Dayna 60-2 12"brake to 11" Brake conversion

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pksjeep
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Dayna 60-2 12"brake to 11" Brake conversion

Postby pksjeep » Sat Jul 07, 2018 10:42 am

I have a J-200 Thrift side truck with 11" brakes. I also have a 5 lug Dayna 60-2 track loc rear end that I want to put in, it had 12" brakes. I built 1/2" thick adaptors for the 11" backing plate, and turned out the bore in the in the backing plate to fit the brarings. The problem I have is every thing is tight ( brakes and assorted springs) behind the axle flange to the backing plate. I want to take out the 1/2" spacer to get more working space. Has anyone downsized the 12" brakes to 11" on this axle? What parts did you use>

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Kaiserman
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Re: Dayna 60-2 12"brake to 11" Brake conversion

Postby Kaiserman » Sat Jul 07, 2018 12:41 pm

You might look into MOPAR Dana 60-2 brakes. They used them in several big block muscle cars. Pretty sure those where 11" brakes.
1983 Wagoneer Limited Classic black
1971 J2500 Gladiator Custom-Cab Platform Stake on 126" wb. B350/T18A/D20 D60/D60-3 w/locker 4.10's Ramsey 8klb PTO winch, Day-brook dump. 235/85R16's
1969 J3800 Gladiator 3407Z Camper Truck. B350/T18A/D20 D44/D60-3 w/4.10's
1968 J3800 Gladiator 3406Z Custom Cab 160" wheel base dually. 24K miles. B350/T18A/D20 D44HD/D70 posi w/4.88's 7/50-16's
1963 J300 Gladiator Townside Buick 350/Th400/D20 D44/D53 4.27 gears. Stock Meyers plow, 225/95R16's

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fulsizjeep
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Re: Dayna 60-2 12"brake to 11" Brake conversion

Postby fulsizjeep » Sat Jul 07, 2018 1:02 pm

I don't know about any other Mopar applications but I do know the 67 Charger w/D60 had 11x2.5" brakes. The lug pattern for drums is 5x4.5" however.
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Nikkormat
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Re: Dayna 60-2 12"brake to 11" Brake conversion

Postby Nikkormat » Sun Jul 08, 2018 10:12 pm

Best option is a disk conversion, but i"m interested to hear how this turns out.

Does the dana 44 backing plate bolt on? I was under the impression they were totally different.
Gabe, "reformed" Jeep hoarder.

1974 Cherokee - 401 Jeep with Trans Am Red and White two tone
1974 J10 - Ex 401 Shortbed Pioneer with Black and White two tone
1986 Grand Wagoneer - Gold and Crispy with a very sad 727
1990 Grand Wagoneer - Dover Grey and in pieces
1991 Grand Wagoneer - Spinnaker Blue and almost on the road to it's new owner
1998 Cherokee - It gets 20 MPG AND has a Lund visor!

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Stuka
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Re: Dayna 60-2 12"brake to 11" Brake conversion

Postby Stuka » Mon Jul 09, 2018 9:55 am

Nikkormat wrote:Best option is a disk conversion, but i"m interested to hear how this turns out.

Does the dana 44 backing plate bolt on? I was under the impression they were totally different.


He is using an adapter to make the D44 backing plate bolt up.

To my knowledge, there aren't any disc brake kits for a Jeep D60-2. I know they exist for chrysler car D60-2's, but they use a different bolt pattern.
1981 J10 AMC 258 with HEI and Weber 32/36 DGEV Carb, T176, NP208, D44/M23 with 4.56 gears and Detroit Locker, 6" lift, 33x12.50 Cooper STT's, BJ's Offroad Rear Dozer Bumper.
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Herk
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Re: Dayna 60-2 12"brake to 11" Brake conversion

Postby Herk » Mon Jul 09, 2018 8:57 pm

Try mounting the backing plates without the spacer and use a drum that's 1/2 deeper. Early 80's to 93 half ton Dodge could work, but the center register bore will need to be enlarged which is pretty straightforward lathe work. I was getting ready to mock up this setup to replace the disk conversion when my truck was hit.

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Nikkormat
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Re: Dayna 60-2 12"brake to 11" Brake conversion

Postby Nikkormat » Tue Jul 17, 2018 11:13 am

TSM MFG out of Colorado Springs CO makes a disk conversion kit and so can any of us.

Buy some weld on Caliper brackets for GM calipers from Speedway Motors.

1985 F150 4wd front rotors

Either 1978 Wagoneer front calipers (no E-Brake provision)
Or some Cadillac Eldorado rear calipers (not sure on the year) if you want parking brakes.
Gabe, "reformed" Jeep hoarder.

