I found this, but I don't think that the axle housing 4 bolt flanges are the same bolt patterns as our old GMC D44's (3.5"x3" from memory? same as "Big Fords), $445 for the kit really isn't too bad vs the $775 Wilwood. On the axle housing flange bolt pattern, it does appear that there is a second set of hole knockouts below the first, that are more symmetrical-appearing to the upper set of holes, so perhaps this could fit? Not sure on the center bore, either. This can all be adjusted with some precision and skill (or a machinist friend if the center bore is not the same).
https://eastcoastgearsupply.com/i-17...brake-kit.html
Fits 1990 to 2006 Wrangler With Dana 44 and Dana 35. Fits 1990 to 2001 XJ Cherokee With Dana 35 and Chrysler 8.25in.
Dramatically increase your braking power by upgraded your drums to this performance rear disc brake kit.
Kit Includes:
*Two Premium Rotors (5x4.5 & 5x5.5 Drilled)
*Premium Pads
*Two New Calipers
*Two New Backing Plates with Shoes Installed
*Two Stainless Steel Brake Lines
*Two Bearing Spacers
*All Mounting Hardware
Select To Add E-Brake Cables Below
Also read that a 1995-ish Ford Crown Victoria has a rear disc Dana 44... THIS may be one to look into as perhaps there is a chance that it has a 5 on 5 pattern:
https://www.naxja.org/forum/showthread.php?t=1045256
THIS:
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Originally Posted by From https://www.cj-8.com/threads/isuzu-dana-44-rear.7135/
I installed an Isuzu Rodeo dana 44 rear to replace my aging scout rear. 93 and up Rodeos are standard dana 44s with rear disc brakes (the kind with the drum parking brake like the Ford 8.8). They are also centered diff (both shafts the same length) and come with either 4.10 or 4.3 gearing and usually trac-lock. The shafts are 1.45" diameter (huge) vs. 1.31" like other dana 44s and non 35-spline dana 60s (35-spline 60 is 1.50"). The e-brake cables easily adapt to the jeep setup. I have better brake feel than ever before without any mods. Rodeo rears are 58" width just like the scout, but it does require 6 bolt rims. It allows easily switching to a dana 44 front from either chevy, dodge, or wagoneer, and you no longer have to search for the 74-76 spindles to retain the 5 bolt pattern if you want a front 44. Early Honda Passports used the exact same rear. These axles are very abundant in salvage yards, so it's easy to grab some spare shafts. You do need to change the flanged pinion yoke with a standard u-joint type yoke, but that's easy. I just wanted to offer a nice alternative to the Scout rear option. Enjoy!
The Isuzu brake fittings are metric and did need to be adapted, but that was trivial. Early Rodeos and I think all Troopers use the Isuzu corporate rear with the dropout third member, but I'm not highly versed in the Isuzu line.
Also be aware that the lug bolts are metric on the Isuzu axle. You can replace these if you wish or just get metric lug nuts. Just make sure the tire store guy knows when you go to rotate tires. 
motherload of Isuzu Dana 44 data on this page:
http://www.isuzu4x.com/modules.php?n...howpage&pid=21
Finally, link to Isuzu D44 thread on Pirate4x4:
http://www.pirate4x4.com/forum/archi.../t-282793.html |
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Originally Posted by From Jp Magazine
Isuzu Dana 44
Axle: ’93-present Isuzu Dana 44
Lug pattern: 6-on-5 ½
Differential location: Centered
Width: 58 inches
Spring location: Spring-under 39 ½ inches apart
Perch width: 2 ½ inches; some have four-link brackets
Common ratio: 4.30:1
Swap into: It’s a perfect swap for Dana 35s or the Chrysler 8¼ rears found in YJs, TJs, and XJs. The only bummer is the 6-lug pattern. It can either be redrilled or the front can be changed to match using a hub conversion kit. This 44 will also work well in early models looking for more width and stability as long as your Jeep needs a centered differential.
