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Re: Grand Cherokee Discs on 8 3/4 Rear?
[Re: MCTPhoenix]
#57435
04/28/08 08:26 AM
04/28/08 08:26 AM
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Joined: May 2004
Posts: 4,920
Joplin, MO USA
Robbins
master
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master
Joined: May 2004
Posts: 4,920
Joplin, MO USA
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Quote:
Quote:
Also I forgot to mention when machining the step for the snap ring on the green bearing I also had the make the hole in the center of the caliper bracket a little bigger to go around the green bearing itself some.
Lee, If you didn't use the green bearing would you have to machine the step? I'm going to try to locate some used parts and try this. Sounds like if the standard bearings don't need the step for the snap ring I may only have to open the hole a little for the bearing clearance?
Well I haven't tried it with out the green bearings, but you need to be careful here. If you don't machine the caliper bracket to the thickness of the old drum backing plate then your axle may not be fare enough in the third member spline wise. The caliper bracket is really thick. Really for the 8 3/4, ideally you would want the housing narrow up so that once the caliper bracket was pushed on to the five studs on both sides you would have the exact width of a stock housing(what ever you working on, like A -body, B-body and so forth) as far as width is concerned.
That's why the 7 1/4, 8 1/4 and the 9 1/4 with the 5 on 4 1/2 pattern with 2 1/2 shoes work better cause these caliper bracket slide over the housing end and have nothing to do with the axle itself. As far having to bolt to the out side of the housing. They are held in with C clips.
Hope this makes sense. I realize that pictures are 1000 words, but I don't have any to be able to post.
Moparlee
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Re: Grand Cherokee Discs on 8 3/4 Rear?
[Re: Robbins]
#57436
04/28/08 10:28 AM
04/28/08 10:28 AM
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Joined: Oct 2003
Posts: 3,698
NE Oklahoma
Von
master
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master
Joined: Oct 2003
Posts: 3,698
NE Oklahoma
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As far as cost, if you dont have core calipers this swap isnt much cheaper than some of the kits available.
I paid 115 for the brackets, most likely from the say place Robbins got his brackets in Branson.
The core charge on the calipers is around 75 a caliper plus the price of new calipers, around 60 a side. Rotors arent too bad, around 25 or so a side.
I havent used the brackets yet, because I didnt like the fact the brackets pulled the axles that much farther out of the housing. But, I can see with green bearings and by machining for the snap ring that issue should be taken care of.
72 RR, Pump gas 440, 452s, 3800 lbs, Corked, ET Radials,. 11.33@117.72.
Same car, bone stock 346s, 9.5 comp, baby solid. 12.24@110.
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Re: Grand Cherokee Discs on 8 3/4 Rear?
[Re: Von]
#57437
04/28/08 10:35 AM
04/28/08 10:35 AM
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Joined: May 2004
Posts: 4,920
Joplin, MO USA
Robbins
master
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master
Joined: May 2004
Posts: 4,920
Joplin, MO USA
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My cousin got all of it for like $60 in Branson. I got my stuff that's on the car now from two different places in Joplin. So.......ya, I'm running the used calipers that I bought in Joplin. I guess roundie rounders have been welding the brackets on dirt cars for awhile now on phord 9in's.
Moparlee
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Re: Grand Cherokee Discs on 8 3/4 Rear?
[Re: Von]
#57438
04/28/08 10:48 AM
04/28/08 10:48 AM
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Joined: Jan 2003
Posts: 8,144
Arkansas
340727dart
master
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master
Joined: Jan 2003
Posts: 8,144
Arkansas
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I've got less than $200 in my conversion. That includes the cost of rebuild kits for the calipers, along with new rotors, pads and brake hoses.
Your life is not my fault.
My life is none of your business.
Speech is free only if you agree with those in control.
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Re: Grand Cherokee Discs on 8 3/4 Rear?
[Re: Robbins]
#57439
04/28/08 10:49 AM
04/28/08 10:49 AM
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Joined: Oct 2003
Posts: 3,698
NE Oklahoma
Von
master
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master
Joined: Oct 2003
Posts: 3,698
NE Oklahoma
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Quote:
My cousin got all of it for like $60 in Branson. I got my stuff that's on the car now from two different places in Joplin. So.......ya, I'm running the used calipers that I bought in Joplin. I guess roundie rounders have been welding the brackets on dirt cars for awhile now on phord 9in's.
I sure wish I could have got all of the parts for even $100. I was referred to a Jeep place in Branson that had supposedly sold the parts for cheap. Well I didnt get the parts cheap. In fact they made sure and pull the backing plate and any parking brake parts off of the brackets. Jee whizz. 
