounts are slotted anyway. Then I finished the rest of the welds and the jig was finished. I will put a coat of paint on it when I get a chance.
Joel.