Bonus tips: The Isuzu 44 has a weird flange style yoke but it can be swapped out for a regular Dana 44 1310 or whatever size U-joint you want. All of the internals are the same as other Dana 44s. It has 30-spline flanged axles, strong tubes, and even comes with disc brakes and cool separate drums for an e-brake. However, you will need tubing adapters to mate standard brake lines to the metric lines on the Isuzu axle. The original perches are too far apart to fit most Jeeps so they will need to be removed and welded in the proper locations.
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Aha... Jeep ZJ = Grand Cherokee:
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Originally Posted by From http://www.billavista.com/tech/Articles/Dana_44_Rear_Axle_Disc_Brake_Conversion/index.html
This shows the difference. The center will need to be reamed out, the bolt pattern welded and re-drilled to match, and a custom spacer (next pic) machined to fit on the shaft outboard of the axle seal, to ensure the bearing sits in the race properly. Note that the D35 NON c-clip axle bearing retainer bolt pattern is identical to the D44, and so if you copy what I did you can fit the ZJ discs on your d35 non c-clip the same way. |
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Originally Posted by From https://comancheclub.com/topic/19532-rear-disc-brake-conversion/
IMO, the Explorer conversion is the easiest to obtain. There are plenty of 4-disc Explorers in the junkyards. Here's my Explorer rear disc equipped Dana 44.
ZJ (Grand Cherokee) rear discs are not a direct bolt on for a Commanche D44. You need to make a spacer (axle retainer) as the ZJ one is not thick enough. You'll also need to enlarge the center hole of the backing plate a bit as well for the D44.
As far as bolt-on kits available on the market; Crown as well as TeraFlex both make kits now that include everything needed and that will simply just bolt-on. |
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Originally Posted by From https://dandcextreme.com/product/scout-ii-rear-disc-brake-kit/
Scout II Rear Disc Brake Kit
The Scout II Rear Disc Brake kit from D and C Extreme provides an easy to install, bolt on solution for upgrading your Scout II Dana 44 rear axle. As most Scout owners know the rear drum brakes are one off parts only used on the Scouts and the parts are getting harder to come by and more and more expensive all the time. With the stock drum brake parts getting harder to find now is the time to upgrade to rear disc brakes. Our kit provides all the brackets and spacers to fit the unique flange found on the Scout II Dana 44 rear axle. The kit also includes the brake hoses and an e-brake cable extension kit. If you’ve been shopping around you’ll see that these items are options on a lot of other kits out there.
Our kit is 100% bolt on and you do NOT have to remove the axle/wheel bearing for the install! Top that off with our custom 5 on 5 1/2″ bolt pattern rotors that fit over the axle flange with NO machining required. Our Scout II rear disc brake kit is one of the easiest ways to improve your Scout’s braking performance.
The D and C Extreme Scout II Rear Disc Brake kit is available in both standard and high performance models. For $50.00 you can upgrade to the high performance kit which consists of cross-drilled and slotted rotors and stainless steel braided brake lines. With the high performance kit you can also add red or black powder coated calipers for an additional $50.00.
All New From the Start
This kit uses all new parts, the calipers are NOT rebuilt, they are brand new GM metric style and use standard metric brake pads available at any auto parts store. Our brackets are all laser cut and plated. The E-brake cables, hoses, and rotors are all brand new and we keep individual parts in stock if you would ever need them.
Applications:
IH Scout II 1971 – 1980
IH Scout II Terra 1976 – 1980
IH Scout II Traveler 1976 – 1980
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More on the Crown Vic D44 rear discs:
https://www.jeepin.com/features/cvdiscs
A mention from the Explorer forum that perhaps the Crown Victoria (CV) rear discs have a different axle housing flange bolt pattern than the Ford Explorer D44's, and also highlights using some Ford Ranger rear disc parts as an upgrade to the Explorer setup for longer pads and more resistance to brake fade:
https://www.explorerforum.com/forums...pgrade.459983/
So far, it sounds to me as if the Crown Victoria or Explorer (or Ranger?) rear disc brakes with integral rotor hat drum parking brake will be the easiest swap. Perhaps they are both 5 on 5.5? Not sure on axle housing bolt patterns, I think those two may have different patterns. [EDIT - it sounds like the Explorer is the smaller 5 on 4.5" bolt circle...)