Jag ifs ?
Cargo Master
Joined: Apr 2005
Posts: 3,337
Likes: 165
From: Harpswell Maine
Roy,
I would start by installing the original Jag rear soft mounts first. As a rough starting point, place 3/4" thick blocks of wood between the bottom of the frame rail and the top of the steel surrounding the Jag front donut mounts (see pix)
The rear jag mounts will not be parallel to the bottom of the frame rail. You need to either cut the bottom lip of the frame rail and bent it to the parallel position with the jag rear mount and weld it with a spacer or make wedges to place between the bottom of the frame rail and the rear mounts. I made wedges. The pix does not really show the wedge but in the pix you are looking at the thin edge of the wedge. As you know, the jag cross member needs to be level front to rear to insure front end geometry. I did not make the front mounts until I had a fully assembled truck. I have a slight rake and the 3/4" blocks of wood were just about right for leveling the cross member in the end.
I would start by installing the original Jag rear soft mounts first. As a rough starting point, place 3/4" thick blocks of wood between the bottom of the frame rail and the top of the steel surrounding the Jag front donut mounts (see pix)
The rear jag mounts will not be parallel to the bottom of the frame rail. You need to either cut the bottom lip of the frame rail and bent it to the parallel position with the jag rear mount and weld it with a spacer or make wedges to place between the bottom of the frame rail and the rear mounts. I made wedges. The pix does not really show the wedge but in the pix you are looking at the thin edge of the wedge. As you know, the jag cross member needs to be level front to rear to insure front end geometry. I did not make the front mounts until I had a fully assembled truck. I have a slight rake and the 3/4" blocks of wood were just about right for leveling the cross member in the end.
Thread Starter
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Logistics Pro
Joined: Mar 2012
Posts: 4,390
Likes: 44
From: placer county usa?
bill how thick are the wedges at the thick end and did you put some on top of the lower frame rail under the nuts
also how did you locate the mounts by measurement or other placement/jig?
also how did you locate the mounts by measurement or other placement/jig?
Cargo Master
Joined: Apr 2005
Posts: 3,337
Likes: 165
From: Harpswell Maine
With it all assembled I can't get a good measurement for the wedge. I would estimate it at about 1/4" tapered to about 1/16". I did install a 1/4"thick x 15" long stiffener bar on top of the lower frame rail with nuts welded to the top for the soft mounts. I also boxed the frame forward of the cab mount. I located by original wheel location using a plumb bob while the original axle was still installed.
Senior User
Joined: Mar 2007
Posts: 389
Likes: 0
From: Glendale, AZ
Roy, Here are some of the pics that you wanted to see. The front of the truck has settled down a little bit lower than what it is in this pic. I have the front IFS tack welded in place instead of using the bolt in brackets. I was able to get it lower this way. I am going to take it to a front end shop to make sure that I can get it aligned before I finish welding it in place.
This is the rear suspension with the Jag IRS. I used a kit from Snow White LTD in northern California. It was easy to install and has worked out well. This pic is sitting just a little bit higher than what it will probably end up. I have it set high to allow for the extra weight that I will need to add to the truck before I am finished. If it doesn't sit right, I can adjust the springs to make it right. The top bracket is adjustable.
Your F1 will probably be a little bit different but this should give you an idea of what it will look like.
If you need something else, let me know.
Kevin
This is the rear suspension with the Jag IRS. I used a kit from Snow White LTD in northern California. It was easy to install and has worked out well. This pic is sitting just a little bit higher than what it will probably end up. I have it set high to allow for the extra weight that I will need to add to the truck before I am finished. If it doesn't sit right, I can adjust the springs to make it right. The top bracket is adjustable.
Your F1 will probably be a little bit different but this should give you an idea of what it will look like.
If you need something else, let me know.
Kevin
Laughing Gas
Joined: Sep 2013
Posts: 1,203
Likes: 146
From: Goulburn, NSW
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Laughing Gas
Joined: Jul 2009
Posts: 803
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From: Lincoln CA
jag ifs
Schoo
the jag ifs rubber mount install is pretty easy. I made shims to go between the top of the rear mounts and the frame. I made mine from quarter inch plate with a piece of 1/8th stock cut half the size of the quarter inch plate then welded them together and ground them down to fit between the frame and the mount. So they ended up being around 1/8th at one end and a little over onenquarter one the other end. I made these by hand with a bench grinder and a file as I don't have a milling machine. I used a piece of quarter inch plate to use on top of the bottom portion of the frame rail - to pinch it all together.
I then made the front brackets to fit the front mount. 49 willard helped me out a lot with measurements and photos - thanks much Bill.
Here is a photo of what I have done.
Good luck
Dan
the jag ifs rubber mount install is pretty easy. I made shims to go between the top of the rear mounts and the frame. I made mine from quarter inch plate with a piece of 1/8th stock cut half the size of the quarter inch plate then welded them together and ground them down to fit between the frame and the mount. So they ended up being around 1/8th at one end and a little over onenquarter one the other end. I made these by hand with a bench grinder and a file as I don't have a milling machine. I used a piece of quarter inch plate to use on top of the bottom portion of the frame rail - to pinch it all together.
I then made the front brackets to fit the front mount. 49 willard helped me out a lot with measurements and photos - thanks much Bill.
Here is a photo of what I have done.
Good luck
Dan
Cargo Master
Joined: Apr 2005
Posts: 3,337
Likes: 165
From: Harpswell Maine
Schoo
the jag ifs rubber mount install is pretty easy. I made shims to go between the top of the rear mounts and the frame. I made mine from quarter inch plate with a piece of 1/8th stock cut half the size of the quarter inch plate then welded them together and ground them down to fit between the frame and the mount. So they ended up being around 1/8th at one end and a little over onenquarter one the other end. I made these by hand with a bench grinder and a file as I don't have a milling machine. I used a piece of quarter inch plate to use on top of the bottom portion of the frame rail - to pinch it all together.
I then made the front brackets to fit the front mount. 49 willard helped me out a lot with measurements and photos - thanks much Bill.
Here is a photo of what I have done.
Good luck
Dan
the jag ifs rubber mount install is pretty easy. I made shims to go between the top of the rear mounts and the frame. I made mine from quarter inch plate with a piece of 1/8th stock cut half the size of the quarter inch plate then welded them together and ground them down to fit between the frame and the mount. So they ended up being around 1/8th at one end and a little over onenquarter one the other end. I made these by hand with a bench grinder and a file as I don't have a milling machine. I used a piece of quarter inch plate to use on top of the bottom portion of the frame rail - to pinch it all together.
I then made the front brackets to fit the front mount. 49 willard helped me out a lot with measurements and photos - thanks much Bill.
Here is a photo of what I have done.
Good luck
Dan
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Logistics Pro
Joined: Mar 2012
Posts: 4,390
Likes: 44
From: placer county usa?
49willard said use a 3/4 block and I pit some measurement and used a level and it was real close to 3/4"
Thanks to all for your input
Cargo Master
Joined: Oct 2010
Posts: 2,091
Likes: 599
From: Lancaster, CA.
That depends on what year truck you have 53-56, yes it needs to be moved forward. 48-52 Im not sure, but I don't think so.