Dana 44 JB7 UPGRATED

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fsj454
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Dana 44 JB7 UPGRATED

Post by fsj454 »

Have calipers .disc pads. Stock Brake hoses modified to fit calipers . OK I put 25000 miles on JB6 Calipers with JB7 BRAKE PADS and noticed that the pads had odd ware marks like the pad was to big for the rotor . The question is what rotor do I need chevy or jeep or are they the same 6 lug rotor 1990GW
:fsj:454.nv4500.205.twin stick.hydo boost. hydrolic clutch.dana 60s.soa.37s 17inch.tration bar.warn 1200. 4 wheel disc.aero29 gallon .conferr roof rack.spal pulse width modulation.spal duel fans.painless battery isolator.duel batterys.factory cb. headers 2 1/2 duels.4.56 Detroit locker.alloy 35 spline axles.stainless brake lines .holley 770.edelbrock.fuel.water.intake.H4s.head light relays.racho 9000 shocks.rock ram.steering box brace.j20 steering box.msd8265 probillet distributor.msd super conductor wires.
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derf
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Re: Dana 44 JB7 UPGRATED

Post by derf »

I went with the JB7 spec rotors when I installed the rest. No unusual wear on my brakes.

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fsj454
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Re: Dana 44 JB7 UPGRATED

Post by fsj454 »

TY.I will be getting new rotors but would like to now what jb7 spec. rotors are . I have 6 lug . Just purchased all bearings and seals but need rotors this 1990 GW is all stock . I will be removing rotors today and see if I can get them turned . I think the uneven wear marks are because I removed jb6 pads and installed jb7 pads in jb6 calipers without turning rotors . TY GUYS FOR ALL THE HELP
:fsj:454.nv4500.205.twin stick.hydo boost. hydrolic clutch.dana 60s.soa.37s 17inch.tration bar.warn 1200. 4 wheel disc.aero29 gallon .conferr roof rack.spal pulse width modulation.spal duel fans.painless battery isolator.duel batterys.factory cb. headers 2 1/2 duels.4.56 Detroit locker.alloy 35 spline axles.stainless brake lines .holley 770.edelbrock.fuel.water.intake.H4s.head light relays.racho 9000 shocks.rock ram.steering box brace.j20 steering box.msd8265 probillet distributor.msd super conductor wires.
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derf
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Re: Dana 44 JB7 UPGRATED

Post by derf »

When I built my axle I bought rotors, calipers, and pads for an 85 K20 with JB7 brakes. But I run 8 lug hubs and rotors.

As long as the rotor is the right diameter and thickness, and you use the JB7 calipers and pads you should be good.

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fsj454
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Re: Dana 44 JB7 UPGRATED

Post by fsj454 »

TY I also run K30 stuff in my 1982 CHEROKEE DD I have JB7 in the rear . Dana 44 all apart and rotors are . OK I will get a chevy JB7 rotor with 13 inch drums in rear . :fsj:
Last edited by fsj454 on Sun Sep 22, 2019 5:23 pm, edited 1 time in total.
:fsj:454.nv4500.205.twin stick.hydo boost. hydrolic clutch.dana 60s.soa.37s 17inch.tration bar.warn 1200. 4 wheel disc.aero29 gallon .conferr roof rack.spal pulse width modulation.spal duel fans.painless battery isolator.duel batterys.factory cb. headers 2 1/2 duels.4.56 Detroit locker.alloy 35 spline axles.stainless brake lines .holley 770.edelbrock.fuel.water.intake.H4s.head light relays.racho 9000 shocks.rock ram.steering box brace.j20 steering box.msd8265 probillet distributor.msd super conductor wires.

