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Unread 03-28-2007, 01:02 PM   #1
Tractor Boy
Registered User
1977 CJ5 
 
Join Date: Feb 2007
Location: Arlington, Texas
Posts: 116
Disc brake conversion question

So I got the donor axle out of a 78 that turns out to be the 7/8" rotors. Just about everything comes off smoothly except for the spindles that are like welded on from 30 years of rust. Been soaking them with pb with no luck so far. Now I'm wondering if my wheels are going to clear the rotors. I have the big drums on the front. What do guys think? Is this a great forum with priceless information or what?

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Unread 03-28-2007, 02:47 PM   #2
John Brereton
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Join Date: May 2005
Location: New Castle, Delaware
Posts: 137
Quote:
Originally Posted by Tractor Boy
So I got the donor axle out of a 78 that turns out to be the 7/8" rotors. Just about everything comes off smoothly except for the spindles that are like welded on from 30 years of rust. Been soaking them with pb with no luck so far. Now I'm wondering if my wheels are going to clear the rotors. I have the big drums on the front. What do guys think? Is this a great forum with priceless information or what?
The way to get the spindles off is to beat the snot out of them with something hard, but not harder than the spindles. You don't want to dent them up. Bang them one way, and then the other. Eventually you'll start to see a parting line between the knuckle and the spindle. Once you see that, take a small flat head screw driver and tap it into the parting line to act as a wedge. Then beat the spindle the other way (against the screw driver). When you see a parting line form on the other side, insert another screw driver into THERE. Repeat the process, changing to larger screw drivers as necessary, and the spindle will walk off.

Another way is to take a brass drift pin and band at the back of the spindle (through the back of the knuckle). This also works but it is a pain to insert the big brass drift pin.

There IS a difference between drum brake wheels and disc brake wheels. You might get lucky with '78 since it was a transition year for Jeep, but then again, you may not. You'll have to try them out.
__________________
What's left of a '79 CJ5
3 - 4" total lift
4.88 gears in a Dana 30 and off center ff Dana 44 with disc brakes
258 with TFI /T18 /D18 drive train with Saturn O.D.
33 x 12 DC Mud Country Radials
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