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Old 04-13-2014, 01:27 PM   #1
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D-35 disc brakes???

Thinking of putting disc brakes on my Dana 35. Looking for more crawling control the drums slip. Best kit? Worth doing? Can I match up my fronts? Last but not least will there be replacement part down the road?

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Old 04-13-2014, 03:05 PM   #2
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Your best bet is to do a ford 8.8 axle swap with disk brakes. Way way stronger then your d35. Unless your d35 is already beefed up.

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Old 04-13-2014, 03:37 PM   #3
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There's really nothing to gain swapping drums for disks other than ease of maintenance.
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Old 04-13-2014, 05:21 PM   #4
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There's really nothing to gain swapping drums for disks other than ease of maintenance.
X2, that is 100% true. In the rear, drum brakes brake just as well as disk brakes do. You would notice no improvement in braking by converting the rears from drum to disk. Been there, done that.
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Old 04-13-2014, 06:39 PM   #5
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your best bet is to do a ford 8.8 axle swap with disk brakes. Way way stronger then your d35. Unless your d35 is already beefed up.
x 2
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Old 04-13-2014, 08:46 PM   #6
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x 2
He wants better braking, going with an 8.8 with disk brakes won't improve his braking one iota.
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Old 04-13-2014, 08:52 PM   #7
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Old 04-13-2014, 09:00 PM   #8
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Again, converting to rear disk brakes will not help the braking problem he described in his first post. Converting to rear disk brakes does not improve braking unless the drum brakes they are replacing are not working as designed.
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Old 04-13-2014, 09:03 PM   #9
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how about better front brakes - this should improve crawling control
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Old 04-13-2014, 09:06 PM   #10
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Again, converting to rear disk brakes will not help the braking problem he described in his first post. Converting to rear disk brakes does not improve braking unless the drum brakes they are replacing are not working as designed.

I never said it would help. I'm not paying for anything on his Jeep, so I don't care what he does to it. I just gave him an option he asked for.
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Old 04-13-2014, 09:35 PM   #11
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There might not be a improvement in breaking, but in the case of a broken shaft it will hold the axle in (hopefully long enough to get to a safer spot). Also discs are easier to work on, less parts, and back on the broken shaft they won't make the rest of your brakes useless if your axle slides out more than 3 inches. You could also Carry spare bolts that hold the caliper on.
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Old 04-13-2014, 11:03 PM   #12
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Again, converting to rear disk brakes will not help the braking problem he described in his first post. Converting to rear disk brakes does not improve braking unless the drum brakes they are replacing are not working as designed.
If you have drums and go thru a puddle or water crossing, you come out with pretty much no brakes. Disc brakes work pretty much the same when wet. That's really the only advantage, plus I think discs are easier to change.
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Old 04-13-2014, 11:39 PM   #13
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Wet braking is not the issue the OP is trying to improve.
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Old 04-13-2014, 11:47 PM   #14
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There might not be a improvement in breaking, but in the case of a broken shaft it will hold the axle in (hopefully long enough to get to a safer spot). Also discs are easier to work on, less parts, and back on the broken shaft they won't make the rest of your brakes useless if your axle slides out more than 3 inches. You could also Carry spare bolts that hold the caliper on.
X 2 plus back in the day there were four wheel drums. Obsolete now. Rear drums obsolete now. Hard to imagine they work as well as disks. I plan to get rear disks someday. It's not high on my list because I can stop fine. I could drive off road before I lifted it too. It's just easier now.
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Old 04-13-2014, 11:57 PM   #15
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First, converting to disks up front can make a dramatic improvement in braking performance... up front. Who here can figure out a reason or two why that isn't the case in the rear? Which is also why front disk and rear drum brakes was such a common combination and is still being sold today
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Old 04-14-2014, 12:03 AM   #16
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First, converting to disks up front can make a dramatic improvement in braking performance... up front. Who here can figure out why that isn't the case in the rear?
The front end dives during braking causing more traction and most of the braking. Rear does little of the braking as it actually gets lighter during braking.

Edit but that's high speeds. Curries rock crawling thing probably has 4 wheel discs.
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Old 04-14-2014, 12:15 AM   #17
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Which is why there is a brake proportioning valve which limits how much braking force the rear brakes are allowed to provide. Even drum rear brakes are capable of providing more braking force than the proportioning valve will allow. Which is why you can't really improve rear axle braking performance. If the rear brakes braked any harder, the rear brakes would lock up because the vehicle weight has been shifted away from the rear to the front. In other words the rear brakes are very easy to lock up which would throw the vehicle into a skid/slide. The brake proportioning valve biases the braking force about 80/20 front to rear.
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Old 04-14-2014, 12:20 AM   #18
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Which is why there is a brake proportioning valve which limits how much braking force the rear brakes are allowed to provide. Even drum rear brakes are capable of providing more braking force than the proportioning valve will allow. Which is why you can't really improve rear axle braking performance. If the rear brakes braked any harder, the rear brakes would lock up because the vehicle weight has been shifted away from the rear to the front. In other words the rear brakes are very easy to lock up which will throw the vehicle into a skid/slide. The brake proportioning valve biases the braking force about 80/20 front to rear.
Great info. Thanks brother.
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Old 04-15-2014, 11:10 AM   #19
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Wow thanks for all the info everyone. My 35 is beefed up with an e locker, 456 gears and axles. So to late to turn back and change the entire axle. Was hoping discs would help in low gear but doesn't sound like it. But drums are a pain to change so maybe disc would help there.

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