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fsj454
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Re: Dana 44 JB7 UPGRATED

Post by fsj454 »

I could not find any chevy 6 lug JB7 spec rotors so I purchased 2 NAPA stock 1990 GW rotors 62.50 to the door with coupon code SOCIAL20 . I will give total cost for upgrade when I pickup ac delco disc pads .I LOVE CHASING CLASIC PARTS
:fsj:454.nv4500.205.twin stick.hydo boost. hydrolic clutch.dana 60s.soa.37s 17inch.tration bar.warn 1200. 4 wheel disc.aero29 gallon .conferr roof rack.spal pulse width modulation.spal duel fans.painless battery isolator.duel batterys.factory cb. headers 2 1/2 duels.4.56 Detroit locker.alloy 35 spline axles.stainless brake lines .holley 770.edelbrock.fuel.water.intake.H4s.head light relays.racho 9000 shocks.rock ram.steering box brace.j20 steering box.msd8265 probillet distributor.msd super conductor wires.
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derf
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Re: Dana 44 JB7 UPGRATED

Post by derf »

JB7 was only for the 3/4 ton 8 lug. You can probably find some rotors that should work. I suspect that the rotor is bigger than a stock Wagoneer rotors. It would be a good idea to verify that.

You might look at newer Chevy 1500 trucks as brakes got bigger over the years and the 1500 stayed 6 lug.
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Cecil14
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Re: Dana 44 JB7 UPGRATED

Post by Cecil14 »

FWIW: I've been running stock rotors with JB7 calipers/pads for over a decade now. Works fine, no unusual wear that I've seen.
1983 J-10 - 4.6L(MPFI)/CS130D/Hydroboost/NV3550/D300/44/44/3.54/Disc-Disc/32s/42 gallon 'burb tank

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fsj454
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Re: Dana 44 JB7 UPGRATED

Post by fsj454 »

TY Cecil that's the plan . And the edge groves are from the jb6 pads .What I did was install JD7 pads on rotors that where running JB6 pads and calipers . . What I did was put JB7 pads on JB6 rotors and calipers .I no. rotors are the same but where warn from a smaller pad so that gave me groves in large pads TY ALL
:fsj:454.nv4500.205.twin stick.hydo boost. hydrolic clutch.dana 60s.soa.37s 17inch.tration bar.warn 1200. 4 wheel disc.aero29 gallon .conferr roof rack.spal pulse width modulation.spal duel fans.painless battery isolator.duel batterys.factory cb. headers 2 1/2 duels.4.56 Detroit locker.alloy 35 spline axles.stainless brake lines .holley 770.edelbrock.fuel.water.intake.H4s.head light relays.racho 9000 shocks.rock ram.steering box brace.j20 steering box.msd8265 probillet distributor.msd super conductor wires.
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Cecil14
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Re: Dana 44 JB7 UPGRATED

Post by Cecil14 »

Yah, in that case I would fully expect problems. I replaced everything when I did my upgrade, my rotors were shot anyway.
1983 J-10 - 4.6L(MPFI)/CS130D/Hydroboost/NV3550/D300/44/44/3.54/Disc-Disc/32s/42 gallon 'burb tank

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fsj454
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Re: Dana 44 JB7 UPGRATED

Post by fsj454 »

I put brakes together and I cannot spin rotor .Stock jeep GW rotor .jb7 caliper . Bendix mkd153fm pads .no fluid in system .Got the brake pads from a friend .
:fsj:454.nv4500.205.twin stick.hydo boost. hydrolic clutch.dana 60s.soa.37s 17inch.tration bar.warn 1200. 4 wheel disc.aero29 gallon .conferr roof rack.spal pulse width modulation.spal duel fans.painless battery isolator.duel batterys.factory cb. headers 2 1/2 duels.4.56 Detroit locker.alloy 35 spline axles.stainless brake lines .holley 770.edelbrock.fuel.water.intake.H4s.head light relays.racho 9000 shocks.rock ram.steering box brace.j20 steering box.msd8265 probillet distributor.msd super conductor wires.
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Cecil14
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Re: Dana 44 JB7 UPGRATED

Post by Cecil14 »

I just pulled up the specs for an '85 Chevy K20 front rotor and '85 J10 front rotor (Rock Auto):

Chevy: 12.5" x 1.295"
Jeep: 11.86" x 1.285"

The Jeep rotor should work. Are you sure the piston is seated as far as it'll go into the caliper?
1983 J-10 - 4.6L(MPFI)/CS130D/Hydroboost/NV3550/D300/44/44/3.54/Disc-Disc/32s/42 gallon 'burb tank

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fsj454
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Re: Dana 44 JB7 UPGRATED

Post by fsj454 »

