Redrilling a Jag IFS

Well the ***le pretty much says it all. Could a jag IFS be redrilled to 5 x 5 bolt pattern to match my 57 pontiac? I could get a front end and install it and have power steering cheaper than rebuilding and converting my original one if it could have the factory bolt pattern. Thanks in advance.

 

I just got done doing a BP conversion, but it was the other way......from the Jag 4.75 down to a 4.50 in order to use early Mopar wheels.
The main concern is strength. You have to decide if you feel that moving the hole pattern in 1/4" on the radius will not cause future problems, or impair the integrity of the hubs.
Because the existing holes that the wheel studs use in the Jag hub are a bit over .500, you'll have to go to about Ø.765 to clean 100% (although there's no rule that it must clean up completely)
For mine, I first plunge-milled & bored out the hubs in the new pattern from the hub backside.. Spot-faced to Ø1 + to make them all the same relative thickness through the hub. Then I made "hat bushings" out of Ø1" CRS and provided about .003/004 interference fit for the straight-knurled wheel studs. And left about .005 to remove for final fit into the hub.

These bushing have about a 5/32" (.156) head on them....but that could be most anything. (Because there would be a substantial change in length, and the existing Jag wheel stud heads are of an odd design, I ended up using wheel studs from an Explorer)

Pressed those together.

Then turned the bushing diameter for a .001/002 interference with the hub and pulled them into the hub using a lug nut and hard washer. When they were only about 1/4" into the hole, I put a few drops of Loc***e 609 on the "shank" before pulling them all the way in. It's important to get the head of the bushing bottomed out on the hub's spot-face (done previously), so that later on, you're not moving the stud/bushing in or out relative to the hub.

The Jag IFS that I used was from an '86 XJ6, the rotors are bolted in from the inboard side; so there are actually 10 holes per hub. Not knowing if the Jag you're considering using has a different method of rotor attachment, you may be able to just put the new holes in-between the existing 5 holes........all depends on how it's made.

gatz

Before installing the studs, I also turned the Jag hub wheel locating diameter down so that the Mopar wheels would fit. IIRC, had to take .080 off the diameter. See last pic

 

Very nice work. what did you do with the rotor? Just redrill the holes? Interested in doing another set? I want the Mopar/Ford pattern with the Jag front end. Thanks. Looks great.

BART

 

Bart, sent you a PM

 

The rotor mounts behind the hub and has no affect on the wheel bolt pattern. No mods necessary.


To the OP: Very nicely done and well presented. Thank you for posting.

 

Second gen Camaro/Firebird 10-bolt rear is a bolt-in and would give you the same bolt pattern as the Jag in back, plus you could find brake parts at any parts store.

***uming you can find one in a you-pick yard, I can't think it would cost more than $100 or so.

 

It would not make an acceptable subs***ute for a Jag independent FRONT suspension setup. Too hard to steer.

 

Wise guy, eh?

Think the suggestion was whether it's easier to raise the bridge or lower the river, if 5x5 in front isn't practical then 4.75 in back certainly is...

 

My take on this is he suggested changing out the rear end so the bolt pattern matched the Jag so no mods needed to the jag hubs.
I could be wrong though.

 

Hi Gatz

I'm doing a JAG frontend on my 53 Ford truck. I picked up a complete frontend from an '86 XJ6 and I would like to run the 5 X 4.5" bolt pattern and I saw the posting you had put up for just this job. Is this something you can do for others if they are interested? Please let me know. Thanks

 

I have the same problem, going to run 1" thick adapters.

 

A friend just did this to his 57 F100 with Jag F/E. The hubs had to be machined down from 5x4.75 pattern to smaller 5x4.5 pattern. From memory he used larger 1/2" diameter wheel studs. No adapters required which are illegal here anyway. You then need to use the correct diameter wheel rim and offset so nothing fouls. I can't recall if he had to have the wheel centres machined to fit the Jag hub?

 

gatz I need the same thing done to 85 xj6 front hubs. Would you be interested in doing the same thing for me?