Who is using Grand Cherokee rear disc on 8 3/4

[RIBOATSERVICES]

Question for those that are using the GC backing plates on a 8 3/4. I have the backing plates, new style green bearings with snap ring and retainer plates for the bearings and after mock up with the Liberty calipers and rotors everything lines up great. Question is, are you guys just butting the backing plate up against the bearing snap ring ? I`m concerned about the somewhat sloppy fit between the backing plate and snap ring. Aren't you guys worried about that super thin snap ring working its way through the backing plate and losing an axle ? I can see bolting the bearing retainer plate on the outside of the backing plate as kind of a safety but if that snap ring gets through the backing plate im not sure the bearing retainer plate would do much good. Are you guys using a larger snap ring on the bearing or just trusting that cheesy thin snap ring to hold it all together ? Thanks for your help!

 

[Dana67Dart]

Mopar action mag, October 2018 has part 2 of a 2007 and down Jeep liberty rear disc swap to 8 3/4 (65 to 74) 5x4.5

you might need to find old copy (saw some online recently)

 

[1971 CY Dodge Dart]

I have it.

 

[RIBOATSERVICES]

Maybe you could share some info

 

[67Dart273]

Mopar action mag, October 2018 has part 2 of a 2007 and down Jeep liberty rear disc swap to 8 3/4 (65 to 74) 5x4.5

you might need to find old copy (saw some online recently)

This info is not available online?

 

[S'cuder]

The Mopar Action article was photographed and published on the forum. It uses tapered bearings, not Greens, though. It's designed for B/E-Body 8.75" axles, which have a different brake spacing than A-Bodies. It also also requires some modifications of the caliper bracket or custom axles

I believe adapting these brakes are much closer to a bolt on with 8.25" axles.

There are a few threads on FABO detailing member's swaps. Searching for these will turn up most answers OP is seeking.

 

[junkyardhero]

This info is not available online?

it is.

and it's been covered here pretty extensively.

 

[RIBOATSERVICES]

it is.

and it's been covered here pretty extensively.

Thanks, been searching the forums

it is.

and it's been covered here pretty extensively.

Thanks, been searching the forums pretty hard but haven't seen anything on modifying the CG backing plate or snap ring when using the 8 3/4. Hoping someone who has done this with the 8 3/4 it will chime in.

 

[junkyardhero]

you have to machine part of the backing plate down to either .125 or .100(?) in order for it to work on the 8.75

as mentioned above, i believe this only works with the big bolt pattern axle offset.

 

[S'cuder]

Thanks, been searching the forums

Thanks, been searching the forums pretty hard but haven't seen anything on modifying the CG backing plate or snap ring when using the 8 3/4. Hoping someone who has done this with the 8 3/4 it will chime in.

This thread covers a lot. The magazine article was removed, probably due to copyright infringement. You can still get a lot from the thread.

Liberty Rear Disk Brakes for A-Body | For A Bodies Only Mopar Forum Liberty Rear Disk Brakes for A-Body

 

[RIBOATSERVICES]

This thread covers a lot. The magazine article was removed, probably due to copyright infringement. You can still get a lot from the thread.

Liberty Rear Disk Brakes for A-Body | For A Bodies Only Mopar Forum Liberty Rear Disk Brakes for A-Body

Thank you, thats some helpfull info. Still hoping for someone to chime in thats actually done the coversion to the 8 3/4.

 

[S'cuder]

Thank you, thats some helpfull info. Still hoping for someone to chime in thats actually done the coversion to the 8 3/4.

@RLF Cuda , the original poster in the thread linked did. Also @TALK ABOUT IT is the one who did the swap that was the inspiration for the article. But he hasn't been on FABO for a few years.

 

[Dana67Dart]

Back in the day I did a Ford 9" rear disk brake swap from a Versailles.
The Versailles had a cast/forged bracket that bolted to a bracket that was part of the bearing retainer give or take.

I took a drum backing plate and cut out the center then welded flat bar stock around it to form a surface to bolt on the cast/forged bracket to. It was simple and worked like a charm.

The modern rear disks have the drum parking brake so a backing plate is needed to mount the disks