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  #1  
Old May 14th, 2019, 20:20
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4x4JeePmaNthINg 4x4JeePmaNthINg is offline
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C8.25 disc swap ?s

Hey all,
Wanted to get my wits about me before delving further into this venture. I know there are many options for donor disc swaps, a loads of how to threads.


One question that popped into my head was: are there any size differences to these zj,kj.... options, so far as do any have a bigger pad that may bite better?

Anyone have any preference for E brake set up?
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  #2  
Old May 14th, 2019, 20:28
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4x4JeePmaNthINg 4x4JeePmaNthINg is offline
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Re: C8.25 disc swap ?s

do you need longer wheel studs if your running Steelies?



*could a Moderator please move this to modified.
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Old May 14th, 2019, 20:32
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Re: C8.25 disc swap ?s

It does not matter for backing plate or rotor, but if you get pads and calipers for a late model TJ or TJ Rubicon you will get a 40% or so bigger pad. There won't really be more clamping force on it but it will last longer and displace heat better.
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Old May 14th, 2019, 20:32
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C8.25 disc swap ?s

I used the Dana 35 backing plates and rotors/calipers.

Absolutely put on longer studs. Who knows when you might have to put on an aluminum wheel in a pinch.


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  #5  
Old May 14th, 2019, 21:43
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Re: C8.25 disc swap ?s

What size stud for the 8.25 for the backing plate, doesn't seem safe for reusing the donor axles plate studs.

Cal, Ide love to use tj parts but good luck finding that around here, zj/liberty can be found.

Does any thickness of the backing plate change for so v8 vs anything else.

The biggest reason for this upgrade is about the only option there is to hold onto axles enough to hopefully pull a vehicle over if needed, I the event of an axle break.
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Old May 15th, 2019, 05:23
RCP Phx RCP Phx is offline
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Re: C8.25 disc swap ?s

I had no need for longer backing plate studs. The KJ is the only one that's a direct fit for a 8.25". For the best pad get the EBC Truck Yellow's.
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Old May 15th, 2019, 07:21
RCP Phx RCP Phx is offline
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Re: C8.25 disc swap ?s

Quote:
Originally Posted by 4x4JeePmaNthINg View Post
The biggest reason for this upgrade is about the only option there is to hold onto axles enough to hopefully pull a vehicle over if needed, I the event of an axle break.
Btw, 8.25 axles are pretty strong so if you haven't done anything with your d30 it would be more likely to break first. I ran mine pretty hard for 16yrs before I decided on a brake upgrade so I did everything at one time hoping that would last for my lifetime! Yukon for the rear and Ten factory for the front.



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Old May 15th, 2019, 07:25
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Re: C8.25 disc swap ?s

I was kinda wondering how somebody would be breaking an almost Dana 44 strength Chry 8.25 axle shaft while on pavement ?
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Old May 16th, 2019, 06:30
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Re: C8.25 disc swap ?s

Quote:
Originally Posted by Tim_MN View Post
I was kinda wondering how somebody would be breaking an almost Dana 44 strength Chry 8.25 axle shaft while on pavement ?
4.56 ARB locked on nitto 33s soon 35s. Who's saying I plan on breaking on pavement? I hope nothing breaks, but a 44 vs 8.25 have limits and very different outcomes if a shaft goes......
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Old May 16th, 2019, 06:31
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Re: C8.25 disc swap ?s

Quote:
Originally Posted by RCP Phx View Post
Btw, 8.25 axles are pretty strong so if you haven't done anything with your d30 it would be more likely to break first. I ran mine pretty hard for 16yrs before I decided on a brake upgrade so I did everything at one time hoping that would last for my lifetime! Yukon for the rear and Ten factory for the front.



Yeah, I want all of that, especially the front break upgrade. At least I can wish.
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  #11  
Old May 16th, 2019, 08:49
RCP Phx RCP Phx is offline
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Re: C8.25 disc swap ?s

It may look like a lot of parts and work but each axle only was a days work. They were about the same amount of work and cost's.
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Old May 16th, 2019, 08:51
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Re: C8.25 disc swap ?s

Quote:
Originally Posted by 4x4JeePmaNthINg View Post
What size stud for the 8.25 for the backing plate, doesn't seem safe for reusing the donor axles plate studs.

Cal, Ide love to use tj parts but good luck finding that around here, zj/liberty can be found.

Does any thickness of the backing plate change for so v8 vs anything else.

The biggest reason for this upgrade is about the only option there is to hold onto axles enough to hopefully pull a vehicle over if needed, I the event of an axle break.
You should not be buying used pads or calipers.

Every parts house has them.
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