392 Rear Brake Swap

[mwilk012]

As far as I have been able to find, all except the sport have the same size front brakes, and the 392 should have the largest rear brakes.

What I’d like to know, is what all would be required to add 392 sized rear brakes to any other Jeep? Online parts catalogs are very bad when it comes to these brake parts.

Can any 392 owners take a photo of their right rear caliper to compare? Should have a just slightly larger diameter rotor that is vented and thicker than mine here.

Or, if anyone has done this change, details would be appreciated.

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[DOOKEY]

?

 

[DOOKEY]

?

 

[DOOKEY]

Maybe.

 

[mwilk012]

Well, they look identical. Hmmm.

 

[mwilk012]

These are the part numbers I was able to find today for a 392’s rear brakes. Nothing matches my ‘18 Rubicon.
Still unsure if the mounting holes for the caliper brackets line up or not.

 

[Kindapointless]

392 rears are 4xe rears are gladiator rears. Will bolt on even to a jk. Fronts are like that too rubicon, 4xe, 392 and gladiator are the same and can be swapped to sports and saharas and jks even with dana 30s. These rears are bigger and vented so thicker at 22mm. To swap you need calipers, caliper brackets, pads and rotors. Autozone or napa can hook you up with the gladiator parts cheap. Also the 392s master cylinder is the gladiator part number..different booster of course. Some say the xrs improved brakes are more aggressive pads and the vacuum pump brake booster from the 4xe/2.0 but available on the 3.6, can't tell for sure since most mopar diagrams are missing those numbers for the vins I have tried so far. I have put gladiator/392/4xe brakes on my previous jk. I didn't have enough master cylinder for both ends but did just fine with fronts only running 54mm ram calipers on rubicon brackets

 

[mwilk012]

392 rears are 4xe rears are gladiator rears. Will bolt on even to a jk. Fronts are like that too rubicon, 4xe, 392 and gladiator are the same and can be swapped to sports and saharas and jks even with dana 30s. These rears are bigger and vented so thicker at 22mm. To swap you need calipers, caliper brackets, pads and rotors. Autozone or napa can hook you up with the gladiator parts cheap. Also the 392s master cylinder is the gladiator part number..different booster of course. Some say the xrs improved brakes are more aggressive pads and the vacuum pump brake booster from the 4xe/2.0 but available on the 3.6, can't tell for sure since most mopar diagrams are missing those numbers for the vins I have tried so far. I have put gladiator/392/4xe brakes on my previous jk. I didn't have enough master cylinder for both ends but did just fine with fronts only running 54mm ram calipers on rubicon brackets

Thanks! I think I’ll probably try swapping the rear brakes in whenever mine are due for replacement. A minor upgrade but an upgrade anyway. I planned on ordering the set from Powerstop, but their availability on Calipers has been terrible lately.

 

[Joeee]

Anybody have try the combination, some new about this subject ?

 

[AnnDee4444]

I don't have any swap info, but I do have a chart comparing all the JL parts.

	Front rotor diameter	Front rotor width	Front rotor type	Front caliper piston size	Front caliper piston count	Front caliper type	Rear rotor diameter	Rear rotor width	Rear rotor type	Rear caliper piston size	Rear caliper piston count	Rear caliper type
Sport	330	24	Vented	48	2	Floating	328	12	Solid	45	2	Floating
Sahara	330	28	Vented	51	2	Floating	342	14	Solid	48	2	Floating
Rubicon	330	28	Vented	51	2	Floating	342	14	Solid	48	2	Floating
Sahara 4xe	330	28	Vented	51	2	Floating	345	22	Vented	51	2	Floating
Rubicon Xtreme Recon	330	28	Vented	51	2	Floating	345	22	Vented	51	2	Floating
Rubicon 4xe	330	28	Vented	51	2	Floating	350	22	Vented	51	2	Floating
Rubicon 392	330	28	Vented	51	2	Floating	350	22	Vented	51	2	Floating

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