I've been trying to get some information about the Jaguar suspension setup in the 70's F100. I see people using the older xj6 stuff. I can't seem to find anyone talking about the XJS up to 1996 or 97? These are supposed to bolt right into the older xj6's. So they will go right into one of our 1970's F100's.
anyone out there with information. Or pictures of this install??

 

1988 up jag xj40 platform IFS is very different than the older versions and is not as easy an install, IRS I have no idea but someone here will.

 

[QUOTE=drptop70ss;17130211]1988 up jag xj40 platform IFS is very different than the older versions and is not as easy an install, IRS I have no idea but someone here will.[/QUOTE

. Drptop...
. That's why I said 93 thru about 98 XJS. The xj40 is way to much work. I believe the xj40 has struts? Not really sure.
. But , the xjs thru 98 is the exact same setup as the old style xj6. The only difference is that the xjs has outboard disc brakes, sealed 1 pieces bearings. Better seals. Slotted disc Rotors. There's more I just can't think of it right now.
. Some people are putting the xjs cradle and everything into the old xj6. They like the cars. Just not the old suspension. So if they are upgrading. We should start with the better xjs. It cost more. But, You don't have to rebuild it and you end up with better brakes and handling. It's just a given....
. Anyone??

 

1996 was the last year for the XJS the IFS is a perfect fit for the F1 but requires more fab work on the F100 because of the wider frame.

 

Have you thought about using a 84-96 Corvette IRS? They're cheap and the right width and easy to find parts. I'm doing one in my 53.

 

The c4 are very wide ( 84-88 1" narrower ) making rim choice limited as you need to use corvette backspacing but other than that fit quite nicely .

 

As far as I know the XJS front suspension is not an upgrade from the older XJ6, only differences I know of are stiffer springs for the heavier engine and a different design steering rack that started around 1992. I have one of the newer racks on the shelf that had been put into a 1986 XJ6.
I would rebuild the IFS regardless of what it came from, the parts are cheap and upgrades like polyurethane steering rack bushings are a nice improvement over stock.
​​​​​​​ Does anyone know of any design changes other than the rack?

 

What year is your truck? Never mind I see by your profile you have a 1973 F100. I don't mean to be rude, but you are in the wrong section. When you replied to a 13 year old post yesterday I suggested that you start a new thread, tell us about your truck and post some pictures. You didn't follow that advise, instead your trying to drag information out of of folks for an application that for some reason you don't want to tell us. This is the 1948-1956 group, your 1973 is Nothing like our trucks. I'm currently working on a Jag IFS in a 1951 F1, but I have no idea what a 73 is like. I do know that a 1953-1956 is different from mine because it is a later model. There were several model changes between 1956 and 1973. I have no idea if the Jag IFS swap has been done in that late of a truck, but the chances of finding somebody in this group that has done it are pretty slim, if at all. Best advice is to ask your questions in the 1973-1979 group https://www.ford-trucks.com/forums/forum38/

 

The newer XJS up to 96 is a direct fit & upgrade for the older xj6. Better bearings outboard brakes. drain plug. Plus a few other things. But the mounts line up perfectly for the swap from old style xj6 to the new xjs. The outboard brakes of coarse is the rear suspension. The front is just a better handling setup. But the front is a direct bolt in replacement setup.
​​​​​​​I think the site that does this out here in California is Jaguarspecialties.com

 

Harley...
. How wide is your older f1 frame. You say the xj6 is a bolt in or weld on cradle to your truck.
I'm really interested in knowing how wide your frame is??

 

How is the XJS a better handling setup? It uses the same parts as an XJ6 including ball joints, control arms, bushings, etc..rack was redesigned due to leak issues with the Adler rack but not for steering ratio. So far all of my XJ6s from 1981 up all have tapered roller bearings, so not sure where the better bearing statement comes from.
Frame width doesnt matter, rails can be pinched, spread, or modified as needed. All that matters with an IFS swap is a track measurement that works with whatever you are building. There are many, many threads here and on other sites showing jag installs.
In the end these are pickup trucks and I seriously doubt you could tell the difference between the different jag setups. use what you can get your hands on and just do it, you could of already been done!

​​​​​​​also I think my 51 frame 34" wide but it has been awhile since I measured, but just about anything can be made to work.

 

. My 73 frame is 34 inches wide. I'm not sure because I haven't measured yours. But I think they are the same.
. XJS...... better rack, better bearings,,, much better brakes. 4 piston & Slotted rotors.
. I think you should use what ever setup you like out of any year you like. I'm just hear making statements that I believe. Seems you are here to make sure .... Never mind. I'm sounding like you,,, Sorry.
. Good luck with your build.

 

The frame on the 51 F1 is 34" however the front section of the frame narrows after the transmission crossmember. At the point of the front axle/suspension it is 32" wide, which allows the Jag install without modification. The later trucks with the wider frame require cutting or notching the frame.

 

yes 48-52 is 32 in front and 34 in back.

 

32" for my 51 it is, fits perfect.



Here is one I put in my 41 cadillac after major frame rail surgery..now it fits perfect