1974 Cherokee - 401 Jeep with Trans Am Red and White two tone
1974 J10 - Ex 401 Shortbed Pioneer with Black and White two tone
1986 Grand Wagoneer - Gold and Crispy with a very sad 727
1990 Grand Wagoneer - Dover Grey and in pieces
1991 Grand Wagoneer - Spinnaker Blue and almost on the road to it's new owner
1998 Cherokee - It gets 20 MPG AND has a Lund visor!

Herk
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Re: Dayna 60-2 12"brake to 11" Brake conversion

Postby Herk » Tue Jul 17, 2018 8:21 pm

Anybody who suggests ElDorado calipers has either never owned a set, is a pathological liar, or should be charged with attempted murder. They really are that bad.

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Nikkormat
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Re: Dayna 60-2 12"brake to 11" Brake conversion

Postby Nikkormat » Tue Jul 17, 2018 9:35 pm

Herk wrote:Anybody who suggests ElDorado calipers has either never owned a set, is a pathological liar, or should be charged with attempted murder. They really are that bad.


I have heard they are terrible to adjust, any better suggestion?
Gabe, "reformed" Jeep hoarder.

1974 Cherokee - 401 Jeep with Trans Am Red and White two tone
1974 J10 - Ex 401 Shortbed Pioneer with Black and White two tone
1986 Grand Wagoneer - Gold and Crispy with a very sad 727
1990 Grand Wagoneer - Dover Grey and in pieces
1991 Grand Wagoneer - Spinnaker Blue and almost on the road to it's new owner
1998 Cherokee - It gets 20 MPG AND has a Lund visor!

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Stuka
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Re: Dayna 60-2 12"brake to 11" Brake conversion

Postby Stuka » Wed Jul 18, 2018 12:28 pm

One of these days, somebody needs to make a kit that uses the internal drums that most newer vehicles have for a parking brake.
1981 J10 AMC 258 with HEI and Weber 32/36 DGEV Carb, T176, NP208, D44/M23 with 4.56 gears and Detroit Locker, 6" lift, 33x12.50 Cooper STT's, BJ's Offroad Rear Dozer Bumper.
2017 JKU Rubicon Lifted
Pevious Jeeps: 1975 Cherokee, 2008 JK, 2005 KJ, 1989 XJ

pksjeep
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Re: Dayna 60-2 12"brake to 11" Brake conversion

Postby pksjeep » Sun Jul 22, 2018 3:50 pm

At this point I am going to try and modify some 88 ford f150 rear drums. I will need to enlarge the center bore and remove some of the inner lip on the drum. With this set I will remove the spacers I built. I also looked at dodge van/ truck drums, would be similar but I would have to remove even more on the backside of the drum lip.
I am hoping my lathe is large enough to turn the drums. I am currently building a fixture to turn out the center bore and cut the backside lip.
It looks like everything I looked at so far is going to require turning out the center bore.
I have thought about disk brakes however I am afraid disc brakes in the rear and drums in the front will continue to skid the back first and give me the scary ride I already have.

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Stuka
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Re: Dayna 60-2 12"brake to 11" Brake conversion

Postby Stuka » Sun Jul 22, 2018 5:37 pm

Did you look at Ford D60-2 drums that were used on vans up through the 90's?
1981 J10 AMC 258 with HEI and Weber 32/36 DGEV Carb, T176, NP208, D44/M23 with 4.56 gears and Detroit Locker, 6" lift, 33x12.50 Cooper STT's, BJ's Offroad Rear Dozer Bumper.
2017 JKU Rubicon Lifted
Pevious Jeeps: 1975 Cherokee, 2008 JK, 2005 KJ, 1989 XJ

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Nikkormat
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Re: Dayna 60-2 12"brake to 11" Brake conversion

Postby Nikkormat » Fri Jul 27, 2018 12:38 pm

So here me out here...

The 8 lug drums are still in production.
The 8 lug drum would fit if they had the correct lug pattern.

See where I'm going with this yet?

Get some drums from a J4700 or J4800 and redrilled them 5 lug. They're hub-centric anyway, so if the bolt pattern is slightly off or has an overlapped hole it's not that big of a deal.
Gabe, "reformed" Jeep hoarder.

1974 Cherokee - 401 Jeep with Trans Am Red and White two tone
1974 J10 - Ex 401 Shortbed Pioneer with Black and White two tone
1986 Grand Wagoneer - Gold and Crispy with a very sad 727
1990 Grand Wagoneer - Dover Grey and in pieces
1991 Grand Wagoneer - Spinnaker Blue and almost on the road to it's new owner
1998 Cherokee - It gets 20 MPG AND has a Lund visor!


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