79blueghost
Well-Known Member
Would it be beneficial to do a disc brake conversion video for the site
Going junkyarding today rear disc brakes
- Thread starter 79blueghost
- Start date
I say lots of pictures with commentary or a video would be nice.
BudW
BudW
79blueghost
Well-Known Member
Went to pull apart today to get my rear disc set off of a 98 Jeep Grand Cherokee or a ZJ took the rear axles out of the rearend took the brake caliper brackets off and calipers and rotors. The axles are held in with c clips. The total amount for parts was 110.56.
79blueghost
Well-Known Member
More pictures are coming
Oldiron440
Well-Known Member
Is it a 8 1/4 axle assembly that the parts came from?
Raff
Well-Known Member
Lots of pics and details would be great.
Mopar Action magazine just did a two part rear disc conversion story recently. I think they used Jeep Liberty parts.
Mopar Action magazine just did a two part rear disc conversion story recently. I think they used Jeep Liberty parts.
80mirada
Well-Known Member
Mine came off of a 96 Grand Cherokee Dana 35 iirc. A light grinding on the center bore of the bracket is all it took for them to go on my 8.25. Liberty brakes shouldn't require the grinding
MBDale
Well-Known Member
Yahhh, rear disc f-body.
79blueghost
Well-Known Member
Yes it was a 8.25. I am wondering if the axles out of that rear end will work in mine with the carrier if it was a SG.
Mr C
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That article was for the 8.75 diff...that's all they care about in those magazines.
Oldiron440
Well-Known Member
I've been into mopars for 35 years this forum is the only place I've seen that a 8 1/4 axle was worth concittering in a performance aplacation. The 8 3/4 is the standard performance axle for mopar unless your making serious power then it's the Dana 60.......
I have scraped and given away LS 8 1/4s, there's no value in them in these parts.
I have scraped and given away LS 8 1/4s, there's no value in them in these parts.
The ’96 Grand Cherokee (’93-98 ZJ) either uses a Dana 35 or a Dana 44 rear differential (the only two choices) – and both are nothing like an 7¼” or 8¼” Chrysler differential.
The Dana 35 has an almost round cover and ring gear is 7.5” (191 mm)
Dana 44 has a square looking cover and ring gear is 8.5” (216 mm)
I do not “know” enough about either the Dana 35 or 44 to know if the end flanges are the same as the FMJ differential end flanges are. Pictures show an offset 4-bolt flange – that looks like might match the 5-bolt flange that Chrysler uses – but I do not know for sure.
I do know the Jeep differential housings are the same if using drum or disk brakes – so this flange would be the same on all Jeep ZJ’s, as well.
This is a picture of a 10” rear drum backing plate that fits ’93-98 ZJ (Grand Cherokee’s). I hadn’t looked at the ’99-04 WJ’s to see if any differences there, yet.
The yellow circle would be where the fifth stud is located at on FMJ's.
This is a gasket that shares the same outline of the flange that FMJ’s use. The flat part goes to the top.
I’m eager to see pictures to see how this works out – for this might be a big plus for us (. . . or a big minus).
Some of the Grand Cherokees use an aluminum differential housing (Dana 44) – which I think would be fun to play around with (to reduce the un-sprung weight – for road racing) – but not going out of my way to look for one.
BudW
The Dana 35 has an almost round cover and ring gear is 7.5” (191 mm)
Dana 44 has a square looking cover and ring gear is 8.5” (216 mm)
I do not “know” enough about either the Dana 35 or 44 to know if the end flanges are the same as the FMJ differential end flanges are. Pictures show an offset 4-bolt flange – that looks like might match the 5-bolt flange that Chrysler uses – but I do not know for sure.
I do know the Jeep differential housings are the same if using drum or disk brakes – so this flange would be the same on all Jeep ZJ’s, as well.
This is a picture of a 10” rear drum backing plate that fits ’93-98 ZJ (Grand Cherokee’s). I hadn’t looked at the ’99-04 WJ’s to see if any differences there, yet.
The yellow circle would be where the fifth stud is located at on FMJ's.
This is a gasket that shares the same outline of the flange that FMJ’s use. The flat part goes to the top.
I’m eager to see pictures to see how this works out – for this might be a big plus for us (. . . or a big minus).
Some of the Grand Cherokees use an aluminum differential housing (Dana 44) – which I think would be fun to play around with (to reduce the un-sprung weight – for road racing) – but not going out of my way to look for one.
BudW
80mirada
Well-Known Member
I have already done this swap, the bolt pattern is the same. The center hole may need some light sanding/grinding to fit the housing.
79blueghost
Well-Known Member
This is my first swap and I am learning as I go I don't know the specifics other than what I've seen already on YouTube and from what I've seen at other people that have done this swap.
Cool Beans!
Oldiron440
Well-Known Member
I'm intrested in this swap it should fit the 8 3/4 and Dana also.
Do you have the Jeep rotor diameter?
Do you have the Jeep rotor diameter?
80mirada
Well-Known Member
Chrysler eliminated the bottom bolt at some point, but did not change the pattern or the gasket. If you grab a brake set from a Liberty they have replaceable pad slide guides, which are nice.
I still need to finish hooking them up..... maybe spring
I still need to finish hooking them up..... maybe spring
80mirada
Well-Known Member
The brackets have to be modified on 8.75 and Dana 60 of stock bearings are used for adjuster clearance. The jeep rotors are 11.2" x 2.3" nonvented
Oldiron440
Well-Known Member
So they will fit a15" wheel?
80mirada
Well-Known Member
Yep, I had everything mocked up with the wheels on, I pulled the calipers off to rebuild and coat, but they are still in their parts tray waiting for me.