YES I put c clamp on piston . but I will try to compress again . I think the shoes I got for free is because the last person had the same problem they must be rejects . Cecil thanks and what brand shoes do like
:fsj:454.nv4500.205.twin stick.hydo boost. hydrolic clutch.dana 60s.soa.37s 17inch.tration bar.warn 1200. 4 wheel disc.aero29 gallon .conferr roof rack.spal pulse width modulation.spal duel fans.painless battery isolator.duel batterys.factory cb. headers 2 1/2 duels.4.56 Detroit locker.alloy 35 spline axles.stainless brake lines .holley 770.edelbrock.fuel.water.intake.H4s.head light relays.racho 9000 shocks.rock ram.steering box brace.j20 steering box.msd8265 probillet distributor.msd super conductor wires.
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Cecil14
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Re: Dana 44 JB7 UPGRATED

Post by Cecil14 »

I have had good luck with Wagner pads, but I wouldn't swear by them or anything. I like ceramics myself, as I don't like the corrosive dust from organic pads. There is some sacrifice in overall stopping power, though, I think.

I'd say have them pull a set at the store for you and measure them. You know the rotor thickness, and you can measure the caliper opening. Make sure the new pads are less than that difference. Even with new pads, you should have to pump the brakes a time or two to tighten the caliper the first time around.
1983 J-10 - 4.6L(MPFI)/CS130D/Hydroboost/NV3550/D300/44/44/3.54/Disc-Disc/32s/42 gallon 'burb tank

rocklaurence
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Re: Dana 44 JB7 UPGRATED

Post by rocklaurence »

fsj454 wrote: Sun Sep 29, 2019 11:53 am I put brakes together and I cannot spin rotor .Stock jeep GW rotor .jb7 caliper . Bendix mkd153fm pads .no fluid in system .Got the brake pads from a friend .
A couple years ago I did a SAS on a Chevy Tahoe, Ford HP dana 44 with Jeep/Chevy 6 lug knuckles/hubs/rotors and had the same issue. I thinned the pads a little to make them fit. I sanded them down on a flat table with 40 grit paper--dont judge me! :lol:

smithgm
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Re: Dana 44 JB7 UPGRATED

Post by smithgm »

I plan to replace my brake lines with braided and longer for a lift when I do this. Should I stick with GW lines or should I get something designed for the Chevy calipers? I understand from talking to derf that the GW will work with some shims, but since I'm replacing anyway should I use something else?
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Cecil14
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Re: Dana 44 JB7 UPGRATED

Post by Cecil14 »

smithgm wrote: Mon Sep 30, 2019 8:20 am I plan to replace my brake lines with braided and longer for a lift when I do this. Should I stick with GW lines or should I get something designed for the Chevy calipers? I understand from talking to derf that the GW will work with some shims, but since I'm replacing anyway should I use something else?
Have a parts store pull one of each (GW and 1985 Chevy K20 JB7) line for you and compare them. If they look like a match to you, go with the one from the Chevy.
1983 J-10 - 4.6L(MPFI)/CS130D/Hydroboost/NV3550/D300/44/44/3.54/Disc-Disc/32s/42 gallon 'burb tank

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fsj454
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Re: Dana 44 JB7 UPGRATED

Post by fsj454 »

BELEAVE OR NOT .... There was a small casting nipple on the back of jb7 caliper that hits jb6 caliper brackets grinded :D WALA all fixed... New races. bearing .axle ujoints .rotor .brake pads .rebuilt calipers .seal kit . rubber hoses .stainless brake line prebent complete kit .rear rubber hose .The last and only thing left is the rear wheel cylinders . ANY GOOD CHEAP PART NUMBERS
:fsj:454.nv4500.205.twin stick.hydo boost. hydrolic clutch.dana 60s.soa.37s 17inch.tration bar.warn 1200. 4 wheel disc.aero29 gallon .conferr roof rack.spal pulse width modulation.spal duel fans.painless battery isolator.duel batterys.factory cb. headers 2 1/2 duels.4.56 Detroit locker.alloy 35 spline axles.stainless brake lines .holley 770.edelbrock.fuel.water.intake.H4s.head light relays.racho 9000 shocks.rock ram.steering box brace.j20 steering box.msd8265 probillet distributor.msd super conductor wires.
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