I dont know why you would use the JGC brackets and dang sure cant see why you would weld them on a 9 inch for a dirt car. The cheap Afco weld on brackets are only 25 bucks and the calipers are dirt cheap, around 15 a side. At least that is what I and alot of other guys used on dirt cars with 9 inchers.
72 RR, Pump gas 440, 452s, 3800 lbs, Corked, ET Radials,. 11.33@117.72.
Same car, bone stock 346s, 9.5 comp, baby solid. 12.24@110.
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Re: Grand Cherokee Discs on 8 3/4 Rear?
[Re: Robbins]
#57441
04/28/08 11:17 AM
04/28/08 11:17 AM
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Joined: Jan 2004
Posts: 1,230
Pittsburgh, PA
wayfarer1
pro stock
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pro stock
Joined: Jan 2004
Posts: 1,230
Pittsburgh, PA
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I just bought a whole rearend from a 95 Grand Cherokee complete with suspension and disc brakes from a private owner for $100.00 in Ohio. I found the deal on Craigslist.
If the calipers look good I am going to use them as is and just replace the pads. I will have the rotors turned, so the cost will be relatively low.
With the green bearings, there is no need for the inner axle seal. If this seal is removed would that allow the axle to move into the housing further thus allowing more clearence for the backing plate and bracket?
I just talked to someone at Strange Engineering and the Green RP 400 bearing does not use the snap ring. The retaining plate is attached to the bearing which should allow the bearing to fit tighter into the housing.
Joe
Last edited by wayfarer1; 04/28/08 11:41 AM.
Current Project: 72 Roadrunner 340/727/Petty Blue/White Roof Strobe Stripe/Black Bucket Interior
71 Demon project
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Re: Grand Cherokee Discs on 8 3/4 Rear?
[Re: wayfarer1]
#57442
04/30/08 08:26 AM
04/30/08 08:26 AM
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Joined: Jan 2004
Posts: 1,230
Pittsburgh, PA
wayfarer1
pro stock
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pro stock
Joined: Jan 2004
Posts: 1,230
Pittsburgh, PA
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Moser also sells a bearing set without the snap ring and the part number is 9400RP. They are available from Summit for $67.99 a pair.
Using these bearings should eliminate the need to machine the step into the backing plate for the snap ring.
Joe
Last edited by wayfarer1; 04/30/08 08:28 AM.
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Re: Grand Cherokee Discs on 8 3/4 Rear?
[Re: DoctorDiff]
#57444
04/30/08 09:47 AM
04/30/08 09:47 AM
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Joined: Jan 2003
Posts: 16,376
dogdays
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 16,376
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Re: Grand Cherokee Discs on 8 3/4 Rear?
[Re: BlakDak]
#57448
07/09/08 07:51 AM
07/09/08 07:51 AM
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Joined: May 2004
Posts: 4,920
Joplin, MO USA
Robbins
master
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master
Joined: May 2004
Posts: 4,920
Joplin, MO USA
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I haven't done that part yet. My car is a standard and I really would like a parking brake. I've gotten all the stuff on the rear end for it, but haven't installed them yet.
Moparlee
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Re: Grand Cherokee Discs on 8 3/4 Rear?
[Re: Robbins]
#57449
07/09/08 08:39 AM
07/09/08 08:39 AM
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Joined: Sep 2003
Posts: 847
Parsons (SouthEast) Kansas
funkyjbp
mopar addict
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mopar addict
Joined: Sep 2003
Posts: 847
Parsons (SouthEast) Kansas
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lee, jeff from parsons here. i met you at mopars invade mokan a while back. i go to joplin frequently. any chance i could come by and check out the disc swap in person? it would be awesome to see this up close and personal. i have several worthy disc swap candidates: 77 shortbed with 3.21 sure-grip 8 and 1/4, a few 8 & 3/4 SGs, and a 3.55 9 & 1/4 SG for my 92 truck. i will be sourcing a few GC rears systems in the meantime! jprice@vikingnet.net or 620-820-3793. thanks and later, jP in KS.
71 SWB, 413
77 SWB, 318
92 SWB, 5.2 magnum
79 Macho Short bed, 318
03 stratus coupe R/T
too many others not on the road!
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Re: Grand Cherokee Discs on 8 3/4 Rear?
[Re: funkyjbp]
#57450
07/09/08 08:48 AM
07/09/08 08:48 AM
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Joined: May 2004
Posts: 4,920
Joplin, MO USA
Robbins
master
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master
Joined: May 2004
Posts: 4,920
Joplin, MO USA
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Both you & moparjamie are welcome to come over anytime. I do have an extra set also.
Moparlee
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